Re: [Elecraft] [K3] Elecraft Support?
I have given up on getting a response. My issue was getting some attention and I was asked for some data, which I sent. Then more data was requested and I sent that. Then I never heard back. Covid or No-Covid, working from home or office, Email works. No excuse for lack of communications. Even if the answer is we are too busy to help you. I have given up and find it a waste of time to contact them again. I will just move on to something else. Rich K3RWN On 3/25/2021 20:44 PM, Randy Lake wrote: You are not alone John. I can only imagine the position they must be in with supply and employee issues. It does not excuse the lack of communication. I had an issue with my KIO3B. They did not have any replacement boards so I was told to send in mine and they would repair. This was in January when I sent it out. The only communication I have received has been their receipt acknowledgement and I have reached out a few times. Tough times ! Randy N1KWF On Thu, Mar 25, 2021 at 3:36 PM John Reilly wrote: Last December, I posted a message concerning whether Elecraft is still supporting the K3. My K3s developed a problem with its 100w amplifier. Wayne quickly responded and confirmed Elecraft still supports the K3 100%. A few days later, Doug from Customer Support contacted me. Doug told me they have a K3 amplifier replacement program: you send them your amp and $100, and they send you a refurb'ed amp, built to the latest specs. He advised to expect a little delay due to the amp technician coming down with Covid. I promptly sent them my amp. So, now they have had my amp (and $100) for three months, and I haven't heard a thing. I've requested status -- NOTHING! Definitely NOT the customer service I expect from Elecraft. - John, N0TA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to randyn1...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Elecraft Support?
You are not alone John. I can only imagine the position they must be in with supply and employee issues. It does not excuse the lack of communication. I had an issue with my KIO3B. They did not have any replacement boards so I was told to send in mine and they would repair. This was in January when I sent it out. The only communication I have received has been their receipt acknowledgement and I have reached out a few times. Tough times ! Randy N1KWF On Thu, Mar 25, 2021 at 3:36 PM John Reilly wrote: > Last December, I posted a message concerning whether Elecraft is still > supporting the K3. My K3s developed a problem with its 100w amplifier. > Wayne quickly responded and confirmed Elecraft still supports the K3 > 100%. A few days later, Doug from Customer Support contacted me. > > Doug told me they have a K3 amplifier replacement program: you send them > your amp and $100, and they send you a refurb'ed amp, built to the > latest specs. He advised to expect a little delay due to the amp > technician coming down with Covid. I promptly sent them my amp. > > So, now they have had my amp (and $100) for three months, and I haven't > heard a thing. I've requested status -- NOTHING! > > Definitely NOT the customer service I expect from Elecraft. >- John, N0TA > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to randyn1...@gmail.com -- Randy Lake N1KWF 73 Gunn Rd. Keene,NH __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Elecraft Support?
What is the "Amplifier Swap Program"? 73, and thanks, Dave (NK7Z) https://www.nk7z.net ARRL Volunteer Examiner ARRL Technical Specialist, RFI ARRL Asst. Director, NW Division, Technical Resources On 12/4/20 11:09 AM, John Reilly wrote: Update: The day after I posted on this reflector, I got a call from Doug, Elecraft Customer Support. He introduced me to the Amplifier swap program, which I'll probably take advantage of. He also referred me to a technician who provided an updated schematic and parts information. This is the super support I expected from Elecraft -- I just got impatient. I'm happy! - 73,m John, N0TA Message: 2 Date: Tue, 1 Dec 2020 11:53:57 -0700 From: John Reilly To:Elecraft@mailman.qth.net Subject: [Elecraft] [K3] Elecraft Support? Message-ID: Content-Type: text/plain; charset=utf-8; format=flowed I have a problem with my K3s 100w PA: No power above 12w, and receive signals are down 20 dB. I sent an email to "K3support" a week ago and haven't received a reply. Is that email address still valid? So, I resent the email to "support" yesterday -- no response. Has Elecraft stopped supporting the K3? To make matters worst, I downloaded the K3s Schematics, and the KPA3A schematics (Rev C4?) do not match my Rev E PCB. This sure make troubleshooting a challenge. I have a fairly large investment in Elecraft equipment, in large part due to their past excellent support. Do I need to rethink this? ? - John, N0TA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to d...@nk7z.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Elecraft Support?
I had the exact same problem with my K3s.It was a problem with the 100 watt power amp.It took a little bit before they got to me but it has been repaired and is scheduled to be back today.All told it took about a month.Be patient they get back to you and they will repair it.73Mike KC8WHSent from my Verizon, Samsung Galaxy smartphone Original message From: John Reilly Date: 12/1/20 1:55 PM (GMT-05:00) To: Elecraft@mailman.qth.net Subject: [Elecraft] [K3] Elecraft Support? I have a problem with my K3s 100w PA: No power above 12w, and receive signals are down 20 dB. I sent an email to "K3support" a week ago and haven't received a reply. Is that email address still valid? So, I resent the email to "support" yesterday -- no response. Has Elecraft stopped supporting the K3?To make matters worst, I downloaded the K3s Schematics, and the KPA3A schematics (Rev C4?) do not match my Rev E PCB. This sure make troubleshooting a challenge.I have a fairly large investment in Elecraft equipment, in large part due to their past excellent support. Do I need to rethink this? - John, N0TA__Elecraft mailing listHome: http://mailman.qth.net/mailman/listinfo/elecraftHelp: http://mailman.qth.net/mmfaq.htmPost: mailto:elecr...@mailman.qth.netThis list hosted by: http://www.qsl.netPlease help support this email list: http://www.qsl.net/donate.htmlMessage delivered to kc8wh...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Elecraft Support?
John, We're supporting the K3 100%, as always. Apologies for the delay, which appears to have been caused by Thanksgiving. I'm sure someone will be getting back to you soon. 73, Wayne N6KR > On Dec 1, 2020, at 10:53 AM, John Reilly wrote: > > I have a problem with my K3s 100w PA: No power above 12w, and receive signals > are down 20 dB. I sent an email to "K3support" a week ago and haven't > received a reply. Is that email address still valid? So, I resent the email > to "support" yesterday -- no response. Has Elecraft stopped supporting the K3? > > To make matters worst, I downloaded the K3s Schematics, and the KPA3A > schematics (Rev C4?) do not match my Rev E PCB. This sure make > troubleshooting a challenge. > > I have a fairly large investment in Elecraft equipment, in large part due to > their past excellent support. Do I need to rethink this? > - John, N0TA > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to n...@elecraft.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] [K3] Elecraft Support?
Give them a bit more time. Last week was a major holiday, and they are already overloaded as is. I am sure they will get back to you in the near future. And yes, the K3 is very much still supported. Jack, W6FB > On Dec 1, 2020, at 10:53 AM, John Reilly wrote: > > I have a problem with my K3s 100w PA: No power above 12w, and receive signals > are down 20 dB. I sent an email to "K3support" a week ago and haven't > received a reply. Is that email address still valid? So, I resent the email > to "support" yesterday -- no response. Has Elecraft stopped supporting the K3? > > To make matters worst, I downloaded the K3s Schematics, and the KPA3A > schematics (Rev C4?) do not match my Rev E PCB. This sure make > troubleshooting a challenge. > > I have a fairly large investment in Elecraft equipment, in large part due to > their past excellent support. Do I need to rethink this? > - John, N0TA > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to jackbrin...@me.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3, Elecraft Transverter K144XV-K
> My observations on most RF power amplifiers is that gain is higher at > lower drive levels so proportionally there is more output. e.g. full > drive =10w, half drive = 7w, quarter drive = 5w. You are describing classic compression in the amplifier [chain]. Where you have cascaded amplifiers, measure the Po/Pi slope *for each device* and adjust the relative gains/drive levels so that each device has a similar curve - or at least all begin to compress at the same level - and operate below the onset of compression. > Yet these amplifiers sound fine in SSB so must have good linearity. You can't say that. Non-linearity will show up first in IMD products *outside the SSB bandwidth* - your neighbors will hear the distortion before your QSO partner does or you hear it in your monitor. Now, there is no issue using these amplifiers in CW/RTTY/JT-mode as all of those modes are "one tone at a time" and do not generate significant IMD when feeding even a class C amplifier (transitions will become a bit sharper/more "clicky"). However in general, one should keep any *amplifier chain* used for "linear" modes (SSB, PSK31/63/125, etc.) below the 1 dB compression point. In other words, if 10W drive gives 750W output you should need any more than 25W for 1500W output. The 1 dB compression point is generally associated with IMD in the -33 to -35 dB range provided other issues (e.g. crossover distortion, bias stability, etc.) are well controlled. Ideally one would keep any gain compression well below 1 dB (20%) but that is often difficult with solid stage devices at high power levels - particularly since solid state devices tend to be rated for saturated mode (class C, pulse) outputs without regard for compression. 73, ... Joe, W4TV On 2015-01-08 12:03 PM, Edward R Cole wrote: David and Lexa, My observations on most RF power amplifiers is that gain is higher at lower drive levels so proportionally there is more output. e.g. full drive =10w, half drive = 7w, quarter drive = 5w. So one finds that an amplifier hits a minimum output with lowered drive that is not linear with change in drive level. Yet these amplifiers sound fine in SSB so must have good linearity. My 50w 2m transverter actually will produce nearly 60w with 1.5mw drive and 35w with 0.73 mw, but minimum output with 0.1mw is about 15w. I insert a 3-dB attenuator to get down to 7w output to drive my 150w amp to 55w which is the drive required for 1400w with my 2m-8877. I prefer this arrangement vs running the transverter near max at 55w when running digital modes (less heat stress on the transverter amp which also translates as less thermal frequency drift). My 25w 1296 transverter runs 20w at full output and about 8w with minimum drive. I've seen this consistently with RF power amplifiers (my HF amps operate similarly) 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: dubus...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3, Elecraft Transverter K144XV-K
David and Lexa, My observations on most RF power amplifiers is that gain is higher at lower drive levels so proportionally there is more output. e.g. full drive =10w, half drive = 7w, quarter drive = 5w. So one finds that an amplifier hits a minimum output with lowered drive that is not linear with change in drive level. Yet these amplifiers sound fine in SSB so must have good linearity. My 50w 2m transverter actually will produce nearly 60w with 1.5mw drive and 35w with 0.73 mw, but minimum output with 0.1mw is about 15w. I insert a 3-dB attenuator to get down to 7w output to drive my 150w amp to 55w which is the drive required for 1400w with my 2m-8877. I prefer this arrangement vs running the transverter near max at 55w when running digital modes (less heat stress on the transverter amp which also translates as less thermal frequency drift). My 25w 1296 transverter runs 20w at full output and about 8w with minimum drive. I've seen this consistently with RF power amplifiers (my HF amps operate similarly) 73, Ed - KL7UW http://www.kl7uw.com "Kits made by KL7UW" Dubus Mag business: dubus...@gmail.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 , Elecraft Transverter K144XV-K
Mine goes down to 1W which is the level I use now on my db6nt transverters. I initially used 3W (to simulate my IC202 power) but the db6nt IF pin diodes kept breaking Dave G4FRE -- Hello K3 owners ! Want to know the lowest power setting Elecraft internal 2 meter transv.( K144XV-K)??, know the max out is 8 to 10 watt approx... My DB6NT transverters ( IF 144 MHz) need 0,5 to 5 watt ,(IF power settings are adjustable in the DB6NT Transverter) 73' Viggo LA9NEA __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3, Elecraft Transverter K144XV-K
Jim (KG0KP) wrote: > I recall my range was about 4 watts, roughly 4 to 8 watts. > My need was for a max of 2 watts and that isn't going to happen. Hi Jim, At the time we designed this module, we were trying for maximum power output, and I'm sorry to say that we didn't attempt to ensure any particular minimum. Field testers for the unit were all asking for even higher power, and there was no discussion that I recall of an application for less. Even though the sales brochure and the manual for the K144XV only mention "maximum power output" and never make a claim for "minimum", I can see why you would expect less than 4 watts, given the available 10-to-1 drive range. There appears to be significant variance in results at minimum drive (0.1 mW), so I've asked the engineer who designed the unit to investigate. There are only a few factors that control power output and gain, so it could be that a very simple modification might be possible to increase the output range. I'll post the results of our investigation. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3, Elecraft Transverter K144XV-K
I too am very dissatisfied with my internal transverter and sent it to Elecraft to be "fixed". It returned with the comment that it was "operating as expected". I recall my range was about 4 watts, roughly 4 to 8 watts. My need was for a max of 2 watts and that isn't going to happen. I can't believe Elecraft would produce a product that is implied to operate from .1 to 10 watts and then say this is acceptable. It is only fair to believe that this product would operate accurately and precisely as the HF portion of this fine radio and all of their other excellent products. Sorry for being disgruntled but this is one option I am sorry I bought. 73, Jim KG0KP David> I have just measured my K144XV power output with an accurate power output meter and find that with the K3 set for 1mW the output is 10.5W. But setting the K3 to 0.1mW (fully counter-clockwise) the output goes down to only about 7W. No matter what I do, I am unable to reduce the power further. David> It will be interesting to see if other K144XV users find the same. Mine doesn't go below 6W as measured with the W2. -- Pierfrancesco Caci, ik5pvx __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to jimmil...@stl-online.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 , Elecraft Transverter K144XV-K
> "David" == David Pratt writes: David> I have just measured my K144XV power output with an accurate power output meter and find that with the K3 set for 1mW the output is 10.5W. But setting the K3 to 0.1mW (fully counter-clockwise) the output goes down to only about 7W. No matter what I do, I am unable to reduce the power further. David> It will be interesting to see if other K144XV users find the same. Mine doesn't go below 6W as measured with the W2. -- Pierfrancesco Caci, ik5pvx __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 , Elecraft Transverter K144XV-K
HI David, so my numbers: for 144.300MHz 0,1mW -> 2W out 1mW -> 9W for 146.100MHz (as I have I/F for 10GHz from 146MHz up) 0,1mW -> 1,3W 1mW -> 7W hope You did power calibration via K3 Utility whwre is also 1mW output calibration (I did ;-)) All the best and GL, 73! Lexa, OK1DST K3/100 #727 -- Původní zpráva -- Od: David Pratt Komu: Viggo Magnus Nilsen Datum: 7. 1. 2015 10:10:58 Předmět: Re: [Elecraft] K3 , Elecraft Transverter K144XV-K "I have just measured my K144XV power output with an accurate power output meter and find that with the K3 set for 1mW the output is 10.5W. But setting the K3 to 0.1mW (fully counter-clockwise) the output goes down to only about 7W. No matter what I do, I am unable to reduce the power further. It will be interesting to see if other K144XV users find the same. 73 de David G4DMP On 7 Jan 2015 04:20, Viggo Magnus Nilsen wrote: > > Hello K3 owners ! > > Want to know the lowest power setting Elecraft internal 2 meter transv.( K 144XV-K)??, know the max out is 8 to 10 watt approx... > > My DB6NT transverters ( IF 144 MHz) need 0,5 to 5 watt ,(IF power settings are adjustable in the DB6NT Transverter) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to alexandr.kobra...@seznam.cz" __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 , Elecraft Transverter K144XV-K
It might be safest to consider using a 3dB power attenuator on the input of the DB6NT transverter, then you don't have to worry about over driving it. There are some inexpensive 20 watt 3dB or 6 dB attenuators on eBay from China that would do, or you could use the smaller more expensive types that bolt onto a heat sink. If the DB6NT has a common RX/TX IF port then that loss on RX should not matter very much as the gain of the transverter should be high enough to overcome it. It also is better from a transmitted wideband noise point of view to do this, as just turning down the drive level to the 144MHz transverter by 3dB reduces the S/N of the transmitter output by that figure. 73 David Anderson GM4JJJ > On 7 Jan 2015, at 09:10, David Pratt wrote: > > I have just measured my K144XV power output with an accurate power output > meter and find that with the K3 set for 1mW the output is 10.5W. But setting > the K3 to 0.1mW (fully counter-clockwise) the output goes down to only about > 7W. No matter what I do, I am unable to reduce the power further. > > It will be interesting to see if other K144XV users find the same. > > 73 de David G4DMP > >> On 7 Jan 2015 04:20, Viggo Magnus Nilsen wrote: >> >> Hello K3 owners ! >> >> Want to know the lowest power setting Elecraft internal 2 meter transv.( >> K144XV-K)??, know the max out is 8 to 10 watt approx... >> >> My DB6NT transverters ( IF 144 MHz) need 0,5 to 5 watt ,(IF power settings >> are adjustable in the DB6NT Transverter) > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to gm4...@yahoo.co.uk __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 , Elecraft Transverter K144XV-K
I have just measured my K144XV power output with an accurate power output meter and find that with the K3 set for 1mW the output is 10.5W. But setting the K3 to 0.1mW (fully counter-clockwise) the output goes down to only about 7W. No matter what I do, I am unable to reduce the power further. It will be interesting to see if other K144XV users find the same. 73 de David G4DMP On 7 Jan 2015 04:20, Viggo Magnus Nilsen wrote: > > Hello K3 owners ! > > Want to know the lowest power setting Elecraft internal 2 meter transv.( > K144XV-K)??, know the max out is 8 to 10 watt approx... > > My DB6NT transverters ( IF 144 MHz) need 0,5 to 5 watt ,(IF power settings > are adjustable in the DB6NT Transverter) __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com
Re: [Elecraft] K3 - Elecraft K3 For Sale
The K3 is no longer for sale. Thanks Bob W6VY __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction
I learned Elecraftish from the K2. Had my fun with that for sure, as probably does everyone that comes from a Yakencom background. I also had a hard time first learning an FT1000MP, as I did an Orion. The K3 layout philosophy developed because Elecraft started with very small boxes that required that style of button and menu. It got sorted out over time and was the main evolution of the layout paradigm in use on the K3 which allowed it to be a small and as portable as it is now. They knew it was workable because it eased up on the K2 which they already knew was workable. It's easy to do big. It's a PITA to do small right. 73, Guy. On Wed, May 18, 2011 at 2:45 AM, Edward R. Cole wrote: > I think folks should realize something, here. Anytime you begin in a > new enterprise (like learning a new language, studying a new topic, > beginning a new class, ..or learning to operate a new piece of > equipment - aka the K3) you start out totally bewildered by the > subject. Depending on the complexity and maybe your lack of > background on the subject, the starting steps seem difficult and > confusing. But as you begin to learn, subsequent learning comes > easier as you build on what you have already learned. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction
I think folks should realize something, here. Anytime you begin in a new enterprise (like learning a new language, studying a new topic, beginning a new class, ..or learning to operate a new piece of equipment - aka the K3) you start out totally bewildered by the subject. Depending on the complexity and maybe your lack of background on the subject, the starting steps seem difficult and confusing. But as you begin to learn, subsequent learning comes easier as you build on what you have already learned. I found the process of becoming acquainted with the operation of the K3 fit this scenario, exactly. My first three weeks were hard and confusing until I began to learn the terminology and style of the system controls, then things picked up easier and more rapidly. The K3 is not the most complicated subject/device I have ever tried to master, but it is not the simplest, either. Anything worth mastering will likely take time. That is counter to the "Instant gratification" mood most have these days. So a wiki learning system may help, a good FAQ helps, reading the manual and trying out different settings helps, giving yourself time to learn - HELPS. What is nice about the K3 is it offers a challenge that extends beyond 15 or 30-minutes. It has capabilities that can make your experience interesting and fun for years. And since upgrades/improvements come regularly, there is no end to this. This is good! When life offers nothing new or interesting - then its time to change your life. I have many times over. I hope I never run out of new worlds to conquer and understand. Ham radio has provided this for me since I was 14-years old (1958). 73, Ed - KL7UW, WD2XSH/45 == BP40IQ 500 KHz - 10-GHz www.kl7uw.com EME: 50-1.1kW?, 144-1.4kw, 432-100w, 1296-testing*, 3400-? DUBUS Magazine USA Rep dubus...@hotmail.com == __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction) [End of thread]
I know this thread is ended, just want to make it clear I wasn't suggesting Elecraft was the one not giving support and wouldn't expect them too. 73 de M0XDF, K3 #174, P3 #108 -- Two things are infinite, the universe and human stupidity. But I'm not so sure about the universe. -- Albert Einstein. On 17 May 2011, at 19:36, Eric Swartz - WA6HHQ, Elecraft wrote: > Guys - right now we are maxed out getting ready for Dayton. We start flying > out tomorrow. > > We'll revisit this after we get back. Let's let the thread rest for now. > > 73, Eric WA6HHQ > List moderator > > > On 5/17/2011 10:45 AM, David Ferrington, M0XDF wrote: >> Lets not go that route again, there was one, it didn't get the support it >> deserved, it got dropped. >> I'll happy support it if someone puts the effort in, but I wouldn't want to >> see it dropped again. >> Beware - there are many pitfalls. >> >> 73 de M0XDF, K3 #174, P3 #108 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction) [End of thread]
Guys - right now we are maxed out getting ready for Dayton. We start flying out tomorrow. We'll revisit this after we get back. Let's let the thread rest for now. 73, Eric WA6HHQ List moderator On 5/17/2011 10:45 AM, David Ferrington, M0XDF wrote: > Lets not go that route again, there was one, it didn't get the support it > deserved, it got dropped. > I'll happy support it if someone puts the effort in, but I wouldn't want to > see it dropped again. > Beware - there are many pitfalls. > > 73 de M0XDF, K3 #174, P3 #108 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction
The old Wiki site was run by one guy as a volunteer. He was somewhat proprietary with how it was run as I recall. I think Alexander and I are suggesting that Elecraft would have to support and administer the site while also accepting input from users. It does not have to be on Wiki. It could be supported directly from the Elecraft website or some other online resource. Again, check out the fine online resources at the N1MM website as an example. You could supplement online text and photos with embedded instruction videos to help beginners and experts learn and master new features and functions. Dave, N4QS Sent via BlackBerry by AT&T -Original Message- From: "David Ferrington, M0XDF" Sender: elecraft-boun...@mailman.qth.net Date: Tue, 17 May 2011 18:45:29 To: Elecraft K3 Cc: elecraft@mailman.qth.net Reflector Subject: Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction Lets not go that route again, there was one, it didn't get the support it deserved, it got dropped. I'll happy support it if someone puts the effort in, but I wouldn't want to see it dropped again. Beware - there are many pitfalls. 73 de M0XDF, K3 #174, P3 #108 -- Do not meddle in the affairs of Dragons, For you are crunchy and taste good with ketchup! On 17 May 2011, at 18:14, Elecraft K3 wrote: > > On May 17, 2011, at 9:12 AM, Alexander Sack wrote: > > What a terrific idea! I seldom post in here -- I find it all a little too > intimidating for a guy that doesn't come from a technical background. I do > make use of the search function, but a fully hyperlinked wiki would be > awesome. Might distribute some of the burden of the task to people who have > the time to contribute. It also might help guys like me separate the wheat > from the chaff, so to speak on the reflector posts. > > 73 de Eric, KG6MZS > >> What you do need is an Elecraft Wiki where you can leverage the >> strong/knowledgeable/enthusiastic customer base to generate helpful >> content in addition to this list. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction
The Elecraft owners' database is still running. This was part of the Wiki web site. Although it was originally set up for K1 & K2 owners, many of us with the K3 and XV transverters, etc, keep our entries up to date. http://www.zerobeat.net/qrp/elowners.html 73 de David G4DMP In a recent message, "David Ferrington, M0XDF" writes > >Lets not go that route again, there was one, it didn't get the support >it deserved, it got dropped. >I'll happy support it if someone puts the effort in, but I wouldn't >want to see it dropped again. -- + - - - - - - - - - - - - - - - - + | David M Pratt, Kippax, Leeds. | | Website: http://www.g4dmp.co.uk | + - - - - - - - - - - - - - - - - + __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction
On Tue, May 17, 2011 at 1:45 PM, David Ferrington, M0XDF wrote: > Lets not go that route again, there was one, it didn't get the support it > deserved, it got dropped. > I'll happy support it if someone puts the effort in, but I wouldn't want to > see it dropped again. > Beware - there are many pitfalls. > For sure. But that doesn't make it a bad idea. Was this a site officially sanctioned by Elecraft or something you started a while back? Can you elaborate on why it failed? 73 -aps __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction
Lets not go that route again, there was one, it didn't get the support it deserved, it got dropped. I'll happy support it if someone puts the effort in, but I wouldn't want to see it dropped again. Beware - there are many pitfalls. 73 de M0XDF, K3 #174, P3 #108 -- Do not meddle in the affairs of Dragons, For you are crunchy and taste good with ketchup! On 17 May 2011, at 18:14, Elecraft K3 wrote: > > On May 17, 2011, at 9:12 AM, Alexander Sack wrote: > > What a terrific idea! I seldom post in here -- I find it all a little too > intimidating for a guy that doesn't come from a technical background. I do > make use of the search function, but a fully hyperlinked wiki would be > awesome. Might distribute some of the burden of the task to people who have > the time to contribute. It also might help guys like me separate the wheat > from the chaff, so to speak on the reflector posts. > > 73 de Eric, KG6MZS > >> What you do need is an Elecraft Wiki where you can leverage the >> strong/knowledgeable/enthusiastic customer base to generate helpful >> content in addition to this list. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Wiki (was Noise reduction
On May 17, 2011, at 9:12 AM, Alexander Sack wrote: What a terrific idea! I seldom post in here -- I find it all a little too intimidating for a guy that doesn't come from a technical background. I do make use of the search function, but a fully hyperlinked wiki would be awesome. Might distribute some of the burden of the task to people who have the time to contribute. It also might help guys like me separate the wheat from the chaff, so to speak on the reflector posts. 73 de Eric, KG6MZS > What you do need is an Elecraft Wiki where you can leverage the > strong/knowledgeable/enthusiastic customer base to generate helpful > content in addition to this list. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft[K-3] K144XV
I know this - so does everyone. I have actually read the manual. However, there is only one TX inhibit and it is shared with the K3 on signal, which I happen to be using. Even if I was not using it the inhibit might easily be set to the default K3 ON and be ignored. Perhaps one of the DIGOUT lines could be used, but it would be better to have a longer delay and a seperate 2m PTT output. Don Wilhelm-4 wrote: > > The K3 has a TX INHibit input on the ACC connector that will inhibit RF > for any length of time you desire. Drive it with an output from your > sequencer that indicates "sequence completed". See the manual for > details. > > 73, > Don W3FPR > > Jo > -- View this message in context: http://n2.nabble.com/Elecraft-K-3-K144XV-tp4267790p4273831.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft[K-3] K144XV
The K3 has a TX INHibit input on the ACC connector that will inhibit RF for any length of time you desire. Drive it with an output from your sequencer that indicates "sequence completed". See the manual for details. 73, Don W3FPR John Lemay wrote: > It looks like "TX Delay" is variable from 8 to 20mS. Perhaps this range > could be increased in the software ? > > John G4ZTR > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Giulio Pico - IW3HVB > Sent: 08 January 2010 09:23 > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Elecraft[K-3] K144XV > > IMHO an external sequencer is still the best way to have a foolproof > system. Running QRO with a mast mounted lna isn't a good idea if you > don't have one. 20 ms is not enough for sure, as most of the QRO coax > relays have a switching time of that amount or even more > My sequence timing is around 250 ms, in four steps, including LNA, PA, > Driver, and RTX/XVTR. > > 73 de Giulio IW3HVB > > AD6XY ha scritto: > >> snip >> >> I am still worried about the diode switching, 2m specific PTT outputs and >> delays. I assume the usual 20mS delay option is there in the menu like all >> the other bands. This is not quite long enough when you are sequencing an >> amplifier and a pre-amp as there is more to switch than just the coaxial >> relays. >> >> > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > __ Information from ESET NOD32 Antivirus, version of virus signature > database 4752 (20100107) __ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > > > __ Information from ESET NOD32 Antivirus, version of virus signature > database 4752 (20100107) __ > > The message was checked by ESET NOD32 Antivirus. > > http://www.eset.com > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.725 / Virus Database: 270.14.129/2605 - Release Date: 01/07/10 > 02:35:00 > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft[K-3] K144XV
David, Wayne said: "It's actually more like -144 dBm (500-Hz bandwidth)." I assume that this refers to a K144XV installed in a K3. This equates to a noise figure of 3db. To achieve a lower noise figure, the gain used in the K144XV would have to be greater, which would further reduce the overall dynamic range (IMDDR3) of the K3 assembly on 2m. 73, Geoff GM4ESD David Pratt wrote on Friday, January 08, 2010 at 9:34 AM > In a recent message, AD6XY wrote ... >>I can not see any reference to noise figure in the brochure. Just MDS and >>FM >>sensitivity with no bandwidth. > > The manual gives this as "1dB nominal". > > See > http://www.elecraft.com/manual/K144XV%20Manual%20A3.pdf > > 73 > -- > David G4DMP/G3KEP > Leeds, UK __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft[K-3] K144XV
It looks like "TX Delay" is variable from 8 to 20mS. Perhaps this range could be increased in the software ? John G4ZTR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Giulio Pico - IW3HVB Sent: 08 January 2010 09:23 To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Elecraft[K-3] K144XV IMHO an external sequencer is still the best way to have a foolproof system. Running QRO with a mast mounted lna isn't a good idea if you don't have one. 20 ms is not enough for sure, as most of the QRO coax relays have a switching time of that amount or even more My sequence timing is around 250 ms, in four steps, including LNA, PA, Driver, and RTX/XVTR. 73 de Giulio IW3HVB AD6XY ha scritto: > snip > > I am still worried about the diode switching, 2m specific PTT outputs and > delays. I assume the usual 20mS delay option is there in the menu like all > the other bands. This is not quite long enough when you are sequencing an > amplifier and a pre-amp as there is more to switch than just the coaxial > relays. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Information from ESET NOD32 Antivirus, version of virus signature database 4752 (20100107) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Information from ESET NOD32 Antivirus, version of virus signature database 4752 (20100107) __ The message was checked by ESET NOD32 Antivirus. http://www.eset.com __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft[K-3] K144XV
In a recent message, AD6XY wrote ... >I can not see any reference to noise figure in the brochure. Just MDS and FM >sensitivity with no bandwidth. The manual gives this as "1dB nominal". See http://www.elecraft.com/manual/K144XV%20Manual%20A3.pdf 73 -- David G4DMP/G3KEP Leeds, UK -- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft[K-3] K144XV
IMHO an external sequencer is still the best way to have a foolproof system. Running QRO with a mast mounted lna isn't a good idea if you don't have one. 20 ms is not enough for sure, as most of the QRO coax relays have a switching time of that amount or even more My sequence timing is around 250 ms, in four steps, including LNA, PA, Driver, and RTX/XVTR. 73 de Giulio IW3HVB AD6XY ha scritto: > snip > > I am still worried about the diode switching, 2m specific PTT outputs and > delays. I assume the usual 20mS delay option is there in the menu like all > the other bands. This is not quite long enough when you are sequencing an > amplifier and a pre-amp as there is more to switch than just the coaxial > relays. > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft[K-3] K144XV
I can not see any reference to noise figure in the brochure. Just MDS and FM sensitivity with no bandwidth. When I get mine I will measure the noise figure on a test set. It is likely to be under 2dB and I will use a low ENR head! I suspect like the XV144, the K144XV will need some gain reduction for use with a masthead pre-amp. Signals at the antenna of -30 dBm are not unknown around here resulting in milliwatts at the mixer but the time you add in 20 dB of preamp plus another 20dB of conversion gain. I am still worried about the diode switching, 2m specific PTT outputs and delays. I assume the usual 20mS delay option is there in the menu like all the other bands. This is not quite long enough when you are sequencing an amplifier and a pre-amp as there is more to switch than just the coaxial relays. When used as an IF for microwaves it will need even longer to allow a waveguide switch to operate but this will be mitigated by the split TX/RX outputs and the low power 2m interface. Where does this come out? Mike -- View this message in context: http://n2.nabble.com/Elecraft-K-3-K144XV-tp4267790p4271265.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft
Hello Paul, Just for this situation it's not a blessing to hear that high. I'm still able to hear up to 21 Kc (it was 28 Kc about 15 years ago). So I'm looking forward for this LPF board! I'll contact Elecraft and see if that will do the job. I'll try the Elco's and see what the result will be. Thanks for the reply! 73's, Evert -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of pd0psb Sent: Sunday, November 08, 2009 21:57 To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Elecraft Evert, There's a small LPF board in betatest phase which cuts off anything above K3's passband. May be you can ask Elecraft to test a sample. Especially people with good hearing (congrats, you are an exeption nowadays :-) can benefit form this board. It's a 24db/oct chebychev with low noise opamp that doesnt have any coloration in-passband. As a quick solution you could also try 2 elco's over the HP outputs, I tried 4,7 or 10uF. This will give a 6db/oct roll off. I've read the LPF filterboard might become generally available someday for people wishing to clear the above-passband products. 73' Paul PD0PSB __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft
Evert, There's a small LPF board in betatest phase which cuts off anything above K3's passband. May be you can ask Elecraft to test a sample. Especially people with good hearing (congrats, you are an exeption nowadays :-) can benefit form this board. It's a 24db/oct chebychev with low noise opamp that doesnt have any coloration in-passband. As a quick solution you could also try 2 elco's over the HP outputs, I tried 4,7 or 10uF. This will give a 6db/oct roll off. I've read the LPF filterboard might become generally available someday for people wishing to clear the above-passband products. 73' Paul PD0PSB Evert Bakker (PA2KW) wrote: > > Hi Tom, > > --- Good headphones designed for communications shouldn't even go that > high. --- > > May be you are (should be) correct. But my Heil Pro does as I do hear > these > high tones coming through. > > Just an example; when using SSB (MON =2) 30% of the time I clearly hear a > "tune" of high frequency (must be somewhere around 16 Kc if I compare it > with the line transformers in old TV sets) when in TX mode. It looks like > a > lottery when pushing the PTT, it's there or not. > > In an earlier message (must be months ago) I stated that I do hear high > frequency components on each signal (SSB and CW) which is above S3 and > they > are related to the signals received. > The high component which I'm talking about can't be influenced (volume and > tone) by the RX-EQ so it looks like an uncontrolled side-effect. > > So my conclusion; > It's either coming from the K3 and totally independent from the headphones > used, or it's the combination K3 - Heil Pro set, or it's an oscillation > between my ears initiated by lids on the band (don't take the last one to > serious). > > (un)fortunately most hams can't hear above 10 Kc if we look at the average > age and the given statistics. So they won't notice these artifacts. > > Yes I do have an old headphone (no mic included) from Telex which doesn't > produce or show this effect. Either the combi K3 - Telex doesn't generate > the high frequency components or the Telex isn't able to make it audible. > > With this knowledge, and your question about the Heil I can do two things: > Say nothing or warn you just in case you are able to hear above 10 Kc. > > > BTW > Let me be clear, I do have 2 K3's, (SN0812 & SN2185, both have the same > issue) but I'm still very happy with them! Receiver performance and audio > are the most important points for me, not the bells and the whistles. I > hope > this audio issue will be solved once and the K3 will be perfect (for me). > Some issues will be solved, some never. Nothing is perfect, but the K3 > comes > close. > > Do whatever you like with this information, it is just my experience and > opinion > > 73's, Evert PA2KW > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > -- View this message in context: http://n2.nabble.com/M1-M4-Quick-memories-tp3925899p3969775.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft
Larry, If your ProSet has the HC-5 element, it is NOT a ProSet K2. The ProSet K2 is only sold through Elecraft AFAIK. ALL ProSet K2s have an electret element. That is why you need bias turned on in the K3 and for the K2 the bias resistor at the microphone jack is needed. All ProSets work nicely with the K3. If it is the ProSet K2 or the ProSet iC, then bias needs to be on, but for the others bias should be off. They can be plugged into the front mic jack with a Kenwood adapter, or plugged into the rear panel jacks with no adapter required. 73, Don W3FPR N1JM wrote: > I have an older Pro Set K2 which I 'm quite certain has a Heil HC5 element in > it. I noticed the new one has a iC element. I dont think there is anything > special about it other than the mic adapter is wired for the Elecraft front > panel, otherwise it's a Pro Set. On the K3, you can plug the mic/headset > connectors directly in the back without an adapter. > > > > Larry - K2GN wrote: > >> My Heil Pro Set is old and getting beatup. >> I'm beenn going to sent it to the Heil Hospital to get it refur'ed' >> But then I saw the Pro Set K2 on the web site. >> Any body using one on a K3, as well? >> Thanks in advance. >> >> de K2GN/Larry >> K3 - S/N 3278 >> > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft
I have an older Pro Set K2 which I 'm quite certain has a Heil HC5 element in it. I noticed the new one has a iC element. I dont think there is anything special about it other than the mic adapter is wired for the Elecraft front panel, otherwise it's a Pro Set. On the K3, you can plug the mic/headset connectors directly in the back without an adapter. Larry - K2GN wrote: > > My Heil Pro Set is old and getting beatup. > I'm beenn going to sent it to the Heil Hospital to get it refur'ed' > But then I saw the Pro Set K2 on the web site. > Any body using one on a K3, as well? > Thanks in advance. > > de K2GN/Larry > K3 - S/N 3278 > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > -- View this message in context: http://n2.nabble.com/M1-M4-Quick-memories-tp3925899p3965397.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] [elecraft] K3 Beta Firmware Rev. 3.41: Improved RX bass response; Flat DATA-mode EQ; "Live" memory recall; etc.
On Wed, 7 Oct 2009 10:06:22 -0700 (PDT), Paul - WW2PT wrote: > >You could be wrong. ;-) That's what I said > >You're making a pretty definitive statement based on 24+ year-old >experiences. A lot has changed since then for both Mac and Windows >platforms. Are you still developing for DOS 3.0? Windows 1.0? No, actually I program with .NET C# 3.5, MS SQL Server and IIS 6.0 and many other MS products. However you might be interested to know that the hourly rate for Quick Basic programmers was $125 per hour last time I had an offer for a contract updating one of those applications. We are getting scarce and many like me just don't want to go through the hassle of it. > >Not trying to fan a Mac/Win flame war, but if you can't find quality, >inexpensive (or free) development tools for OS X, you're not looking very >hard. I have no reason to look for it, so I wouldn't know that, and I'm not going to participate in this discussion any further on the reflector. It's way off topic... > >73! >Paul WW2PT [snip] Tom, N5GE n...@n5ge.com K3 #806, K3 #1055, PR6, XV144, XV432, KRC2, W1 and other small kits. 2 W2's on order 1 K144XV on order http://www.n5ge.com http://www.swotrc.net __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] [elecraft] K3 Beta Firmware Rev. 3.41: Improved RX bass response; Flat DATA-mode EQ; "Live" memory recall; etc.
You could be wrong. ;-) You're making a pretty definitive statement based on 24+ year-old experiences. A lot has changed since then for both Mac and Windows platforms. Are you still developing for DOS 3.0? Windows 1.0? Not trying to fan a Mac/Win flame war, but if you can't find quality, inexpensive (or free) development tools for OS X, you're not looking very hard. 73! Paul WW2PT Radio Amateur N5GE wrote: > > > You're experiencing why I stopped using Apple Computers and developing > software for them in 1985. > > They are good computers but Apple does not make it easy for developers > to create software for their computers (very expensive development > tools). That caused x86 and x64 based computer sales overwhelmed > Apple sales as time went by. > > My opinion. I could be wrong. > > Tom, N5GE > > -- View this message in context: http://n2.nabble.com/K3-Beta-Firmware-Rev-3-41-Improved-RX-bass-response-Flat-DATA-mode-EQ-Live-memory-recall-etc-tp3773055p3783137.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft OT - Lightning Protection
Bill, Thanks you for your reply to my question. I agree with you the the disconnection outside the shack is a good idea. There have been a wide variety of answers to this question and after researching this question myself I was curious as to which most hams were doing. I have received many replies to this question and I would like to thank everyone who responded. I asked that the replies be to my email address only because of some of the sharp criticizism that some of the off topic subjects drew. Also as I don't repond to many topics I failed to remember being able to reply by email button. I'm bad. Thanks to everyone again who responded. Have a good weekend. Best 73, Len K3LJ -Original Message- From: "Bill W4ZV (via Nabble)" Sent: May 29, 2009 6:58 AM To: "Len, K3LJ" Subject: Re: Elecraft OT - Lightning Protection The most economical and most effective lightning protection is to simply disconnect *ALL* cables (preferably outside the shack) and disconnect *ALL* equipment power cords from the wall when lightning is in the vicinity. I also have a whole house surge suppressor on my power service and use quick disconnect trailer hitch connectors for my control cables. I have a 180' tower that is the highest structure for miles around and have never had any internal damage from lightning in 14 years at this QTH. I've also learned to become my own lightning forecaster using websites like the following: http://www.uspln.com/index2.html (my favorite...touch the bottom of the map) http://thunderstorm.vaisala.com/explorer.html http://www.weather.com/maps/activity/golf/uslightningstrikes_large.html 73, Bill This email is a reply to your post @ http://n2.nabble.com/Elecraft-OT---Lightning-Protection-tp2991231p2993247.html You can reply by email or by visting the link above. -- View this message in context: http://n2.nabble.com/Elecraft-OT---Lightning-Protection-tp2991231p2996204.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft OT - Lightning Protection
-Original Message- From: "Bill W4ZV (via Nabble)" Sent: May 29, 2009 6:58 AM To: "Len, K3LJ" Subject: Re: Elecraft OT - Lightning Protection The most economical and most effective lightning protection is to simply disconnect *ALL* cables (preferably outside the shack) and disconnect *ALL* equipment power cords from the wall when lightning is in the vicinity. I also have a whole house surge suppressor on my power service and use quick disconnect trailer hitch connectors for my control cables. I have a 180' tower that is the highest structure for miles around and have never had any internal damage from lightning in 14 years at this QTH. I've also learned to become my own lightning forecaster using websites like the following: http://www.uspln.com/index2.html (my favorite...touch the bottom of the map) http://thunderstorm.vaisala.com/explorer.html http://www.weather.com/maps/activity/golf/uslightningstrikes_large.html 73, Bill This email is a reply to your post @ http://n2.nabble.com/Elecraft-OT---Lightning-Protection-tp2991231p2993247.html You can reply by email or by visting the link above. -- View this message in context: http://n2.nabble.com/Elecraft-OT---Lightning-Protection-tp2991231p2996158.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft OT - Lightning Protection
The most economical and most effective lightning protection is to simply disconnect *ALL* cables (preferably outside the shack) and disconnect *ALL* equipment power cords from the wall when lightning is in the vicinity. I also have a whole house surge suppressor on my power service and use quick disconnect trailer hitch connectors for my control cables. I have a 180' tower that is the highest structure for miles around and have never had any internal damage from lightning in 14 years at this QTH. I've also learned to become my own lightning forecaster using websites like the following: http://www.uspln.com/index2.html (my favorite...touch the bottom of the map) http://thunderstorm.vaisala.com/explorer.html http://www.weather.com/maps/activity/golf/uslightningstrikes_large.html 73, Bill -- View this message in context: http://n2.nabble.com/Elecraft-OT---Lightning-Protection-tp2991231p2993247.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft OT - Lightning Protection
Len, I am not certain why you want only off reflector replies. I would think this would be a suitable subject for general interest, and related to the protection of Elecraft equipment. Lightning Protection done correctly can be very involved. It consists of a grounding scheme of many large copper wires and ground stakes covering a large area to dissipate a lightning surge over a large area of the earth. Perimeter ground wires around any building and radial ground wires (not to be confused with a radial field for a vertical) having several ground rods at intervals connected to the ground wire and a ground rod any place where he ground wire makes a change in direction are important considerations. As for the shack entry point, running *all* connections coming into the shack (power, telco, ethernet, and antennas) through a single "grounding window" is important for lightning protection considerations. The minor consideration included in a lightning protection system is the surge protectors on feedlines and all other lines (power, telco, ethernet, rotator and control lines) coming into the shack. I use Polyphaser surge protectors on the coax feedlines at the point of entry to the building and also at the shack grounding window. Other lines are protected by MOVs at both points, and the power to the shack runs through TrippLite suppressors. Yes, I have the perimeter wires around the buildings on the property and I have 3 radial wires running from each mast or tower - buried 1 to 2 feet under the ground and connected to driven ground rods at intervals. I have implemented reasonable lightning protection - I had the opportunity to install it when the house was being built and the antenna field was being developed. Still, I do not trust it for full protection - My antennas are grounded when not in use and any equipment in the shack is connected to a dummy load. For additional information about lightning protection, see the PolyPhaser website. Ron Block wrote a good 2 part article on the subject in QST 5 or 6 years ago. Much of the information about the design of my protection system came from those articles. 73, Don W3FPR Len, K3LJ wrote: > I know this is an off topic subject and would like information on what people > are using for lightning protection on their feed lines and rotor cables. I > would like you to reply off line to my email address - k...@arrl.net. > > Thanks in advance to those who reply. > > 73, Len K3LJ > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft Case Screws
We're looking into this.
73,
Wayne
N6KR
S Sacco wrote:
> What about it, Eric? How about a "K3SS" ("SS" for stainless screws
> :-) )
> model?
---
http://www.elecraft.com
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Re: [Elecraft] [K3] Elecraft Case Screws
When I see as many posts about a single subject as I see on this one, with
as simple as answer as is available, IMHO it's time for Elecraft to step up,
and use stainless steel screws.
Not everyone operates in low humidity or air conditioned environments, and
the cost, especially in the quantities Elecraft orders them, would be
nominal to say the least.
What about it, Eric? How about a "K3SS" ("SS" for stainless screws :-) )
model?
73,
Steve
NN4X
(who may have a screw or two loose, but none are rusted...)
On Tue, May 26, 2009 at 6:50 AM, Johnny Siu wrote:
> Hi,
>
> The case screws rusted as well in my K3. Elecraft has sent me replacement
> screws.
>
[SNIP]
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Re: [Elecraft] [K3] Elecraft Case Screws
Hi, The case screws rusted as well in my K3. Elecraft has sent me replacement screws. The quality the case screws needed to be addressed. I trust good quality case screws would not cause Elecraft too much costs. 73 Johnny VR2XMC --- 2009年5月26日 星期二，davidvk...@virginbroadband.com.au 寫道﹕ 寄件人: davidvk...@virginbroadband.com.au 主題: [Elecraft] [K3] Elecraft Case Screws 收件人: elecraft@mailman.qth.net 日期: 2009年5月26日,星期二,上午10:25 Timely thread, I was just thinking last night that I should replace mine, as they are all rusted. Ambient temp here varies from about 5繙C to 35繙C with potential high humidity, and we are only a couple of hundred metres from a salt water lake. If anyone comes up with a permanent fix, I'd be interested to hear of it (I'd prefer not to have to colour them in every-time I opened up the radio!). Cheers David, VK2NU Yahoo!香港提供網上安全攻略，教你如何防範黑客! 請前往 http://hk.promo.yahoo.com/security/ 了解更多! __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft Case Screws
This sounds like you are damaging the screws slightly when you loosen/ tighten them? Presumably, before they started rusting, the bare metal was shining through the black? If that is the case (sorry, no pun intended), then I suggest you don't have a good Philips #1 screwdriver and its 'caming' out a little! Although the paint has come off my holes in places, the screws are just fine. The screw should be a real snug fit on the driver, I can pick screws up with mine and it's not magnetic. 73 de M0XDF, K3 #174 -- The lame man who keeps the right road outstrips the runner who takes a wrong one. The more active and swift the latter is, the further he will go astray. -Francis Bacon, essayist, philosopher, and statesman (1561-1626) On 26 May 2009, at 03:25, wrote: > Timely thread, I was just thinking last night that I should replace > mine, > as they are all rusted. > > Ambient temp here varies from about 5ºC to 35ºC with potential high > humidity, and we are only a couple of hundred metres from a salt water > lake. > > If anyone comes up with a permanent fix, I'd be interested to hear > of it > (I'd prefer not to have to colour them in every-time I opened up the > radio!). __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Utility and second receiver
This is correct. The buttons will be disabled if the CONFIG:KRX3 option is disabled. See the K3 Utility Help page on the Crystal Filter Configuration dialog, under the heading "Main and Sub Receiver". 73 de Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Iain MacDonnell - N6ML Sent: Monday, May 11, 2009 11:56 AM To: Erik N Basilier Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3: Elecraft Utility and second receiver Erik N Basilier wrote: > I installed the second receiver recently, and am totally addicted to the diversity reception. Using my R5 vertical as the second antenna, with my horizontal beam for the main. The R5 is of course useless as a transmit antenna on 40, but it picks up enough signal for receive (no tuner on it). Haven't put any extra roofing filters in the second receiver, and with the lower received signal strength on the vertical I doubt that I will need to. > > Now to my question: The Utility happily loaded the DSP firmware into the second receiver, but I didn't see how to set up the roofing filter configuration from the Utility, so I did it using the radio's menus. Surely I am missing something in the Utility? (Running the latest Utility and the latest firmware.) There should be a radio buttons in the bottom-left corner of the Cyrstal Filter COnfiguration dialog that allow you to select "Main" or "Sub Receiver"... ? ~Iain / N6ML __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3: Elecraft Utility and second receiver
Erik N Basilier wrote: > I installed the second receiver recently, and am totally addicted to the > diversity reception. Using my R5 vertical as the second antenna, with my > horizontal beam for the main. The R5 is of course useless as a transmit > antenna on 40, but it picks up enough signal for receive (no tuner on it). > Haven't put any extra roofing filters in the second receiver, and with the > lower received signal strength on the vertical I doubt that I will need to. > > Now to my question: The Utility happily loaded the DSP firmware into the > second receiver, but I didn't see how to set up the roofing filter > configuration from the Utility, so I did it using the radio's menus. Surely I > am missing something in the Utility? (Running the latest Utility and the > latest firmware.) There should be a radio buttons in the bottom-left corner of the Cyrstal Filter COnfiguration dialog that allow you to select "Main" or "Sub Receiver"... ? ~Iain / N6ML __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
I would say that you don't really need all those filters. The DSP filter does all the heavy lifting except for removing the artifacts from signals that are inside the pass band of the roofing filter. I have the 2.7k, 500 Hz and 250 Hz in my main receiver and just the 2.7K and 500 Hz in my second receiver. I don't feel the need for more, but I have zero interest in FM, AM and ESSB. Willis 'Cookie' Cooke K5EWJ --- On Fri, 2/6/09, Kjeld Holm wrote: > From: Kjeld Holm > Subject: Re: [Elecraft] [K3] Elecraft roofing filters > To: elecraft@mailman.qth.net > Date: Friday, February 6, 2009, 12:31 AM > Dear all, > > Once and again: Thanks to all for very interesting and > informative answers. > > Right now my conclusion according to my planed way of > operation is the > following setup > > 2 pcs KFL3A-2.8_2.7sw replacement K3 and KRX3 > 2 pcs KFL3A-1.8K SSB > 2 pcs KFL3A-200 5-pole CW + matching > 2 pcs KFL3A-400 CW > 2 pcs KFL3B-FM FM > > For the purpose of working as many DXCC countries as > possible including > picking new ones during contests on crowded bands. > > As I understand this configuration will not allow me to > receive or transmit > on AM but it will maybe allow ESSB later if the firmware > can be modified to > use the FM filter for ESSB. > > Any further comments before my ordering will be > appreciated. > > Vy 73 > OZ1CCM Kjeld > > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of > Kjeld Holm > Sent: 5. februar 2009 17:27 > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Elecraft roofing filters > > Dear all, > > Thanks for all the kind answers. > > Sorry for all that fuss. Somehow I mixed up everything so I > ended up > thinking of some nonsense like 1.0 kHz for SSB. :-o > > I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for > SSB. And also > filters for AM and FM. > > Vy 73 > OZ1CCM Kjeld > > > > -Original Message- > From: W0MU Mike Fatchett [mailto:w...@w0mu.com] > Sent: 5. februar 2009 15:28 > To: 'Kjeld Holm' > Subject: RE: [Elecraft] [K3] Elecraft roofing filters > > They are available on the website. > > KFL3A-1.0K 1 kHz, 8-pole roofing filter 125.95 > > I have one in my K3 but I don't use it too much. You > might want to use it > over a 250 or 500 filter to listen to a pile up so you can > hear if the > station is working people above or below his frequency. I > have listened to > SSB a bit on the filter and while very narrow for SSB you > can hear the > station. > > The better question might be, what modes do you like to > operate? I am about > to order a second K3 and I was going to go with the > following filters. 2.8 > replacing the stock 2.7/ AM/ FM/ 400 or 500 and 250. If > you never play to > transmit on AM or want to do ESSB or FM those slots would > be available. The > K3 I have now has the 2.7 which is being replaced with the > 2.8/1.8/1.0/400/200 in the main rcv, 2.8/400 in the sub. > > Mike W0MU > > "A slip of the foot you may soon recover, but a slip > of the tongue you may > never get over." Ben Franklin -Original > Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of > Kjeld Holm > Sent: Thursday, February 05, 2009 5:44 AM > To: 'ElecraftList' > Subject: [Elecraft] [K3] Elecraft roofing filters > > Dear all, > > In the "Roofing Filter Notes from Wayne and Eric" > link on the Order page I > see the two sentences: "Add narrower/wider filters as > you prefer. I like to > use the 1.0 kHz crystal filter when tuning a crowded band > or listening to a > pile up." > > Can anyone point me to a place that can tell me what > "the 1.0 kHz crystal > filter" is, where to obtain one and when it is worth > using? > > Vy 73 > OZ1CCM Kjeld > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: > http://www.qsl.net/donate.html > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:Elecraft@mailman.qth.net > > This list hosted by: http://www.qsl.net > Please help support this email list: > http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
> Right now my conclusion according to my planed way of > operation is the following setup > > 2 pcs KFL3A-2.8_2.7sw replacement K3 and KRX3 > 2 pcs KFL3A-1.8K SSB > 2 pcs KFL3A-200 5-pole CW + matching > 2 pcs KFL3A-400 CW > 2 pcs KFL3B-FM FM Having done the 2 x KFL3A-2.8_2.7sw replacement, I am not convinced that there is enough (any) performance gain to justify the significant cost. As others have commented, you probably don't need the extra FM, 1.8K and 200 Hz filters in the subreceiver. However, with the soon to be released independent band operation, the FM filter might be worthwhile to permit SWL or other general purpose listening. > As I understand this configuration will not allow me to > receive or transmit on AM but it will maybe allow ESSB later > if the firmware can be modified to use the FM filter for ESSB. The FM filter will allow you to receive AM but not transmit at the present time. With the concern for transmit image rejection when using the FM filter in AM or ESSB, there is no reason that the filter could not be offset to place the image well down the skirt when transmitting if the skirts are marginal with the signal centered. 73, ... Joe, W4TV > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm > Sent: Friday, February 06, 2009 3:32 AM > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Elecraft roofing filters > > > Dear all, > > Once and again: Thanks to all for very interesting and > informative answers. > > Right now my conclusion according to my planed way of > operation is the following setup > > 2 pcs KFL3A-2.8_2.7sw replacement K3 and KRX3 > 2 pcs KFL3A-1.8K SSB > 2 pcs KFL3A-200 5-pole CW + matching > 2 pcs KFL3A-400 CW > 2 pcs KFL3B-FM FM > > For the purpose of working as many DXCC countries as possible > including picking new ones during contests on crowded bands. > > As I understand this configuration will not allow me to > receive or transmit on AM but it will maybe allow ESSB later > if the firmware can be modified to use the FM filter for ESSB. > > Any further comments before my ordering will be appreciated. > > Vy 73 > OZ1CCM Kjeld > > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm > Sent: 5. februar 2009 17:27 > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Elecraft roofing filters > > Dear all, > > Thanks for all the kind answers. > > Sorry for all that fuss. Somehow I mixed up everything so I > ended up thinking of some nonsense like 1.0 kHz for SSB. :-o > > I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. > And also filters for AM and FM. > > Vy 73 > OZ1CCM Kjeld > > > > -Original Message- > From: W0MU Mike Fatchett [mailto:w...@w0mu.com] > Sent: 5. februar 2009 15:28 > To: 'Kjeld Holm' > Subject: RE: [Elecraft] [K3] Elecraft roofing filters > > They are available on the website. > > KFL3A-1.0K 1 kHz, 8-pole roofing filter 125.95 > > I have one in my K3 but I don't use it too much. You might > want to use it over a 250 or 500 filter to listen to a pile > up so you can hear if the station is working people above or > below his frequency. I have listened to SSB a bit on the > filter and while very narrow for SSB you can hear the station. > > The better question might be, what modes do you like to > operate? I am about to order a second K3 and I was going to > go with the following filters. 2.8 replacing the stock 2.7/ > AM/ FM/ 400 or 500 and 250. If you never play to transmit on > AM or want to do ESSB or FM those slots would be available. > The K3 I have now has the 2.7 which is being replaced with > the 2.8/1.8/1.0/400/200 in the main rcv, 2.8/400 in the sub. > > Mike W0MU > > "A slip of the foot you may soon recover, but a slip of the > tongue you may never get over." Ben Franklin -Original > Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm > Sent: Thursday, February 05, 2009 5:44 AM > To: 'ElecraftList' > Subject: [Elecraft] [K3] Elecraft roofing filters > > Dear all, > > In the "Roofing Filter Notes from Wayne and Eric" link on the > Order page I see the two sentences: "Add narrower/wider > filters as you prefer. I like to use the 1.0 kHz crystal > filter when tuning a crowded band or listening to a pile up." > > Can anyone point me to a place that can tell me w
Re: [Elecraft] [K3] Elecraft roofing filters
Quoted discussion from K2AV and W4TV: > > > > Anyone who asks us what filters to buy for CW contesting, we > > tell them 400/250 8 pole set to 450/350. Tried and true, not > > theory. > > > > W4TV and I will just have to agree to disagree. > > I don't think there is any disagreement ... unless you have > actually tried a 400/200 pair set to 450/250 and are trying > to say that the 250 Hz filter is tighter and suffers fewer > hardware AGC effects than the 200 Hz filter. If you try to > make that point, there are several others including W4ZV, > who will disagree with you. > > 73, > >... Joe, W4TV > The data I measured for the -30 dB down BW's of my 200 and 250 Hz filters supports what Joe says: 430 Hz for the 200 Hz 5-pole versus 500 Hz for the 250 Hz 8-pole. As a nearly 100% CW operator, I do like having three CW roofing filters in my rig. Matching DSP cutoff points to the various filters is another variable to play with, and thanks to Guy for the suggestions there. I do think there is a bit of a "truth in labeling" issue with regard to narrow crystal filters that needs to be addressed by the manufacturers. Not everybody will remember, for instance, that a 250 Hz filter may really have a bandwidth of 375 Hz. I recall a similar issue with a "125 Hz" filter that I purchased for my TS-850S some years back. The filter curve supplied by the manufacturer showed it was actually considerably wider than that (more than 200 Hz, as I recall). I can understand the difficulty in manufacturing very high Q multiple pole crystal filters, and that there might have been a design goal in mind that wasn't met. However, once we know that the design goal wasn't met, shouldn't we revise our labelling to more accurately reflect real world results? 73, Chuck Guenther NI0C K2/10 s/n 5853 K3/100 s/n 1061 __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
Does he really need two FM filters? If you want to do diversity receive make sure you ask for matching filters. I don't know if you really need all those filters in the sub receiver. I would assume most of your main operating would be off the main receiver. Mike W0MU "A slip of the foot you may soon recover, but a slip of the tongue you may never get over." Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: Friday, February 06, 2009 1:32 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Elecraft roofing filters Dear all, Once and again: Thanks to all for very interesting and informative answers. Right now my conclusion according to my planed way of operation is the following setup 2 pcs KFL3A-2.8_2.7sw replacement K3 and KRX3 2 pcs KFL3A-1.8K SSB 2 pcs KFL3A-200 5-pole CW + matching 2 pcs KFL3A-400 CW 2 pcs KFL3B-FM FM For the purpose of working as many DXCC countries as possible including picking new ones during contests on crowded bands. As I understand this configuration will not allow me to receive or transmit on AM but it will maybe allow ESSB later if the firmware can be modified to use the FM filter for ESSB. Any further comments before my ordering will be appreciated. Vy 73 OZ1CCM Kjeld -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: 5. februar 2009 17:27 To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Elecraft roofing filters Dear all, Thanks for all the kind answers. Sorry for all that fuss. Somehow I mixed up everything so I ended up thinking of some nonsense like 1.0 kHz for SSB. :-o I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. And also filters for AM and FM. Vy 73 OZ1CCM Kjeld -Original Message- From: W0MU Mike Fatchett [mailto:w...@w0mu.com] Sent: 5. februar 2009 15:28 To: 'Kjeld Holm' Subject: RE: [Elecraft] [K3] Elecraft roofing filters They are available on the website. KFL3A-1.0K 1 kHz, 8-pole roofing filter125.95 I have one in my K3 but I don't use it too much. You might want to use it over a 250 or 500 filter to listen to a pile up so you can hear if the station is working people above or below his frequency. I have listened to SSB a bit on the filter and while very narrow for SSB you can hear the station. The better question might be, what modes do you like to operate? I am about to order a second K3 and I was going to go with the following filters. 2.8 replacing the stock 2.7/ AM/ FM/ 400 or 500 and 250. If you never play to transmit on AM or want to do ESSB or FM those slots would be available. The K3 I have now has the 2.7 which is being replaced with the 2.8/1.8/1.0/400/200 in the main rcv, 2.8/400 in the sub. Mike W0MU "A slip of the foot you may soon recover, but a slip of the tongue you may never get over." Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: Thursday, February 05, 2009 5:44 AM To: 'ElecraftList' Subject: [Elecraft] [K3] Elecraft roofing filters Dear all, In the "Roofing Filter Notes from Wayne and Eric" link on the Order page I see the two sentences: "Add narrower/wider filters as you prefer. I like to use the 1.0 kHz crystal filter when tuning a crowded band or listening to a pile up." Can anyone point me to a place that can tell me what "the 1.0 kHz crystal filter" is, where to obtain one and when it is worth using? Vy 73 OZ1CCM Kjeld __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
This filter mystery seems to be a common exercise for purchasers of a K3. Having just gone through this myself, reading all of the data available, and consulting with K3 owners for their experiences, I settled on the following assortment of filters for my new K3: KFL3A-6K 6.0 kHz 8 pole KFL3A-2.7K 2.7 kHz 5 pole (standard) KFL3A-500500 Hz 5 pole KFL3A-200200 Hz 5 pole I am extremely pleased with the performance with these filters and along with the DSP, even the bedlam that was going on in the recent CQWW 160 contest was easy to listen to and to sort out weak signals among the very strong. I cannot say enough about how pleased I am with the performance. My only wish is that I could be heard as well as I now hear! If I was to add anything, it might be the 1 kHz filter to fill in the wide gap between the 2.7k and 500 Hz filters but this is a personal suspicion rather than a scientific determination. 73, Bob W5OV -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: Friday, February 06, 2009 2:32 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Elecraft roofing filters Dear all, Once and again: Thanks to all for very interesting and informative answers. Right now my conclusion according to my planed way of operation is the following setup 2 pcs KFL3A-2.8_2.7sw replacement K3 and KRX3 2 pcs KFL3A-1.8K SSB 2 pcs KFL3A-200 5-pole CW + matching 2 pcs KFL3A-400 CW 2 pcs KFL3B-FM FM For the purpose of working as many DXCC countries as possible including picking new ones during contests on crowded bands. As I understand this configuration will not allow me to receive or transmit on AM but it will maybe allow ESSB later if the firmware can be modified to use the FM filter for ESSB. Any further comments before my ordering will be appreciated. Vy 73 OZ1CCM Kjeld -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: 5. februar 2009 17:27 To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Elecraft roofing filters Dear all, Thanks for all the kind answers. Sorry for all that fuss. Somehow I mixed up everything so I ended up thinking of some nonsense like 1.0 kHz for SSB. :-o I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. And also filters for AM and FM. Vy 73 OZ1CCM Kjeld -Original Message- From: W0MU Mike Fatchett [mailto:w...@w0mu.com] Sent: 5. februar 2009 15:28 To: 'Kjeld Holm' Subject: RE: [Elecraft] [K3] Elecraft roofing filters They are available on the website. KFL3A-1.0K 1 kHz, 8-pole roofing filter125.95 I have one in my K3 but I don't use it too much. You might want to use it over a 250 or 500 filter to listen to a pile up so you can hear if the station is working people above or below his frequency. I have listened to SSB a bit on the filter and while very narrow for SSB you can hear the station. The better question might be, what modes do you like to operate? I am about to order a second K3 and I was going to go with the following filters. 2.8 replacing the stock 2.7/ AM/ FM/ 400 or 500 and 250. If you never play to transmit on AM or want to do ESSB or FM those slots would be available. The K3 I have now has the 2.7 which is being replaced with the 2.8/1.8/1.0/400/200 in the main rcv, 2.8/400 in the sub. Mike W0MU "A slip of the foot you may soon recover, but a slip of the tongue you may never get over." Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: Thursday, February 05, 2009 5:44 AM To: 'ElecraftList' Subject: [Elecraft] [K3] Elecraft roofing filters Dear all, In the "Roofing Filter Notes from Wayne and Eric" link on the Order page I see the two sentences: "Add narrower/wider filters as you prefer. I like to use the 1.0 kHz crystal filter when tuning a crowded band or listening to a pile up." Can anyone point me to a place that can tell me what "the 1.0 kHz crystal filter" is, where to obtain one and when it is worth using? Vy 73 OZ1CCM Kjeld __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ El
Re: [Elecraft] [K3] Elecraft roofing filters
Kleld there has been some debate over the use of FM bandwidth filtering to transmit AM (or ESSB), I don't have an FM filter so cannot give a measurement for the bandwidth that may result from transmitting AM or ESSB through the filter. Using the 6 KHz "AM" filter gives a nice tight transmission on AM with a bandwidth of approximately +/- 3KHz down to many dB's below peak. ESSB through the 6 KHz filter is also nice and tight. There are some excessively wide AM transmissions here in the UK on AM, several have been measured at +/- 10 KHz or more, these are usually older, or home built, transmitters rather than recent commercial units. AM can use excessive bandwidth so I would hope K3 users would set a good example and keep their transmissions within reasonable limits. Bottom line, if you want to transmit AM or ESSB consider using the 6 KHz rather than the 13 KHz filter unless you can be sure your bandwidth isn't excessive with one. 73 Dave, G4AON K3/100 #80 2 pcs KFL3A-2.8_2.7sw replacement K3 and KRX3 2 pcs KFL3A-1.8K SSB 2 pcs KFL3A-200 5-pole CW + matching 2 pcs KFL3A-400 CW 2 pcs KFL3B-FM FM For the purpose of working as many DXCC countries as possible including picking new ones during contests on crowded bands. As I understand this configuration will not allow me to receive or transmit on AM but it will maybe allow ESSB later if the firmware can be modified to use the FM filter for ESSB. Any further comments before my ordering will be appreciated. Vy 73 OZ1CCM Kjeld __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
Dear all, Once and again: Thanks to all for very interesting and informative answers. Right now my conclusion according to my planed way of operation is the following setup 2 pcs KFL3A-2.8_2.7sw replacement K3 and KRX3 2 pcs KFL3A-1.8K SSB 2 pcs KFL3A-200 5-pole CW + matching 2 pcs KFL3A-400 CW 2 pcs KFL3B-FM FM For the purpose of working as many DXCC countries as possible including picking new ones during contests on crowded bands. As I understand this configuration will not allow me to receive or transmit on AM but it will maybe allow ESSB later if the firmware can be modified to use the FM filter for ESSB. Any further comments before my ordering will be appreciated. Vy 73 OZ1CCM Kjeld -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: 5. februar 2009 17:27 To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Elecraft roofing filters Dear all, Thanks for all the kind answers. Sorry for all that fuss. Somehow I mixed up everything so I ended up thinking of some nonsense like 1.0 kHz for SSB. :-o I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. And also filters for AM and FM. Vy 73 OZ1CCM Kjeld -Original Message- From: W0MU Mike Fatchett [mailto:w...@w0mu.com] Sent: 5. februar 2009 15:28 To: 'Kjeld Holm' Subject: RE: [Elecraft] [K3] Elecraft roofing filters They are available on the website. KFL3A-1.0K 1 kHz, 8-pole roofing filter125.95 I have one in my K3 but I don't use it too much. You might want to use it over a 250 or 500 filter to listen to a pile up so you can hear if the station is working people above or below his frequency. I have listened to SSB a bit on the filter and while very narrow for SSB you can hear the station. The better question might be, what modes do you like to operate? I am about to order a second K3 and I was going to go with the following filters. 2.8 replacing the stock 2.7/ AM/ FM/ 400 or 500 and 250. If you never play to transmit on AM or want to do ESSB or FM those slots would be available. The K3 I have now has the 2.7 which is being replaced with the 2.8/1.8/1.0/400/200 in the main rcv, 2.8/400 in the sub. Mike W0MU "A slip of the foot you may soon recover, but a slip of the tongue you may never get over." Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: Thursday, February 05, 2009 5:44 AM To: 'ElecraftList' Subject: [Elecraft] [K3] Elecraft roofing filters Dear all, In the "Roofing Filter Notes from Wayne and Eric" link on the Order page I see the two sentences: "Add narrower/wider filters as you prefer. I like to use the 1.0 kHz crystal filter when tuning a crowded band or listening to a pile up." Can anyone point me to a place that can tell me what "the 1.0 kHz crystal filter" is, where to obtain one and when it is worth using? Vy 73 OZ1CCM Kjeld __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
> Having used three different K3's equipped with 4 different > sets of 250 & 400 hz 8 poles in overload city major contests, > the usefulness of these filters is belied by the apparent > closeness of numbers. I'm happy that you are finding success with the 400/250 filter pair but given the published specifications I suspect your results have more to do with the DSP performance than the actual width of the 250 Hz filter. There is so little difference in the published curves for the two filters (150 Hz at -60 dB) that roofing filter performance alone can not be responsible for the differences performance you describe. If one is looking for improved "narrow CW" performance, the 400/200 combination is a more effective and cost efficient pairing. > Anyone who asks us what filters to buy for CW contesting, we > tell them 400/250 8 pole set to 450/350. Tried and true, not > theory. > > W4TV and I will just have to agree to disagree. I don't think there is any disagreement ... unless you have actually tried a 400/200 pair set to 450/250 and are trying to say that the 250 Hz filter is tighter and suffers fewer hardware AGC effects than the 200 Hz filter. If you try to make that point, there are several others including W4ZV, who will disagree with you. 73, ... Joe, W4TV > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Guy > Olinger, K2AV > Sent: Tuesday, August 04, 2009 10:14 PM > To: ni0c; elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Elecraft roofing filters > > > Having used three different K3's equipped with 4 different > sets of 250 & 400 hz 8 poles in overload city major contests, > the usefulness of these filters is belied by the apparent > closeness of numbers. > > In practice we have found that associating the 400 with a DSP > width of 450, and the "250" with a DSP width of 350 has been > extremely useful, however "too close by the numbers" that may > look on paper. > > We use 450 for running for as long as it may last, and when > the inevitable 30 over 9 crowder squeezes down on us, I > reduce to 350 and if that isn't enough, *ADDITIONALLY* shift > the center away 50 hz more. This combination plus the noise > blanker for key clicks has worked extremely well. (Having 50 > Hz granularity on the CW shift/widths would be *SO* useful here...) > > I have measured the combined (roofing+DSP) drop on the > steepest part of the skirts at ~12 db per 10 Hz with these > two 8 pole filters. So bringing in the skirt "only" 30 or 40 > Hz is enough to push down the crowder quite a bit, usually > well out of hardware AGC, without narrowing the listening > window to the point of missing QSO points and multipliers > from all the inevitable off-frequency callers. > > Anyone who asks us what filters to buy for CW contesting, we > tell them 400/250 8 pole set to 450/350. Tried and true, not theory. > > W4TV and I will just have to agree to disagree. > > 73, Guy. > - Original Message - > From: ni0c > To: elecraft@mailman.qth.net > Sent: Thursday, February 05, 2009 4:47 PM > Subject: [Elecraft] [K3] Elecraft roofing filters > > > W4TV wrote: > "The difference between the 250 and 400 Hz filters is not > enough to be worthwhile (approximately 375 Hz vs. 430 Hz). " > > Joe, what is your source for these numbers? I've seen numbers > like this mentioned previously on the reflector. > > I recently tested my K3 CW roofing filters using the XG-2 generator > at 7040 KHz (50 microvolts input) and KS7D's nice software package, > "K3 Filter Tools." > > Here's what I came up with, with AGC off and with the DSP > bandwidth set at least as wide as 900 Hz for all tests (to isolate > the effects of just the crystal roofing filter): > > 200 Hz, 5-pole: -6 dB BW = 210 Hz; -30 dB BW = 430 Hz > > 250 Hz, 8-pole: -6 dB BW = 260 Hz; -30 dB BW = 500 Hz > > 400 Hz, 8-pole: -6 dB BW = 380 Hz; -30 dB BW = 580 Hz > > Note the uncertainty in each of the bandwidths above is > plus or minus 20 Hz, because I ran these sweeps in 10 Hz > increments to save time. (I'll repeat these tests using a > 1 or 2 Hz increment, when I have some spare time.) > > These tests on my filters (as well as my experience by ear) > indicate there is an appreciable difference in the 250 and > 400 Hz 8-pole filters. I've always wondered, too, about > manufacturing tolerances on narrow crystal filters. > > 73, > Chuck Guenther NI0C > > > > > > > > >
Re: [Elecraft] [K3] Elecraft roofing filters
That's a wish for 10 Hz shift/width below, not 50 :) - Original Message - From: Guy Olinger, K2AV To: ni0c ; elecraft@mailman.qth.net Sent: Tuesday, August 04, 2009 10:14 PM Subject: Re: [Elecraft] [K3] Elecraft roofing filters Having used three different K3's equipped with 4 different sets of 250 & 400 hz 8 poles in overload city major contests, the usefulness of these filters is belied by the apparent closeness of numbers. In practice we have found that associating the 400 with a DSP width of 450, and the "250" with a DSP width of 350 has been extremely useful, however "too close by the numbers" that may look on paper. We use 450 for running for as long as it may last, and when the inevitable 30 over 9 crowder squeezes down on us, I reduce to 350 and if that isn't enough, *ADDITIONALLY* shift the center away 50 hz more. This combination plus the noise blanker for key clicks has worked extremely well. (Having 50 Hz granularity on the CW shift/widths would be *SO* useful here...) I have measured the combined (roofing+DSP) drop on the steepest part of the skirts at ~12 db per 10 Hz with these two 8 pole filters. So bringing in the skirt "only" 30 or 40 Hz is enough to push down the crowder quite a bit, usually well out of hardware AGC, without narrowing the listening window to the point of missing QSO points and multipliers from all the inevitable off-frequency callers. Anyone who asks us what filters to buy for CW contesting, we tell them 400/250 8 pole set to 450/350. Tried and true, not theory. W4TV and I will just have to agree to disagree. 73, Guy. - Original Message - From: ni0c To: elecraft@mailman.qth.net Sent: Thursday, February 05, 2009 4:47 PM Subject: [Elecraft] [K3] Elecraft roofing filters W4TV wrote: "The difference between the 250 and 400 Hz filters is not enough to be worthwhile (approximately 375 Hz vs. 430 Hz). " Joe, what is your source for these numbers? I've seen numbers like this mentioned previously on the reflector. I recently tested my K3 CW roofing filters using the XG-2 generator at 7040 KHz (50 microvolts input) and KS7D's nice software package, "K3 Filter Tools." Here's what I came up with, with AGC off and with the DSP bandwidth set at least as wide as 900 Hz for all tests (to isolate the effects of just the crystal roofing filter): 200 Hz, 5-pole: -6 dB BW = 210 Hz; -30 dB BW = 430 Hz 250 Hz, 8-pole: -6 dB BW = 260 Hz; -30 dB BW = 500 Hz 400 Hz, 8-pole: -6 dB BW = 380 Hz; -30 dB BW = 580 Hz Note the uncertainty in each of the bandwidths above is plus or minus 20 Hz, because I ran these sweeps in 10 Hz increments to save time. (I'll repeat these tests using a 1 or 2 Hz increment, when I have some spare time.) These tests on my filters (as well as my experience by ear) indicate there is an appreciable difference in the 250 and 400 Hz 8-pole filters. I've always wondered, too, about manufacturing tolerances on narrow crystal filters. 73, Chuck Guenther NI0C __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html -- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html__ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
Having used three different K3's equipped with 4 different sets of 250 & 400 hz 8 poles in overload city major contests, the usefulness of these filters is belied by the apparent closeness of numbers. In practice we have found that associating the 400 with a DSP width of 450, and the "250" with a DSP width of 350 has been extremely useful, however "too close by the numbers" that may look on paper. We use 450 for running for as long as it may last, and when the inevitable 30 over 9 crowder squeezes down on us, I reduce to 350 and if that isn't enough, *ADDITIONALLY* shift the center away 50 hz more. This combination plus the noise blanker for key clicks has worked extremely well. (Having 50 Hz granularity on the CW shift/widths would be *SO* useful here...) I have measured the combined (roofing+DSP) drop on the steepest part of the skirts at ~12 db per 10 Hz with these two 8 pole filters. So bringing in the skirt "only" 30 or 40 Hz is enough to push down the crowder quite a bit, usually well out of hardware AGC, without narrowing the listening window to the point of missing QSO points and multipliers from all the inevitable off-frequency callers. Anyone who asks us what filters to buy for CW contesting, we tell them 400/250 8 pole set to 450/350. Tried and true, not theory. W4TV and I will just have to agree to disagree. 73, Guy. - Original Message - From: ni0c To: elecraft@mailman.qth.net Sent: Thursday, February 05, 2009 4:47 PM Subject: [Elecraft] [K3] Elecraft roofing filters W4TV wrote: "The difference between the 250 and 400 Hz filters is not enough to be worthwhile (approximately 375 Hz vs. 430 Hz). " Joe, what is your source for these numbers? I've seen numbers like this mentioned previously on the reflector. I recently tested my K3 CW roofing filters using the XG-2 generator at 7040 KHz (50 microvolts input) and KS7D's nice software package, "K3 Filter Tools." Here's what I came up with, with AGC off and with the DSP bandwidth set at least as wide as 900 Hz for all tests (to isolate the effects of just the crystal roofing filter): 200 Hz, 5-pole: -6 dB BW = 210 Hz; -30 dB BW = 430 Hz 250 Hz, 8-pole: -6 dB BW = 260 Hz; -30 dB BW = 500 Hz 400 Hz, 8-pole: -6 dB BW = 380 Hz; -30 dB BW = 580 Hz Note the uncertainty in each of the bandwidths above is plus or minus 20 Hz, because I ran these sweeps in 10 Hz increments to save time. (I'll repeat these tests using a 1 or 2 Hz increment, when I have some spare time.) These tests on my filters (as well as my experience by ear) indicate there is an appreciable difference in the 250 and 400 Hz 8-pole filters. I've always wondered, too, about manufacturing tolerances on narrow crystal filters. 73, Chuck Guenther NI0C -- __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html__ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
> I'm still wondering what the tolerance is on such published > curves. I would not be so much concerned about tolerance as sampling error on the curves. Still, the Elecraft curves are generally similar to those given by INRAD for the same filter or those with a similar (e.g., 8215 or 8830 KHz) center frequency and bandwidth. For example, Inrad's curves for the KFL3A-2.1K & KFL3A-1.0 are identical to those from Elecraft ... Inrad's curves are wider for the KFL3A-6K & KFL3A-400 and Elecraft's cure is wider for the KFL3A-1.8K. (Inrad does not publish curves for the KFL3A-2.8K or KFL3A-250 ... nor do they have any information on the 1500 and 500 Hz "custom" filters) > My testing was done in CW mode with the pitch in the > low 300's (320 Hz, as I recall). The DSP begins to roll off at 200 Hz even if LO = 0.00. Any measurement where FC (Pitch) is less than [BW60/2 + 200] will be inaccurate on the skirts and any measurement where FC is less than BW6/2 + 200 will have essentially identical lower frequency responses. 73, ... Joe, W4TV > -Original Message- > From: ni0c [mailto:n...@earthlink.net] > Sent: Thursday, February 05, 2009 5:42 PM > To: li...@subich.com; elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Elecraft roofing filters > > > W4TV wrote: > > > > My source is Elecraft: www.elecraft.com/K3/K3_8_pole_plots.htm > > > > Look specifically at the last two plots which show: > > > >KFL3A-400 KFL3A-250 > > -6 dB 435 Hz 370 Hz > > -60 dB 935 Hz 785 Hz > >SF2.15:1 2.12:1 > > > > INRAD do not publish the curves for the Elecraft (or Yaesu > > 8215 KHz) 250 Hz filter. However, they do show the curve > > for the 8830 KHz (Kenwood) version of the same filter and > > it shows a similar percentage bandwidth (367.5/845 Hz at > > -6/60dB). > > > > NI0C responds: > > I'm still wondering what the tolerance is on such published curves. > > > > Did you run those tests in a Data mode or with the CW pitch > > set to 800 Hz? If not, the low frequency skirts will be > > sharpened significantly and the measured bandwidth will > > less than the roofing filter. With a CW pitch of 560 Hz > > I measure 10% less bandwidth than in DATA (CF = 1500 Hz or > > 2210 Hz). If I reduce the pitch to 300 Hz, the measured > > bandwidth is further reduced (due to the DSP filter's low > > frequency cut-off). > > > > 73, > > > >... Joe, W4TV > > NI0C responds: > > My testing was done in CW mode with the pitch in the > low 300's (320 Hz, as I recall). So, when I repeat the tests, > I'll vary the pitch and see what happens, say 300 Hz, 600 hz, > and 800 Hz. > > 73 & Thanks, Joe, for your info! > > Chuck Guenther NI0C > > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
ni0c wrote: > > My testing was done in CW mode with the pitch in the > low 300's (320 Hz, as I recall). So, when I repeat the tests, > I'll vary the pitch and see what happens, say 300 Hz, 600 hz, > and 800 Hz. > Another person who likes a low pitch! This really affects what you will hear because the MCU firmware shifts the bandpass so that the low end always truncates at ~200 Hz. If you use a nominal 500 Hz filter, this means it will be positioned from 200-700 Hz, so you'll hear signals 400 Hz above your zero beat frequency of 300. This would be equivalent to an 800 Hz filter if centered. The K3 operates differently from Orion which I know you had before. This is exactly why I sold my 1000 Hz filter. With a nominal bandwidth of 1100 Hz and 300 Hz PITCH, I was hearing signals 1 kHz above my zero beat QRG (i.e. my actual bandpass was 200-1300 Hz). 1 kHz above my QRG is not practical on any sort of crowded band. If the band is not crowded with strong signals then the stock 2.7k filter is about as effective. 73, Bill -- View this message in context: http://n2.nabble.com/Elecraft-roofing-filters-tp2277174p2278065.html Sent from the [K3] mailing list archive at Nabble.com. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
W4TV wrote: > My source is Elecraft: www.elecraft.com/K3/K3_8_pole_plots.htm > > Look specifically at the last two plots which show: > >KFL3A-400 KFL3A-250 > -6 dB 435 Hz 370 Hz > -60 dB 935 Hz 785 Hz >SF2.15:1 2.12:1 > > INRAD do not publish the curves for the Elecraft (or Yaesu > 8215 KHz) 250 Hz filter. However, they do show the curve > for the 8830 KHz (Kenwood) version of the same filter and > it shows a similar percentage bandwidth (367.5/845 Hz at > -6/60dB). > NI0C responds: I'm still wondering what the tolerance is on such published curves. > Did you run those tests in a Data mode or with the CW pitch > set to 800 Hz? If not, the low frequency skirts will be > sharpened significantly and the measured bandwidth will > less than the roofing filter. With a CW pitch of 560 Hz > I measure 10% less bandwidth than in DATA (CF = 1500 Hz or > 2210 Hz). If I reduce the pitch to 300 Hz, the measured > bandwidth is further reduced (due to the DSP filter's low > frequency cut-off). > > 73, > >... Joe, W4TV NI0C responds: My testing was done in CW mode with the pitch in the low 300's (320 Hz, as I recall). So, when I repeat the tests, I'll vary the pitch and see what happens, say 300 Hz, 600 hz, and 800 Hz. 73 & Thanks, Joe, for your info! Chuck Guenther NI0C __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
> "The difference between the 250 and 400 Hz filters is not > enough to be worthwhile (approximately 375 Hz vs. 430 Hz). " > > Joe, what is your source for these numbers? I've seen numbers > like this mentioned previously on the reflector. My source is Elecraft: www.elecraft.com/K3/K3_8_pole_plots.htm Look specifically at the last two plots which show: KFL3A-400 KFL3A-250 -6 dB 435 Hz 370 Hz -60 dB 935 Hz 785 Hz SF2.15:1 2.12:1 INRAD do not publish the curves for the Elecraft (or Yaesu 8215 KHz) 250 Hz filter. However, they do show the curve for the 8830 KHz (Kenwood) version of the same filter and it shows a similar percentage bandwidth (367.5/845 Hz at -6/60dB). > Here's what I came up with, with AGC off and with the DSP > bandwidth set at least as wide as 900 Hz for all tests (to > isolate the effects of just the crystal roofing filter): > > 200 Hz, 5-pole: -6 dB BW = 210 Hz; -30 dB BW = 430 Hz > > 250 Hz, 8-pole: -6 dB BW = 260 Hz; -30 dB BW = 500 Hz > > 400 Hz, 8-pole: -6 dB BW = 380 Hz; -30 dB BW = 580 Hz Did you run those tests in a Data mode or with the CW pitch set to 800 Hz? If not, the low frequency skirts will be sharpened significantly and the measured bandwidth will less than the roofing filter. With a CW pitch of 560 Hz I measure 10% less bandwidth than in DATA (CF = 1500 Hz or 2210 Hz). If I reduce the pitch to 300 Hz, the measured bandwidth is further reduced (due to the DSP filter's low frequency cut-off). 73, ... Joe, W4TV > -Original Message- > From: elecraft-boun...@mailman.qth.net > [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of ni0c > Sent: Thursday, February 05, 2009 3:47 PM > To: elecraft@mailman.qth.net > Subject: [Elecraft] [K3] Elecraft roofing filters > > > W4TV wrote: > "The difference between the 250 and 400 Hz filters is not > enough to be worthwhile (approximately 375 Hz vs. 430 Hz). " > > Joe, what is your source for these numbers? I've seen numbers > like this mentioned previously on the reflector. > > I recently tested my K3 CW roofing filters using the XG-2 generator > at 7040 KHz (50 microvolts input) and KS7D's nice software package, > "K3 Filter Tools." > > Here's what I came up with, with AGC off and with the DSP > bandwidth set at least as wide as 900 Hz for all tests (to isolate > the effects of just the crystal roofing filter): > > 200 Hz, 5-pole: -6 dB BW = 210 Hz; -30 dB BW = 430 Hz > > 250 Hz, 8-pole: -6 dB BW = 260 Hz; -30 dB BW = 500 Hz > > 400 Hz, 8-pole: -6 dB BW = 380 Hz; -30 dB BW = 580 Hz > > Note the uncertainty in each of the bandwidths above is > plus or minus 20 Hz, because I ran these sweeps in 10 Hz > increments to save time. (I'll repeat these tests using a > 1 or 2 Hz increment, when I have some spare time.) > > These tests on my filters (as well as my experience by ear) > indicate there is an appreciable difference in the 250 and > 400 Hz 8-pole filters. I've always wondered, too, about > manufacturing tolerances on narrow crystal filters. > > 73, > Chuck Guenther NI0C > > > > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
> The 250Hz and 400Hz filters are very similar, in reality. Having both > is redundant. But having a 1.8kHz or 2.1kHz for SSB RX is a good > thing for contesting. Note that some people have used a custom 1.5kHz > roofing filter with good success for SSB contesting. > I have to agree with Doug on this, get either one, but not both. I have both the 400Hz and 250Hz and I saw little difference between them. When I installed my KRX3 I took the 400hz filter out of the main receiver and moved it over to the 2nd receiver. I am happy the way it works now. So, that's 2.7Khz and 250Hz for the main receiver and 2.7Khz and 400Hz for the sub. Diversity receive still works fine. YMMV. Andreas, N6NU __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
> I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. > And also filters for AM and FM. The difference between the 250 and 400 Hz filters is not enough to be worthwhile (approximately 375 Hz vs. 430 Hz). If you want a narrow filter get the Elecraft 200 Hz 5-pole unit. In addition, you should not need both the FM and AM filters if the firmware was fixed to allow the use of the FM filter for ESSB and AM transmit. If you plan to use the AM filter only for receiving, that is even more reason to bypass the AM roofer and leave a space for the 1.5 or 1.8 KHz SSB filter. 73, ... Joe, W4TV > --Original Message-- > From: Kjeld Holm > Sender: elecraft-boun...@mailman.qth.net > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Elecraft roofing filters > Sent: Feb 5, 2009 11:27 AM > > Dear all, > > Thanks for all the kind answers. > > Sorry for all that fuss. Somehow I mixed up everything so I > ended up thinking of some nonsense like 1.0 kHz for SSB. :-o > > I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. > And also filters for AM and FM. > > Vy 73 > OZ1CCM Kjeld > __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
The 250Hz and 400Hz filters are very similar, in reality. Having both is redundant. But having a 1.8kHz or 2.1kHz for SSB RX is a good thing for contesting. Note that some people have used a custom 1.5kHz roofing filter with good success for SSB contesting. This is all from a little experience, and listening to people with LOTS of experince and knowledge. 73, doug From: "David Ferrington, M0XDF" Date: Thu, 5 Feb 2009 17:46:52 + I agree with that, but the 1.8kHz sure helps in SSB Contests 73 de M0XDF, K3 #174 -- Mathematics is the language with which God has written the universe. -Galileo Galilei, physicist and astronomer (1564-1642) On 5 Feb 2009, at 16:53, k...@verizon.net wrote: > I have the 400 and don't see the need for 250 > --Original Message-- > From: Kjeld Holm > Sender: elecraft-boun...@mailman.qth.net > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Elecraft roofing filters > Sent: Feb 5, 2009 11:27 AM > > Dear all, > > Thanks for all the kind answers. > > Sorry for all that fuss. Somehow I mixed up everything so I ended up > thinking of some nonsense like 1.0 kHz for SSB. :-o > > I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. And also > filters for AM and FM. > > Vy 73 > OZ1CCM Kjeld __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
I agree with that, but the 1.8kHz sure helps in SSB Contests 73 de M0XDF, K3 #174 -- Mathematics is the language with which God has written the universe. -Galileo Galilei, physicist and astronomer (1564-1642) On 5 Feb 2009, at 16:53, k...@verizon.net wrote: > I have the 400 and don't see the need for 250 > --Original Message-- > From: Kjeld Holm > Sender: elecraft-boun...@mailman.qth.net > To: elecraft@mailman.qth.net > Subject: Re: [Elecraft] [K3] Elecraft roofing filters > Sent: Feb 5, 2009 11:27 AM > > Dear all, > > Thanks for all the kind answers. > > Sorry for all that fuss. Somehow I mixed up everything so I ended up > thinking of some nonsense like 1.0 kHz for SSB. :-o > > I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. And also > filters for AM and FM. > > Vy 73 > OZ1CCM Kjeld __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
I have the 400 and don't see the need for 250 --Original Message-- From: Kjeld Holm Sender: elecraft-boun...@mailman.qth.net To: elecraft@mailman.qth.net Subject: Re: [Elecraft] [K3] Elecraft roofing filters Sent: Feb 5, 2009 11:27 AM Dear all, Thanks for all the kind answers. Sorry for all that fuss. Somehow I mixed up everything so I ended up thinking of some nonsense like 1.0 kHz for SSB. :-o I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. And also filters for AM and FM. Vy 73 OZ1CCM Kjeld -Original Message- From: W0MU Mike Fatchett [mailto:w...@w0mu.com] Sent: 5. februar 2009 15:28 To: 'Kjeld Holm' Subject: RE: [Elecraft] [K3] Elecraft roofing filters They are available on the website. KFL3A-1.0K 1 kHz, 8-pole roofing filter125.95 I have one in my K3 but I don't use it too much. You might want to use it over a 250 or 500 filter to listen to a pile up so you can hear if the station is working people above or below his frequency. I have listened to SSB a bit on the filter and while very narrow for SSB you can hear the station. The better question might be, what modes do you like to operate? I am about to order a second K3 and I was going to go with the following filters. 2.8 replacing the stock 2.7/ AM/ FM/ 400 or 500 and 250. If you never play to transmit on AM or want to do ESSB or FM those slots would be available. The K3 I have now has the 2.7 which is being replaced with the 2.8/1.8/1.0/400/200 in the main rcv, 2.8/400 in the sub. Mike W0MU "A slip of the foot you may soon recover, but a slip of the tongue you may never get over." Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: Thursday, February 05, 2009 5:44 AM To: 'ElecraftList' Subject: [Elecraft] [K3] Elecraft roofing filters Dear all, In the "Roofing Filter Notes from Wayne and Eric" link on the Order page I see the two sentences: "Add narrower/wider filters as you prefer. I like to use the 1.0 kHz crystal filter when tuning a crowded band or listening to a pile up." Can anyone point me to a place that can tell me what "the 1.0 kHz crystal filter" is, where to obtain one and when it is worth using? Vy 73 OZ1CCM Kjeld __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Sent from my Verizon Wireless BlackBerry __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
Dear all, Thanks for all the kind answers. Sorry for all that fuss. Somehow I mixed up everything so I ended up thinking of some nonsense like 1.0 kHz for SSB. :-o I will go for 250 Hz and 400 Hz for CW plus 2.8 kHz for SSB. And also filters for AM and FM. Vy 73 OZ1CCM Kjeld -Original Message- From: W0MU Mike Fatchett [mailto:w...@w0mu.com] Sent: 5. februar 2009 15:28 To: 'Kjeld Holm' Subject: RE: [Elecraft] [K3] Elecraft roofing filters They are available on the website. KFL3A-1.0K 1 kHz, 8-pole roofing filter125.95 I have one in my K3 but I don't use it too much. You might want to use it over a 250 or 500 filter to listen to a pile up so you can hear if the station is working people above or below his frequency. I have listened to SSB a bit on the filter and while very narrow for SSB you can hear the station. The better question might be, what modes do you like to operate? I am about to order a second K3 and I was going to go with the following filters. 2.8 replacing the stock 2.7/ AM/ FM/ 400 or 500 and 250. If you never play to transmit on AM or want to do ESSB or FM those slots would be available. The K3 I have now has the 2.7 which is being replaced with the 2.8/1.8/1.0/400/200 in the main rcv, 2.8/400 in the sub. Mike W0MU "A slip of the foot you may soon recover, but a slip of the tongue you may never get over." Ben Franklin -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: Thursday, February 05, 2009 5:44 AM To: 'ElecraftList' Subject: [Elecraft] [K3] Elecraft roofing filters Dear all, In the "Roofing Filter Notes from Wayne and Eric" link on the Order page I see the two sentences: "Add narrower/wider filters as you prefer. I like to use the 1.0 kHz crystal filter when tuning a crowded band or listening to a pile up." Can anyone point me to a place that can tell me what "the 1.0 kHz crystal filter" is, where to obtain one and when it is worth using? Vy 73 OZ1CCM Kjeld __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] [K3] Elecraft roofing filters
On the K3 order page you will find: KFL3A-1.0K 1 kHz, 8-pole roofing filter _ From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Kjeld Holm Sent: Thursday, February 05, 2009 6:44 AM To: 'ElecraftList' Subject: [Elecraft] [K3] Elecraft roofing filters Dear all, In the "Roofing Filter Notes from Wayne and Eric" link on the Order page I see the two sentences: "Add narrower/wider filters as you prefer. I like to use the 1.0 kHz crystal filter when tuning a crowded band or listening to a pile up." Can anyone point me to a place that can tell me what "the 1.0 kHz crystal filter" is, where to obtain one and when it is worth using? Vy 73 OZ1CCM Kjeld __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 - Elecraft Antenna Tuner KAT3
I usually get 1.0 to 1 on a variety of antennas including my 160 sloper cut for 1.947 down on the CW portion of the band. Sometimes it's not quite as good but that's when I'm trying to make a really bad match work. Bill NZ0T Lee Buller wrote: > > > I am curious as to the experience of others on the list concerning the > KAT3. Mine works find, but never finds that 1.0 to 1 match. It will find > 1.2 or so (which is OK I know) but does not seem to find anything better. > Yes, I do the tune procedure twice within 5 seconds. Latest firmware. It > also seems to increase over time a tadand I am not moving around on > frequency that much either. I am kinda addicted to running stations. > > Antenna is a Force-12 which is about .14 to 1.6. I really don't need to > use the tuner but I do. The 40 meter vee and the 80 mter vee do the same > thing when I run the antenna tuner. I do not on 40 CW and the 80 meter > dipole is tuned to mid band since I try to work both SSB and CW. All this > has bee checked by an antenna analyzer. > > Just asking another one of my brilliant questions... > > Lee - K0WA :>) > > > > > In our day and age it seems that Common Sense is in short supply. If you > don't have any Common Sense - get some Common Sense and use it. If you > can't find any Common Sense, ask for help from somebody who has some > Common Sense. Is Common Sense divine? > ___ > Elecraft mailing list > Post to: Elecraft@mailman.qth.net > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > -- View this message in context: http://n2.nabble.com/K3---Elecraft-Antenna-Tuner-KAT3-tp1129458p1129913.html Sent from the Elecraft mailing list archive at Nabble.com. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] K3 - Elecraft Antenna Tuner KAT3
Lee, I had the same problem. I redoing the Wattmeter 5 and 50 watt Calibrations and the Transmitter Gain Calibrations (for all bands) fixed the problem. Background: KAT3 worked after initial install. 1.0 SWR into a 40M dipole resonant in the CW end but tunable thru the SSB end and 1.0 into a 20 M vertical (1.2 SWR w/o tuner) at the CW end and 1.0 at the SSB end. After a power output problem with SSB on 40 and 80 was solved by a firmware upgrade the KAT3 degraded to the symptoms you described. It has been working FB since then, as has everything else. Renne at Elecraft recognized the symptoms immediately and walked me thru a few diagnostic steps to confirm the diagnoses. Have a dummy load ready and give him a call! Jack AE6GC _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lee Buller Sent: Tuesday, September 30, 2008 10:00 AM To: Elecraft Reflector Subject: [Elecraft] K3 - Elecraft Antenna Tuner KAT3 I am curious as to the experience of others on the list concerning the KAT3. Mine works find, but never finds that 1.0 to 1 match. It will find 1.2 or so (which is OK I know) but does not seem to find anything better. Yes, I do the tune procedure twice within 5 seconds. Latest firmware. It also seems to increase over time a tadand I am not moving around on frequency that much either. I am kinda addicted to running stations. Antenna is a Force-12 which is about .14 to 1.6. I really don't need to use the tuner but I do. The 40 meter vee and the 80 mter vee do the same thing when I run the antenna tuner. I do not on 40 CW and the 80 meter dipole is tuned to mid band since I try to work both SSB and CW. All this has bee checked by an antenna analyzer. Just asking another one of my brilliant questions... Lee - K0WA :>) In our day and age it seems that Common Sense is in short supply. If you don't have any Common Sense - get some Common Sense and use it. If you can't find any Common Sense, ask for help from somebody who has some Common Sense. Is Common Sense divine? ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] K3: Elecraft hand mike.
Ken, Yes, you need bias set on too - when in the MIC SEL menu, tap the '2' button to toggle the bias (the '1' button toggles between H and L - L is usually good for the MH2). 73, Don W3FPR Kenneth Waites wrote: I got the matching handmike, and no output. I have set mic sel FPL, and set mike gain 50. Is there something else required? Ken K5WK ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
