[Elecraft] Elecraft CW Net Announcement
Good Evening, The weather has gotten drier and more pleasant. The biting flies love it and my daily blood donations. More birds have returned so the forest is less quiet. With the temperature rise activity at the hummingbird feeder increased. Lots more bugs for them to eat too. "Eat the biting flies", I tell them but they ignore me. The sun has been spot-free this week. Comet SWAN displays the effects of the solar wind. I expect some QSB from it. But any ion injection is useful. Tomorrow we can test my assumptions. Please join us on (or near): 14050 kHz at 2200z Sunday (3 PM PDT Sunday) 7047 kHz at z Monday (5 PM PDT Sunday) 73, Kevin. KD5ONS _ __ 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] Headphones
I do want to understand what "must accept" means. Why did the FCC put #2 in there? I'm from the avionics industry. We have to not produce unwanted RF interference and we have to operate correctly in the presence of high levels of RF. Especially in recent years, someone could put their phone down on top of your unit and subject it to huge fields. We test in fields of hundreds of volts per meter and have to work. My products also have to work with 4V of ripple on the power input with no effect. Bose knows how to design for these environments. I was on regulatory committees with people from Bose and they were very sharp. So, if they are not obligated to fix this, I was just suggesting that they still might if contacted and that they have the knowledge to fix it. 73, Mark W7MLG On Sat, May 9, 2020 at 8:06 PM Phil Kane wrote: > On 5/9/2020 7:08 PM, Nr4c wrote: > > > Beg to differ. Part 15 devices have no legal protection from > interference. You use at your own risk. > > That's what I said. We deal with that professionally. > > >> (2) this device must accept any interference received, including > >>> interference that may cause undesired operation.-- > > Philip M. Kane Esq / P.E. - K2ASP > VP - General Counsel & Executive Engineer > CSI Telecommunications, Inc. - Consulting Engineers > San Francisco, CA - Beaverton, OR > __ > 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 marklgoldb...@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] Headphones
On 5/9/2020 7:08 PM, Nr4c wrote: Beg to differ. Ummm, K2ASP is a retired FCC inspector. Now works as a consultant to those who need help with communications systems issues. I think we can take anything he says to the bank. :) 73, Jim K9YC __ 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] Headphones
On 5/9/2020 7:08 PM, Nr4c wrote: > Beg to differ. Part 15 devices have no legal protection from interference. You use at your own risk. That's what I said. We deal with that professionally. >> (2) this device must accept any interference received, including >>> interference that may cause undesired operation.-- Philip M. Kane Esq / P.E. - K2ASP VP - General Counsel & Executive Engineer CSI Telecommunications, Inc. - Consulting Engineers San Francisco, CA - Beaverton, OR __ 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] Headphones
Beg to differ. Part 15 devices have no legal protection from interference. You use at your own risk. Sent from my iPhone ...nr4c. bill > On May 9, 2020, at 9:49 PM, Phil Kane wrote: > > On 5/9/2020 1:32 PM, Mark Goldberg wrote: > >> Have you contacted Bose? They are FCC part 15 and even say this in the user >> manual: > >> (2) this device must accept any interference received, including >> interference that may cause undesired operation. > Part 15 deals with *generating* unwanted RF (i.e. causing interference). > It has nothing to do with acceptability to external RF causing > malfunction. The excerpt that you posted is very clear on that point. > > 73 de K2ASP - Phil Kane > Elecraft K2/100 s/n 5402 > > From a Clearing in the Silicon Forest > Beaverton (Washington County) Oregon > __ > 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...@widomaker.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] Headphones
On 5/9/2020 1:32 PM, Mark Goldberg wrote: > Have you contacted Bose? They are FCC part 15 and even say this in the user > manual: > (2) this device must accept any interference received, including > interference that may cause undesired operation. Part 15 deals with *generating* unwanted RF (i.e. causing interference). It has nothing to do with acceptability to external RF causing malfunction. The excerpt that you posted is very clear on that point. 73 de K2ASP - Phil Kane Elecraft K2/100 s/n 5402 >From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon __ 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] CM500 headset on K3S and KX3?
I like 1/4 inch plugs too, but most rigs nowadays have 3.5mm jacks! You can use an adapter, but that forfeits the purpose. Bert VE3NR On 5/9/2020 5:40 PM, Dick Dievendorff wrote: This isn’t an endorsement from my company, but I’ve been real happy with my Inrad W1. It has a real 1/4 inch phone plug, robust and coiled cord longer than normal, it’s quite comfortable. I have not used the microphone much, but it’s been fine. Foam covered mike, easy to move out of the way. Replacement ear pads, should I ever need them, are $10. I find in longer contests that I like to change headsets to move the pressure points. So I have acquired several over the years. My old Sony MD-V is also a favorite for CW contests. Dick, K6KR On May 9, 2020, at 14:27, stephen shearer wrote: I purchased a Heil Prpset about the same time 2010+/- and they were leaving "black bits" around too. Yes, the Heil is more expensive. I was able to purchase new foam from the DC Store. I searched HRO and they had stock, if you knew the part number. I now have a new Headset... I DO like the HC4 element and the cotton ear pads... 73, steve WB3LGC On 5/6/20 12:53 PM, Walter Underwood wrote: My CM500’s earpads are flaking pretty badly, leaving little back bits around the home office/shack. They still work fine. __ 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...@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 ve...@bell.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] CM500 headset on K3S and KX3?
This isn’t an endorsement from my company, but I’ve been real happy with my Inrad W1. It has a real 1/4 inch phone plug, robust and coiled cord longer than normal, it’s quite comfortable. I have not used the microphone much, but it’s been fine. Foam covered mike, easy to move out of the way. Replacement ear pads, should I ever need them, are $10. I find in longer contests that I like to change headsets to move the pressure points. So I have acquired several over the years. My old Sony MD-V is also a favorite for CW contests. Dick, K6KR > On May 9, 2020, at 14:27, stephen shearer wrote: > > I purchased a Heil Prpset about the same time 2010+/- and they were leaving > "black bits" around too. Yes, the Heil is more expensive. I was able to > purchase new foam from the DC Store. I searched HRO and they had stock, if > you knew the part number. I now have a new Headset... I DO like the HC4 > element and the cotton ear pads... > 73, steve WB3LGC > >> On 5/6/20 12:53 PM, Walter Underwood wrote: >> My CM500’s earpads are flaking pretty badly, leaving little back bits around >> the home office/shack. They still work fine. > __ > 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...@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] CM500 headset on K3S and KX3?
I purchased a Heil Prpset about the same time 2010+/- and they were leaving "black bits" around too. Yes, the Heil is more expensive. I was able to purchase new foam from the DC Store. I searched HRO and they had stock, if you knew the part number. I now have a new Headset... I DO like the HC4 element and the cotton ear pads... 73, steve WB3LGC On 5/6/20 12:53 PM, Walter Underwood wrote: My CM500’s earpads are flaking pretty badly, leaving little back bits around the home office/shack. They still work fine. __ 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] Headphones
If the manual says the headphone must accept any interference, I doubt Bose will do much. John K7FD > On May 9, 2020, at 1:32 PM, Mark Goldberg wrote: > > Have you contacted Bose? They are FCC part 15 and even say this in the user > manual: > > This device complies with part 15 of the FCC Rules and with Industry Canada > license-exempt RSS standard(s). > Operation is subject to the following two conditions: (1) This device may > not cause harmful interference, and (2) this > device must accept any interference received, including interference that > may cause undesired operation. > > I think it is incumbent upon them to make them work. > > I know they have the capability. Their aircraft headsets have to operate in > very similar conditions. Aircraft have HF radios. > > I operate a station in our small RV with a KPA500 and a collection of other > electronics and bluetooth devices, with good bonding and ferrites in > hopefully the right places. Everything works with no issues. > > 73, > > Mark > W7MLG > >> On Sat, May 9, 2020 at 11:47 AM John Reilly wrote: >> >> FWIW, I bought a pair of the Bose 700 headphones, and I'm NOT happy. >> They are very susceptible to RF, especially on 40 and 80m. They make >> their system "bong" sound when I transmit. I have tried several toroid >> chokes, even one close to the ear piece -- no help. On 40m, I have the >> problem at power levels ranging from 5 to 1200 w. Too bad, they fit and >> sound great. >> - 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 marklgoldb...@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 macymonk...@charter.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] LP-PAN2 for sale
Hello again, LP-PAN2 has been sold. AB2TC - Knut ab2tc wrote > Hi all, > > LP-PAN2 with K3 crystal (serial# 02777) for sale, asking $150 shipped > Priority Mail. Power cable included. Includes audio cable suitable for > sound > card with 3.5mm TRS socket for audio, such as Asus U5, U7 and possibly > others. Sorry, no spare sound card available here. The audio cable is the > one once offered for sale by TelePost. It's a very neat cable solution. > Paypal preferred. > > Please contact me off line. I am good on qrz.com. > > AB2TC - Knut > > > > > -- > Sent from: http://elecraft.365791.n2.nabble.com/ > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto: > Elecraft@.qth > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to > lists+1215531472858-365791@.nabble -- Sent from: http://elecraft.365791.n2.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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Headphones
Have you contacted Bose? They are FCC part 15 and even say this in the user manual: This device complies with part 15 of the FCC Rules and with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. I think it is incumbent upon them to make them work. I know they have the capability. Their aircraft headsets have to operate in very similar conditions. Aircraft have HF radios. I operate a station in our small RV with a KPA500 and a collection of other electronics and bluetooth devices, with good bonding and ferrites in hopefully the right places. Everything works with no issues. 73, Mark W7MLG On Sat, May 9, 2020 at 11:47 AM John Reilly wrote: > FWIW, I bought a pair of the Bose 700 headphones, and I'm NOT happy. > They are very susceptible to RF, especially on 40 and 80m. They make > their system "bong" sound when I transmit. I have tried several toroid > chokes, even one close to the ear piece -- no help. On 40m, I have the > problem at power levels ranging from 5 to 1200 w. Too bad, they fit and > sound great. >- 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 marklgoldb...@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
[Elecraft] KPA1500 and noise
Ronnie - I sent the email quoted below to Elecraft Support on Mar 30 - have not received a reply so far- Hi - hope all is well with the folks at Elecraft. I haven't spent much time on 10M since receiving the KPA1500 in late 2018. Recently, I was working a small opening on 10 in the FT8 mode. I noticed the noise floor on the P3 (& S meter on the K3) go up from -130 to -115 or so when the KPA1500 was switched on. The 10M ant was pointed right at the shack. I found the thread on the mail reflector from Dec 2019 (partially quoted below) & tried all the suggestions offered, etc with no relief. The noise is definitely being picked up by the antenna. With a dummy load connected to Ant1 by 3' of LMR400, the P3 level is well below -130 with the amp either on or off. I then used a "RF sniffer" set for 28.2 Mhz calibrated in dBu to check the cabling, grounds, AC input cabling, etc. The source of the noise (measured 30 dBu +) was along the DC power cable to the Amp deck from the power supply. Other cables were below 10. The power cable is factory supplied, 6 Ft long, & approaching 1/4 wave at 28 Mhz. The serial # of my amp is 315. Any suggestions for remediation of this issue will be appreciated! I installed a #31 mix clamp-on ferrite right at the back of the Amp deck & it dropped the noise comsiderably. When moved down to the PS case, it did not help. Seems that noise is from the Amp deck & not PS. 73 Gill W4RYW __ 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] Headphones
That's a bummer. The wired Bose QC25’s show no signs of RFI while running my KPA500. I even bought a spare pair of QC25’s when the price was right. I do go through a few batteries...maybe two a month. The noise cancelling sure wipes out all ambient room noise, amplifier fan noise, TV, and conversations from an adjoining room. Very happy... John K7FD, locked down on the Oregon coast, wondering...waiting... > On May 9, 2020, at 11:46 AM, John Reilly wrote: > > FWIW, I bought a pair of the Bose 700 headphones, and I'm NOT happy. They are > very susceptible to RF, especially on 40 and 80m. They make their system > "bong" sound when I transmit. I have tried several toroid chokes, even one > close to the ear piece -- no help. On 40m, I have the problem at power levels > ranging from 5 to 1200 w. Too bad, they fit and sound great. > - 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 macymonk...@charter.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] Headphones
FWIW, I bought a pair of the Bose 700 headphones, and I'm NOT happy. They are very susceptible to RF, especially on 40 and 80m. They make their system "bong" sound when I transmit. I have tried several toroid chokes, even one close to the ear piece -- no help. On 40m, I have the problem at power levels ranging from 5 to 1200 w. Too bad, they fit and sound great. - 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 arch...@mail-archive.com
[Elecraft] PSK31, RTTY, and CW -- all conversational modes, all alive and kickin'
Recently we've been testing and enhancing the K4's built-in text decode/encode. This feature is very convenient on the K4, with multiple lines of received text, and the ability to use a keyboard (wired or wireless) at any of the three USB-A jacks. You can also transmit in any of these modes by sending CW with the keyer paddle. At present the K4 can handle PSK31, RTTY, and CW, as on our other transceivers. We hope to add other in-box text modes in the future. I was happy to discover lots of activity in all three modes over the past week. PSK31 -- which provides below-the-noise-floor copy -- is found primarily on 20 meters from 14070-14073, and I've also heard it on 80, 40, and 15 meters. RTTY is common (especially during weekend contests) around 14080-14090 or higher. And of course there's CW at all times of the day or night. Weekly CWT contests are a big draw these days. Each of these modes has its idiosyncrasies. But one thing they all have in common is that they're conversational -- you can carry on real QSOs. They can also be used in contests, with no "canned" limitations on exchanges as with heavily automated data modes. I encourage everyone to give these modes a try. If you have a K3, K3S, KX2, or KX3, you can use all three. Decoded text is scrolled across the VFO B display as signals are tuned in. (See your owner's manual for further details.) 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] KPA1500 and Noise
I'm only using port 1. I did find the ground in my circuit breaker box, well.. not loose really.. but got a couple of turns on it.. it actually made a 1 DB difference in the noise. May be on to something here. thanks for all the suggestions guys Ronnie -Original Message- From: Dauer, Edward Sent: Saturday, May 09, 2020 10:05 AM To: elecraft@mailman.qth.net ; w5...@comcast.net Subject: KPA1500 and Noise Which of the amp's antenna outputs are you using? When the KPA1500 is switched off the antenna is internally defaulted to connector number one. So if the noise is coming in via an antenna connected to number two, it should drop when power to the amp is turned off. Ted, KN1CBR -- Message: 6 Date: Fri, 8 May 2020 19:28:24 -0500 From: To: Subject: [Elecraft] KPA1500 and noise Message-ID: <362C6C03ECC34C00992DDFCC51D05C03@MININTMC1HLDC> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Recently I have noticed that I have a very high noise lever at my QTH, which I have never had. Today as I was shutting down my station I turned off the KPA1500 first, and my noise dropped from S7 to S1 instantly. I turned the Amp back on and the noise came back. Have any of you ever observed this? Thanks in advance Ronnie W5SUM -- ** __ 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
[Elecraft] KPA1500 and Noise
Which of the amp's antenna outputs are you using? When the KPA1500 is switched off the antenna is internally defaulted to connector number one. So if the noise is coming in via an antenna connected to number two, it should drop when power to the amp is turned off. Ted, KN1CBR -- Message: 6 Date: Fri, 8 May 2020 19:28:24 -0500 From: To: Subject: [Elecraft] KPA1500 and noise Message-ID: <362C6C03ECC34C00992DDFCC51D05C03@MININTMC1HLDC> Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original Recently I have noticed that I have a very high noise lever at my QTH, which I have never had. Today as I was shutting down my station I turned off the KPA1500 first, and my noise dropped from S7 to S1 instantly. I turned the Amp back on and the noise came back. Have any of you ever observed this? Thanks in advance Ronnie W5SUM -- ** __ 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] Monitor Swing Arms
and some have after market adapters for VESA but yes, do check cheers dink On 5/9/2020 1:17 AM, Bob DeHaney wrote: Before you buy, make sure your monitor has VESA mounting screw holes. Many do not. Vy 73 de Bob DJ0RD/WU5T __ 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 mwd...@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] KX-3 TX current draw?
Additional comments: Same test at 7MHz results with about 1A current. Suggesting KX3 power amplifier efficiency difference between 7 and 50 MHz. Using same DL1, added Elecraft W1 and MS utility to measure SWR. At 50 MHz KX3 displays SWR = 1.5 whereas W1 indicates SWR = 1.1:1. May I suggest W1 closer to instrument grade measurement than KX3 internal SWR measurement. John KN5L On 5/9/20 8:34 AM, John Oppenheimer wrote: > Hi Drew, > > 50 MHz TX constant 4 W carrier: > > KX3 #1658 > KX3 PS 13.2 during XMIT > ATU bypass > Elecraft DL1 > KX3 SWR 1.5 > Current = 2.3A __ 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] KX-3 TX current draw?
Hi Drew, 50 MHz TX constant 4 W carrier: KX3 #1658 KX3 PS 13.2 during XMIT ATU bypass Elecraft DL1 KX3 SWR 1.5 Current = 2.3A John KN5L On 5/8/20 6:52 PM, Mooneer Salem wrote: > I got 2.36A current consumption @ 5W using a dummy load and the TX button > on 50.100MHz USB with my KX3 (S/N 3262). The voltage dropped from 13.74V to > 13.67V during transmit. (Measured using an in-line Powerpole meter attached > between a 54Ah LiFePO4 battery and the KX3.) Hopefully this helps! __ 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 XMIT/TUNE button doesnt work
thanks Don I sent you a direct email but was rejected 554 5.7.1 [P4] Message blocked due to spam content in the message. 73, Jorge El vie., 8 may. 2020 a las 23:21, Don Wilhelm () escribió: > Jorge, > > I believe you have to replace the Button matrix pad. Contact > supp...@lcraft.com for more information and guidance. > > 73, > Don W3FPR > > On 5/8/2020 4:40 PM, Jorge Diez - CX6VM wrote: > > hello > > > > my K3 have a problem with this button. some weeks ago, I need to push it > > hard to have it working. > > > > Now doesnt work. Definitely is bad > > > > Any idea how to fix that? Hope is something easy I can solve locally > > > > thanks!! > -- 73, Jorge CX6VM/CW5W __ 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] KX-3 TX current draw?
Good point, Victor. And why I included that SWR reading. Other bands read fine. I have high confidence in the load and adapter (tried swapping both just in case). I could measure the load and adapter the next time I'm in the lab at work if I want to be absolutely thorough, but it is a microwave load and just adapting from BNC to N (no coax). SWR looks fine on other bands. Thanks, Drew n7da On Sat, May 9, 2020 at 4:57 AM Victor Rosenthal wrote: > > I think 1.6:1 is high for that kind of dummy load, if it's in good shape. > Should be close to 1:1. > Anyway, you can't really say there is a problem unless you have a better > match. Current draw is sensitive to mismatch. > -- > Vic > > On May 9, 2020 2:32:15 AM GMT+03:00, Drew Arnett > wrote: >> >> Walter, >> >> 50 MHz TX constant 4 W carrier measures 13.53 V on DMM (outside the DC >> power plug), 13.3 V on KX3 meter, 2.9 A on KX3 meter and 1.6 to 1 VSWR >> on KX3 meter. Microwave dummy load with BNC to N adapter. >> >> I didn't measure all of this when the rig was new, so have no baseline >> to know what is normal. :-( >> >> Thanks, >> >> Drew >> n7da >> >> On Fri, May 8, 2020 at 11:19 PM Drew Arnett wrote: >>> >>> >>> What do you see for current draw on the KX-3? Manual says 1 to 2 A >>> typical. >>> >>> I'm seeing 3 A at less than full power on one band. Yikes! Makes me >>> wonder if the repair shop is open? Elecraft website says hunkered >>> down and mostly work from home. >>> >>> Thanks and best regards, >>> >>> Drew >>> n7da >> >> >> 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 k2vco@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] KPA1500 and noise
Peter thanks 10M IS the band in question! Bonding is good, using 1/2” wide braided copper strAt for K3 and the power supply and kpa1500 are bonded together with the same! All equip is bonded to a 10” X 24” copper plate. That plate has #6 hard drawn copper cadwelded to it, the #6 going through the floor of shack only 36” and is cadwelded to a 8’ copper clad ground rod. I’ll check the SO239’s today Thanks all Ronnie W5Sum Sent from my iPhone > On May 9, 2020, at 4:43 AM, Peter Hall wrote: > > Folks, > > This was the thread I half recalled: excess noise on 10 m. See reply from > Eric re S0239 washers. May not be applicable to present case (not sure which > bands are involved) but worth a check. > > http://elecraft.365791.n2.nabble.com/KPA1500-RFI-on-10-Meters-td7657067.html#a7657213 > > 73, Peter. > > > -Original Message- > From: Dave > Sent: Saturday, 9 May 2020 10:43 AM > To: Peter Hall > Cc: w5...@comcast.net; Elecraft@mailman.qth.net > Subject: Re: [Elecraft] KPA1500 and noise > > Mine had noise on 80 meters. Elecraft sent me a load resistor to install in > the power supply across the 50 VDC terminals. Knocked the birdies down to the > noise floor. I also foo d there is a connection from the minus terminal to > the chassis that was loose. > > Serial number 423 and it has been working fine since. > > Dave wo2x > > Sent from my waxed string and tin cans. > >> On May 8, 2020, at 10:33 PM, Peter Hall wrote: >> >> I don't recall the details but have you read the posts by the Elecraft guys >> some weeks ago related to excess noise and loose grounding nuts (on or near >> the SO239 connectors if I recall correctly)? >> >> My KPA1500 creates a tiny amount of additional noise on 6 m when switched to >> "operate" but nothing discernible elsewhere. >> >> 73, Peter. >> >> -Original Message- >> From: elecraft-boun...@mailman.qth.net >> On Behalf Of w5...@comcast.net >> Sent: Saturday, 9 May 2020 8:41 AM >> To: rocke...@gmail.com; Elecraft@mailman.qth.net >> Subject: Re: [Elecraft] KPA1500 and noise >> >> only one antenna hooked to it, and that’s a sommer XP808 log fed yagi. No >> switches.! >> >> Ronnie W5SUM >> >> -Original Message- >> From: rocke...@gmail.com >> Sent: Friday, May 08, 2020 7:35 PM >> To: w5...@comcast.net ; Elecraft@mailman.qth.net >> Subject: RE: [Elecraft] KPA1500 and noise >> >> Need more details on what your antenna system is and especially what is >> connected to antenna 1 and 2 on the amp. >> Any antenna switches, etc. >> >> Dave wo2x >> >> >> >> -Original Message- >> From: elecraft-boun...@mailman.qth.net >> On Behalf Of w5...@comcast.net >> Sent: Friday, May 8, 2020 8:28 PM >> To: Elecraft@mailman.qth.net >> Subject: [Elecraft] KPA1500 and noise >> >> Recently I have noticed that I have a very high noise lever at my QTH, >> which I have never had. Today as I was shutting down my station I >> turned off the >> KPA1500 first, and my noise dropped from S7 to S1 instantly. >> >> I turned the Amp back on and the noise came back. Have any of you ever >> observed this? >> >> Thanks in advance >> >> Ronnie W5SUM >> >> __ >> 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 >> rocke...@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 >> p.h...@curtin.edu.au >> __ >> 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 >> rocke...@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] KPA1500 and noise
Folks, This was the thread I half recalled: excess noise on 10 m. See reply from Eric re S0239 washers. May not be applicable to present case (not sure which bands are involved) but worth a check. http://elecraft.365791.n2.nabble.com/KPA1500-RFI-on-10-Meters-td7657067.html#a7657213 73, Peter. -Original Message- From: Dave Sent: Saturday, 9 May 2020 10:43 AM To: Peter Hall Cc: w5...@comcast.net; Elecraft@mailman.qth.net Subject: Re: [Elecraft] KPA1500 and noise Mine had noise on 80 meters. Elecraft sent me a load resistor to install in the power supply across the 50 VDC terminals. Knocked the birdies down to the noise floor. I also foo d there is a connection from the minus terminal to the chassis that was loose. Serial number 423 and it has been working fine since. Dave wo2x Sent from my waxed string and tin cans. > On May 8, 2020, at 10:33 PM, Peter Hall wrote: > > I don't recall the details but have you read the posts by the Elecraft guys > some weeks ago related to excess noise and loose grounding nuts (on or near > the SO239 connectors if I recall correctly)? > > My KPA1500 creates a tiny amount of additional noise on 6 m when switched to > "operate" but nothing discernible elsewhere. > > 73, Peter. > > -Original Message- > From: elecraft-boun...@mailman.qth.net > On Behalf Of w5...@comcast.net > Sent: Saturday, 9 May 2020 8:41 AM > To: rocke...@gmail.com; Elecraft@mailman.qth.net > Subject: Re: [Elecraft] KPA1500 and noise > > only one antenna hooked to it, and that’s a sommer XP808 log fed yagi. No > switches.! > > Ronnie W5SUM > > -Original Message- > From: rocke...@gmail.com > Sent: Friday, May 08, 2020 7:35 PM > To: w5...@comcast.net ; Elecraft@mailman.qth.net > Subject: RE: [Elecraft] KPA1500 and noise > > Need more details on what your antenna system is and especially what is > connected to antenna 1 and 2 on the amp. > Any antenna switches, etc. > > Dave wo2x > > > > -Original Message- > From: elecraft-boun...@mailman.qth.net > On Behalf Of w5...@comcast.net > Sent: Friday, May 8, 2020 8:28 PM > To: Elecraft@mailman.qth.net > Subject: [Elecraft] KPA1500 and noise > > Recently I have noticed that I have a very high noise lever at my QTH, > which I have never had. Today as I was shutting down my station I > turned off the > KPA1500 first, and my noise dropped from S7 to S1 instantly. > > I turned the Amp back on and the noise came back. Have any of you ever > observed this? > > Thanks in advance > > Ronnie W5SUM > > __ > 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 > rocke...@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 > p.h...@curtin.edu.au > __ > 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 > rocke...@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
[Elecraft] Monitor Swing Arms
Before you buy, make sure your monitor has VESA mounting screw holes. Many do not. Vy 73 de Bob DJ0RD/WU5T __ 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] KPA1500 and noise
On 5/8/2020 5:28 PM, w5...@comcast.net wrote: I turned the Amp back on and the noise came back. Is your station properly bonded? It should be, for a lot of reasons, especially noise and safety. It's also the LAW! Study this tutorial. http://k9yc.com/GroundingAndAudio.pdf On 5/8/2020 5:41 PM, w5...@comcast.net wrote: > only one antenna hooked to it, and that’s a sommer XP808 log fed yagi. You should have a very good common mode choke at the feedpoint. Guidelines here. http://k9yc.com/2018Cookbook.pdf 73, Jim K9YC __ 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
