[Elecraft] [KXPA100] minimum drive?
What is the lowest drive for the KXPA100 (not to produce 100W, but for lower output), and is it possible to get the amp to run, when connected to a KX3, with a low output power of, say, 10 watts? I'm wondering about a situation where you'd like to have the KX3 putting out a watt or less to keep its temperature more stable and the drift down, and still have the KXPA100 in-line and producing perhaps 10-20 watts? Is that possible? Thanks and 73, Eric WD6DBM __ 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] Weird K2 behavior
Tom, Isolate the problem. What does the K2 display indicate? If that is correct and you can tune the K2 with the VFO knob, then you have a problem with the N3FJP program and should ask or support for that program. OTOH, if you cannot tune with the K2, open it up and do the VFO Range Tests for all band edges and we can likely help. As one wild guess - do you have the secondary menu parameter for D19 set properly? It should be y if the K60XV is installed, but must be n without the K60XV. If you have installed the rework eliminators, you need to set it as though the K60XV were installed. 73, Don W3FPR On 12/26/2013 12:05 AM, Tom Field wrote: I have a K2 7432 with the K100, KSB, KAF2 options, and have been using the serial port through a Keyspan adaptor with N3fjp logging software. It correctly reads the radio frequency on all bands except 40 meters where regardless of the radio frequency it only reads 7198 This is new behavior as well. Below is the data from the program: Any one have any other Ideas? Tom F. KI6NRD Rig Name = Elecraft Read Frequency Command = FA; Read Mode Command = MD; Convert To Hex = False Com Port Name = COM4 Baud Rate = 4800 Parity = None Stop Bits = 2 Data Bits = 8 Power Option = None Numeric Frequency = 7.198 String Frequency = 7.19800 Mode = SSB Polling Rig = True Polling Rate = 2000 Return Mode = True Return Frequency = False Mode From Frequency = False Version = Rig Interface Setup 1.2(Ctrl R) Buffer = MD1; __ 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/K2: cumulative HF xcvr review from eHam
Jim Brown-10 wrote The 7600 is also an RF trash generator -- clicks and phase noise abound. Not as bad as many others...Flex Radios the worst by far: Model QST Rx @20 kHz Tx @20 kHz Diff Tx Wide (-dBc) (-dBc) (dB) (-dBc) K3 Jan 09 112 (104) 119 -7 128@100kHz, 120@360kHz TS-599AT Aug 11 115 (93) 108 7 112@100kHz IC-7600 Nov 09 105 (100) 102 3 111@100kHz IC-7700 Oct 08 109 (105) 108 1 110@100kHz TS-590S May 11 120 (104) 106 14 110@100kHz KX3 Dec 12 120 (105) 97 23 107@100kHz IC-9100 Apr 12 101 101 0 105@100kHz FTdx5000 Dec 10 109 (104) 104 5 103@100kHz FT-950 Mar 08 86 (105) 100 -14 102@100kHz FTdx9000 Jul 10 114 101 13 100@100kHz FT-450D Nov 11 98 85 13 96@100kHz IC-7200 Jun 09 103 95 8 94@100kHz Flex-1500 Dec 11 107 (88) 101 6 81@300kHz Flex-5000A Jul 08 99 (96) 91 8 77@350kHz http://www.sm5bsz.com/dynrange/dubus313.pdf 73, Bill W4ZV -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-K2-cumulative-HF-xcvr-review-from-eHam-tp7582044p7582068.html Sent from the Elecraft 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] Noise Cancelling Headphones
Is there such a thing as a noise cancelling black box you can plug in a headset such as the CM-500 and get good noise canceling? No knobs. Just an ON-OFF switch like the headsets have. And thinking of the CM-500. Has anyone found a set of material covers that fit their ear covers? I would think they would be more comfortable than the plastic against your head. And they would look better than the pieces of paper towels I presently use when wearing the headphones for extended periods. :-) 73, N2TK, Tony -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary Smith Sent: Thursday, December 26, 2013 2:58 AM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Noise Cancelling Headphones I use the Bose QC-15 as about all I do is CW and the audio on these is wonderful. The noise cancelling though is almost 100% perfect; my old Alpha with its blower is 18 from my head and with the QC-15 on I can't but just barely tell the amp is on or off. I was thinking about getting a headset with a mic though Bose does make the A20 for pilots, at $1100 for what is essentially the QC-15 with a boom mic, I'll pass. They do make a A100T snap on mic for the QC15 but they are $250 for just the mic. I was referred by quite a few people here to check out the Yamaha CM500 for a fine mic, quick match to the K3 and comfortable headsets at $59. I'm so happy with the Bose QC15 that I'm going to keep using these and am going to need to figure out another way to get a mic into the K3 in a way that will be convenient for contesting should I ever decide to do a phone contest. I have an Electrovoice RE-10 which would probably be nice needs no power maybe I can make a clamp-on boom that I can remove from the desk once the contest is over. I also have several condenser mics but they are for recording and would be excess and just problematic for ham use. Anyone have any suggestion of a removable boom mic other than the A100T that will attach to the QC-15 and make it simple to use and then remove when the contest is over? I don't want to use velcro. Thanks 73, Gary KA1J --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.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
Re: [Elecraft] Noise Cancelling Headphones
I've never tried noise cancelling headphones, so my one question is, does anyone detect ANY effect to the desired audio? In other words, any Noise-Blanker effects or coloration of the audio? I would suppose that, since they're designed for music, the noise cancelling function is transparent, right? On the very few flights I've taken recently, I successfully used my old Sony MDR-7506's. Maybe I don't know what I'm missing by NOT using a noise cancelling set. 73, Charlie k3ICH - Original Message - From: Ron D'Eau Claire r...@cobi.biz To: elecraft@mailman.qth.net Sent: Thursday, December 26, 2013 2:25 AM Subject: Re: [Elecraft] Noise Cancelling Headphones True noise cancelling headphones will cut noise far, far beyond anything acoustic isolation from ear pads can accomplish. I have a pair of Audio-Technia QuierPoint ATH-ANC1. They are on ear types so I didn't recommend them to the person asking for ones that cover the ears. They are very comfortable for me. When I fly, as the roar and whine of the big jet engines invades the cabin, I just switch them on and all the racket becomes a quite background purr. I often wear them for the entire 11 hours from the west coast of the USA to Europe, even if I'm not listening to any programs. The active circuitry in true noise-cancelling phones inverts the sound arriving and so actually cancels it out. The circuit takes a few seconds to adapt so when the attendant brings my drink she has no trouble waking me. 73 Ron AC7AC __ 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] Noise Cancelling Headphones
The Bose QC15's are very nice for sure. The price, as with all Bose products, is way too high. I use them for CW/ digital contests and the CM-500's for phone contests. I like the CM-500's very much. They are very comfortable but do not have the isolation that one would want in a multi environment. Hope everyone had a very special Christmas day! 73, Randy N1KWF On Thu, Dec 26, 2013 at 8:30 AM, Charlie T, K3ICH pin...@erols.com wrote: I've never tried noise cancelling headphones, so my one question is, does anyone detect ANY effect to the desired audio? In other words, any Noise-Blanker effects or coloration of the audio? I would suppose that, since they're designed for music, the noise cancelling function is transparent, right? On the very few flights I've taken recently, I successfully used my old Sony MDR-7506's. Maybe I don't know what I'm missing by NOT using a noise cancelling set. 73, Charlie k3ICH - Original Message - From: Ron D'Eau Claire r...@cobi.biz To: elecraft@mailman.qth.net Sent: Thursday, December 26, 2013 2:25 AM Subject: Re: [Elecraft] Noise Cancelling Headphones True noise cancelling headphones will cut noise far, far beyond anything acoustic isolation from ear pads can accomplish. I have a pair of Audio-Technia QuierPoint ATH-ANC1. They are on ear types so I didn't recommend them to the person asking for ones that cover the ears. They are very comfortable for me. When I fly, as the roar and whine of the big jet engines invades the cabin, I just switch them on and all the racket becomes a quite background purr. I often wear them for the entire 11 hours from the west coast of the USA to Europe, even if I'm not listening to any programs. The active circuitry in true noise-cancelling phones inverts the sound arriving and so actually cancels it out. The circuit takes a few seconds to adapt so when the attendant brings my drink she has no trouble waking me. 73 Ron AC7AC __ 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 -- 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
Re: [Elecraft] Noise Cancelling Headphones
I use custom ear molds when on a long distance motorcycle rides. They do provide great isolation and are comfortable for long periods. I've been using the same set for 7 years with no issues. In addition to audiologists, vendors are usually at major motorcycle shows and sometimes at m'cycle shop (espec BMW) open houses. I still use the Yam headset with my new KX3 as I don't have a boom mic. The Yam works well for long periods too. Bill k4yjj The greatest isolation is achieved with custom ear molds, which you buy from an audiologist who fits them to your ear canal. __ 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] Noise Cancelling Headphones
I also really like the bose qc15 headphones and had been considering one of the add on microphones that are available, like Expensive one http://uflymike.com Or http://www.headsetbuddy.com/clearmic-noise-canceling-microphone-for-bose-qc15-headphones/ Or more generic http://www.modmic.com Or DIY http://www.freewebs.com/k1dg/boseheadphonemod.htm The qc15 comes with a mic as well but not a boom style, just on the cord like for iPhones. The qc15 was more comfortable for me in a 32 hour single op rtty contest than my other choices. The noise canceling does not have the hiss or the distortion of rtty side tone and noise like the cheaper noise canceling 'phones do. I have decided for my limited ssb operation I think my cm500 or heil proset will do just fine. (Well at least for now) Mark. N2QT On Dec 26, 2013, at 2:57 AM, Gary Smith g...@ka1j.com wrote: I use the Bose QC-15 as about all I do is CW and the audio on these is wonderful. The noise cancelling though is almost 100% perfect; my old Alpha with its blower is 18 from my head and with the QC-15 on I can't but just barely tell the amp is on or off. I was thinking about getting a headset with a mic though Bose does make the A20 for pilots, at $1100 for what is essentially the QC-15 with a boom mic, I'll pass. They do make a A100T snap on mic for the QC15 but they are $250 for just the mic. I was referred by quite a few people here to check out the Yamaha CM500 for a fine mic, quick match to the K3 and comfortable headsets at $59. I'm so happy with the Bose QC15 that I'm going to keep using these and am going to need to figure out another way to get a mic into the K3 in a way that will be convenient for contesting should I ever decide to do a phone contest. I have an Electrovoice RE-10 which would probably be nice needs no power maybe I can make a clamp-on boom that I can remove from the desk once the contest is over. I also have several condenser mics but they are for recording and would be excess and just problematic for ham use. Anyone have any suggestion of a removable boom mic other than the A100T that will attach to the QC-15 and make it simple to use and then remove when the contest is over? I don't want to use velcro. Thanks 73, Gary KA1J --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.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
Re: [Elecraft] Noise Cancelling Headphones
Tony, I'm using the Heill covers that others use for the headset pro on my CM500 98% fit. 73 Arie PA3A N2TK, Tony schreef op 26-12-2013 14:20: Is there such a thing as a noise cancelling black box you can plug in a headset such as the CM-500 and get good noise canceling? No knobs. Just an ON-OFF switch like the headsets have. And thinking of the CM-500. Has anyone found a set of material covers that fit their ear covers? I would think they would be more comfortable than the plastic against your head. And they would look better than the pieces of paper towels I presently use when wearing the headphones for extended periods. :-) 73, N2TK, Tony __ 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] Wanted P3
Still looking for P3 Regards Bozidar -- View this message in context: http://elecraft.365791.n2.nabble.com/Wanted-P3-tp7581595p7582075.html Sent from the Elecraft 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] Noise Cancelling Headphones
The noise pickup must be very close to the ear piece to allow proper and constant phase for effective canceling. Having a separate box would mean the phase would change if you moved your head so would't work. I haven't noticed any noise blanker effect. There are surely minor errors in the canceling process but Bose seems the have it pretty well worked out. iPod music is great through them even at 4 ft. :-) Brian , K0DTJ On Dec 26, 2013, at 5:20, N2TK, Tony tony@verizon.net wrote: Is there such a thing as a noise cancelling black box you can plug in a headset such as the CM-500 and get good noise canceling? No knobs. Just an ON-OFF switch like the headsets have. __ 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] Noise Cancelling Headphones
These have caught my eye at my local Costco recently: http://www.costco.com/Sony-MDR-10RDC-Premium-Noise-Canceling-Headphones.product.100083695.html but I keep reminding myself that I have too many headsets already :) The reviews seem decent. They probably don't have the same construction quality as your MDR-V6's (guessing), but may be worth checking out if you're a member, or know someone who is... 73, ~iain / N6ML On Wed, Dec 25, 2013 at 2:16 PM, Joel Black w4...@charter.net wrote: I am looking for a pair of noise cancelling headphones. I have a pair of Sony MDR-V6's that I love, but they do not have noise cancelling capability and my wife's embroidery machine is severely limiting my radio operations. I have already looked at the Yamaha CM500's because they come so highly recommended on this group. If they're noise cancelling, I cannot find that information about them. I want something that will last. The MDR-V6's have lasted at least 10 years if not longer. I've only had to replace the earpads. I want something that *covers* my ear *not* something that sits *on* my ear. Those that sit *on* my ears are uncomfortable after a very short while. Merry Christmas and 73, Joel - W4JBB __ 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] Noise Cancelling Headphones
The audio seems just fine on typical aircraft program material with no obvious distortion to my tin ears. The fact that I can turn the program volume down to normal levels and hear just fine or end the constant, high dB assault on my ears when I'm not listening at all is the overriding factor to me. Fortunately I have a very quiet shack so I've never used them there. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Charlie T, K3ICH Sent: Thursday, December 26, 2013 5:30 AM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] Noise Cancelling Headphones I've never tried noise cancelling headphones, so my one question is, does anyone detect ANY effect to the desired audio? In other words, any Noise-Blanker effects or coloration of the audio? I would suppose that, since they're designed for music, the noise cancelling function is transparent, right? On the very few flights I've taken recently, I successfully used my old Sony MDR-7506's. Maybe I don't know what I'm missing by NOT using a noise cancelling set. 73, Charlie k3ICH __ 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] Ever had a WOW moment?
Howdy Gang: As the subject says, have you ever had a WOW moment using QRP on the bands?? I just did as I answered a very weak response to my CQ on 21.060 at 1613Z. G3YPZ called and I couldn't really couldn't copy much until I got him zero beat and turned on the APF in my KX3. Finally got his call and then copied just about 100% of his transmissions from then on. Turns out that John was running a K3 at 100mw!! Of course the fact that he had a 2 element quad certainly helped but I can't recall ever working a DX station when he was running so little power. Solar Flux today is only at 123 so condx not great but 15m can be magical at times. This QRP stuff is amazing...we can be thankful to Wayne and Eric for such superb equipment that allow us to work farther with less these days. I harken back to my beginning days as a Novice with a homebrew 6V6 and S77 Hallicrafters receiver...amazing that I made any QSOs back then in 1962!! 73, Joe W2KJ I QRP, therefore I am __ 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] Noise Cancelling Headphones
I just read the second page of reviews, and there are a couple of complaints about picking up FM broadcast radio stations. That may be a bad sign! I have the old Heil ProSet QuietPhone (with the NC lump in the cord), which was horribly susceptible to RFI. Something to look out for on any model you choose. At least with the Costco one, you can return it to the store if it doesn't work out... 73, ~iain / N6ML On Thu, Dec 26, 2013 at 8:17 AM, iain macdonnell - N6ML a...@dseven.org wrote: These have caught my eye at my local Costco recently: http://www.costco.com/Sony-MDR-10RDC-Premium-Noise-Canceling-Headphones.product.100083695.html but I keep reminding myself that I have too many headsets already :) The reviews seem decent. They probably don't have the same construction quality as your MDR-V6's (guessing), but may be worth checking out if you're a member, or know someone who is... 73, ~iain / N6ML On Wed, Dec 25, 2013 at 2:16 PM, Joel Black w4...@charter.net wrote: I am looking for a pair of noise cancelling headphones. I have a pair of Sony MDR-V6's that I love, but they do not have noise cancelling capability and my wife's embroidery machine is severely limiting my radio operations. I have already looked at the Yamaha CM500's because they come so highly recommended on this group. If they're noise cancelling, I cannot find that information about them. I want something that will last. The MDR-V6's have lasted at least 10 years if not longer. I've only had to replace the earpads. I want something that *covers* my ear *not* something that sits *on* my ear. Those that sit *on* my ears are uncomfortable after a very short while. Merry Christmas and 73, Joel - W4JBB __ 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] Out of band limits
IS there a way to shut off the out of band transmit limits in the K3? I'm down in the Caribbean trying to fine tune my antennas and it's impossible to do with the limiter in place. [Nb. Yeah I'm sure some smart guy on frequency will say fly home and get my autek bridge.] Dr. William J. Schmidt - K9HZ / J68HZ/ 8P6HK/ ZF2HZ/ PJ4/K9HZ Owner - Operator Big Signal Ranch Staunton, Illinois email: mailto:b...@wjschmidt.com b...@wjschmidt.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] [K2] Safely running 100% key-down modes
I starting to use my K2/100 in two 100% key-down modes, JT-65 and PSK-31. What should I be keeping in mind in protecting the output stage for the K2 and for the KPA100? For JT-65, since it is a QRP mode, I'm running at about 5 watts, and transmissions are limited to about 45 seconds. So, I'm hoping that K2's output transistors will not be stressed in this mode. But, how about PSK-31? I'd like to run about 20 watts and each transmission could easily be 3 or so minutes. I don't know at what output power the base K2 runs when the KPA100 kicks in (i.e., at above 10 watts). I assume that normally the KPA100 will be loafing at 20 watts, but I'm not sure the impact of 100% key down on its output stage. I'd appreciate any guidance in keeping the K2/100 safe in these modes. Thanks - Bruce K1FFX - Bruce Rosen K1FFX K2/100 6982 KSB2 KAT100-1 -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Safely-running-100-key-down-modes-tp7582081.html Sent from the Elecraft 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] Ever had a WOW moment?
15 meters is a very overlooked band in my opinion. Its open way more than 10 meters. Its quiet, lots of room. Easy 23 foot dipole antenna and a KX3 and you are working the world, CW or SSB. And if you can get 48 feet of wire loop up somewhere, you will be astonished. I can always find DX CW on 15 mtrs. 73 Leroy AB7CE -Original Message- From: Joe W2KJ Subject: [Elecraft] Ever had a WOW moment? Solar Flux today is only at 123 so condx not great but 15m can be magical at times. __ 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] [KXPA100] minimum drive?
When you turn PA.MODE ON, we use the KX3 alone for power levels up to 10 or 12 watts, and then enable amplification above 10 watts. The KX3's power knob ranges from 0 to around 100 watts with PA MODE ON. However you can turn KX3 PA MODE OFF and set the KX3 output power for the desired KXPA100 output. You can do this with any QRP transceiver. You may find the drive adjustment a little touchy for very low amplified output levels. 73 de Dick, K6KR -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of eric norris Sent: Thursday, December 26, 2013 1:41 AM To: elecraft@mailman.qth.net Subject: [Elecraft] [KXPA100] minimum drive? What is the lowest drive for the KXPA100 (not to produce 100W, but for lower output), and is it possible to get the amp to run, when connected to a KX3, with a low output power of, say, 10 watts? I'm wondering about a situation where you'd like to have the KX3 putting out a watt or less to keep its temperature more stable and the drift down, and still have the KXPA100 in-line and producing perhaps 10-20 watts? Is that possible? Thanks and 73, Eric WD6DBM __ 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] K3 and Micrometer II help
Hi, I just hooked up my Microkeyer 2 installed all software and the software is communicating with the radio. However if I talk into my Mike there is no transmit occurring via Vox or PTT on the radio. Pi am using a Heil preset as received from Elecraft. I have the k3 front mic cable. I have the wire marked line in on the cable to the line in on the radio. Same for line out. I have set jumpers to non electret. Can someone tell me what I am doing wrong.? Thanks __ 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] Noise Cancelling Headphones
On 12/25/2013 11:57 PM, Gary Smith wrote: I have an Electrovoice RE-10 which would probably be nice needs no power Being a retired audio pro who has done a lot of recording, I have a lot of pro mics, including several RE16s. Before I discovered the CM500 (thanks to W6XU, another audio pro), I used an RE16 in my ham station on a boom stand. It worked quite well. The hookup of a pro dynamic mic to ham gear is very simple. Pro mics are wired balanced via shielded twist pair cable to a three-pin connector called an XL. Pin 1 is the shield, Pin 2 is high, Pin 3 is return. To connect a dynamic mic like the RE10, wire Pin 2 to mic in on the rig, wire Pin 3 to mic return on the rig, and connect Pin 1 to the chassis. I made up some adapters for the various rigs that I used that mic with. Nearly all ham mics have a peaked response in the range of 3 kHz to compensate for the rolloff of SSB filters, both on RX and TX. This was, I believe, first developed by Shure about 40 years ago, and you can see it in the response of their communications mics. Pro mics don't have this peak (or if they do, it's in the range of 8-10 kHz), so TXEQ must be adjusted to provide that peak. I used the same low frequency rolloff for the RE10 that I use now for the CM500 -- the three lowest frequency bands max cut, the fourth cut by about half, tweaked by ear based on the reports of a known good listener. For the high end, I boosted the top band by about 10 dB, the next highest band by a few dB, again tweaked on the basis of reports from a good listener. With rigs other than a K3 that don't have TXEQ, I added a capacitor in series with the mic wiring to the rig input and a resistor between the rig mic input and mic signal return. The resistor was about 470 ohms, and the capacitor value was chosen so that the network produced a strong rolloff below 2 kHz -- in other words, a sloped response that peaked around 3 kHz. I got very good audio reports from this simple setup with a TS850, an Omni V, an FT1000MP, and a K2. I modified the K2 to add a low frequency rolloff around 400 Hz also to increase the mic gain by about 6 dB. I did this simply by changing the values of a few resistors and capacitors early in the audio signal chain. The purpose of the mod was simple -- with most ham mics, the K2 is a bit low on gain, so I wanted to hit the limiter harder. I also wanted to minimize the wasted LF energy, and also prevent that LF energy from activating the limiter. 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
Re: [Elecraft] K3 and Micrometer II help
Pi am using a Heil preset as received from Elecraft. I have the k3 front mic cable. I have the wire marked line in on the cable to the line in on the radio. Same for line out. I have set jumpers to non electret. Can someone tell me what I am doing wrong.? Elecraft ProSet has an ELECTRET mic you need to set the jumpers in MKII for electret in order to supply the necessary power to the mic element and then perform the audio level set-up as documented in the MKII Users Manual. 73, ... Joe, W4TV On 12/26/2013 12:37 PM, Tom wrote: Hi, I just hooked up my Microkeyer 2 installed all software and the software is communicating with the radio. However if I talk into my Mike there is no transmit occurring via Vox or PTT on the radio. Pi am using a Heil preset as received from Elecraft. I have the k3 front mic cable. I have the wire marked line in on the cable to the line in on the radio. Same for line out. I have set jumpers to non electret. Can someone tell me what I am doing wrong.? Thanks __ 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] Ever had a WOW moment?
Very good! Wish I had a KX3 with me so I could work you as G0PWW! On Thu, Dec 26, 2013 at 12:18 PM, lmar...@mt.net wrote: 15 meters is a very overlooked band in my opinion. Its open way more than 10 meters. Its quiet, lots of room. Easy 23 foot dipole antenna and a KX3 and you are working the world, CW or SSB. And if you can get 48 feet of wire loop up somewhere, you will be astonished. I can always find DX CW on 15 mtrs. 73 Leroy AB7CE -Original Message- From: Joe W2KJ Subject: [Elecraft] Ever had a WOW moment? Solar Flux today is only at 123 so condx not great but 15m can be magical at times. __ 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 -- 73 de Ted Edwards, W3TB and GØPWW and thinking about operating CW: Do today what others won't, so you can do tomorrow what others can't. __ 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/K2: cumulative HF xcvr review from eHam
On 12/26/2013 4:36 AM, Bill W4ZV wrote: The 7600 is also an RF trash generator -- clicks and phase noise abound. Not as bad as many others...Flex Radios the worst by far: That does not consider clicks -- most if not all Icom radios have a leading spike, and the keying rise time on the 7600 is adjustable over a wide range, most settings of which produce broad clicks. Can't speak to the Flex radios -- so far, I've not lived close to one. Thanks for the link to the SM5BSZ review. Your copy of the table doesn't work very well in email, but the data in Leif's report is quite clear. It says that the 7600 is 11dB worse than the K3 -- that's 12X the power of the trash within 20 kHz for phase noise alone! 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
Re: [Elecraft] Out of band limits
On 12/26/2013 8:49 AM, Dr. William J. Schmidt, II wrote: IS there a way to shut off the out of band transmit limits in the K3? I'm down in the Caribbean trying to fine tune my antennas and it's impossible to do with the limiter in place. I'm sure it's do-able -- the MARS folks do it all the time. (Disclaimer - I don't own a K3 so I could be 100% wrong.) [Nb. Yeah I'm sure some smart guy on frequency will say fly home and get my autek bridge.] Probably cheaper to order another one as long as UPS/FedEx gets their act together. :) 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
Re: [Elecraft] K3/K2: cumulative HF xcvr review from eHam
On 12/26/2013 10:04 AM, Jim Brown wrote: It says that the 7600 is 11dB worse than the K3 -- that's 12X the power of the trash within 20 kHz for phase noise alone! Correction -- the 7600 is 17 dB worse than the K3, 50X the power of the trash from phase noise. 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
Re: [Elecraft] Noise Cancelling Headphones
On 12/26/2013 8:17 AM, iain macdonnell - N6ML wrote: These have caught my eye at my local Costco recently: http://www.costco.com/Sony-MDR-10RDC-Premium-Noise-Canceling-Headphones.product.100083695.html but I keep reminding myself that I have too many headsets already :) Is it worth 180 bucks? 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
Re: [Elecraft] Noise Cancelling Headphones
On Thu, Dec 26, 2013 at 10:21 AM, Phil Kane k2...@kanafi.org wrote: On 12/26/2013 8:17 AM, iain macdonnell - N6ML wrote: These have caught my eye at my local Costco recently: http://www.costco.com/Sony-MDR-10RDC-Premium-Noise-Canceling-Headphones.product.100083695.html but I keep reminding myself that I have too many headsets already :) Is it worth 180 bucks? Maybe, if you operate in a noisy environment. The Bose QC15 that others are raving about sells for ~$270 ! 73, ~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] Noise Cancelling Headphones
Re: Is there such a thing as a noise cancelling black box you can plug in aheadset such as the CM-500 and get good noise canceling? No knobs. Just anON-OFF switch like the headsets have. Well, sort of, Tony. In the aviation world, conversions kits have been marketed for popular (in aviation circles) headsets to convert them to noise canceling. They weren't black box plug-in devices, but rather a kit of microphones and electronics mounted in each earpiece and required some disassembly of the existing earpieces. I believe they were made for David Clark and Flightcom headsets, and maybe a few others. The result was a significant improvement over the original passive headsets, but not as good as a good pair of noise canceling headsets. I don't know if they are still available. I suspect the low end of the noise canceling headset market has displaced them. Mark KE6BB From: N2TK, Tonytony@verizon.net Sent: Thu, Dec 26, 2013 at 5:20 AM To: Elecraft@mailman.qth.net Subject: Re: [Elecraft] Noise Cancelling Headphones Is there such a thing as a noise cancelling black box you can plug in aheadset such as the CM-500 and get good noise canceling? No knobs. Just anON-OFF switch like the headsets have.And thinking of the CM-500. Has anyone found a set of material covers thatfit their ear covers? I would think they would be more comfortable than theplastic against your head. And they would look better than the pieces ofpaper towels I presently use when wearing the headphones for extendedperiods. :-)73,N2TK, Tony-Original Message-From: elecraft-boun...@mailman.qth.net[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary SmithSent: Thursday, December 26, 2013 2:58 AMTo: elecr...@mailman.qth.netSubject: Re: [Elecraft] Noise Cancelling HeadphonesI use the Bose QC-15 as about all I do is CW and the audio on these iswonderful. The noise cancelling though is almost 100% perfect; my old Alphawith its blower is 18 from my head and with the QC-15 on I can't but just barely tell the amp is on or off. I was thinking about getting a headset with a mic though Bose does makethe A20 for pilots, at $1100 for what is essentially the QC-15 with a boommic, I'll pass. They do make a A100T snap on mic for theQC15 but they are $250 for just the mic. I was referred by quite a fewpeople here to check out the Yamaha CM500 for a fine mic, quick match to theK3 and comfortable headsets at $59. I'm so happy with the Bose QC15 that I'm going to keep using these and amgoing to need to figure out another way to get a mic into theK3 in a way that will be convenient for contesting should I ever decide todo a phone contest. I have an Electrovoice RE-10 which would probably benice needs no power maybe I can make a clamp-on boom that I can remove from the desk once the contest is over. I also have several condenser mics but they are for recording and would be excessand just problematic for ham use.Anyone have any suggestion of a removable boom mic other than the A100T thatwill attach to the QC-15 and make it simple to use and then remove when thecontest is over? I don't want to use velcro.Thanks 73,GaryKA1J---This email is free from viruses and malware because avast! Antivirusprotection is active.http://www.avast.com__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.html__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.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] [K2] Safely running 100% key-down modes
Bruce, The base K2 power is proportional to the power out of the KPA100 - so if the KPA100 is running at 20 watts, the base K2 is driving at about 2 watts. You can run 100% duty cycle transmissions safely at 35 watts, and could probably push it to 50 watts if you provide auxiliary cooling for the KPA100 and the receive periods are long enough to allow the heatsink to cool. You could increase the cooling by placing a muffin fan over the heat sink. It is heat that will create problems - you can always use your fingers as an indicator. If the surface of the heat sink is too hot to hold your fingers on it, it is likely too hot. Don't forget that the base K2 PA transistors are on the bottom rear. 73, Don W3FPR On 12/26/2013 12:06 PM, K1FFX wrote: I starting to use my K2/100 in two 100% key-down modes, JT-65 and PSK-31. What should I be keeping in mind in protecting the output stage for the K2 and for the KPA100? For JT-65, since it is a QRP mode, I'm running at about 5 watts, and transmissions are limited to about 45 seconds. So, I'm hoping that K2's output transistors will not be stressed in this mode. But, how about PSK-31? I'd like to run about 20 watts and each transmission could easily be 3 or so minutes. I don't know at what output power the base K2 runs when the KPA100 kicks in (i.e., at above 10 watts). I assume that normally the KPA100 will be loafing at 20 watts, but I'm not sure the impact of 100% key down on its output stage. I'd appreciate any guidance in keeping the K2/100 safe in these modes. __ 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] Noise Cancelling Headphones
On 12/26/2013 10:39 AM, Mark Petiford wrote: Re: Is there such a thing as a noise cancelling black box you can plug in aheadset such as the CM-500 and get good noise canceling? No knobs. Just anON-OFF switch like the headsets have. Well, sort of, Tony. In the aviation world, conversions kits have been marketed for popular (in aviation circles) headsets to convert them to noise canceling. They weren't black box plug-in devices, but rather a kit of microphones and electronics mounted in each earpiece and required some disassembly of the existing earpieces. I believe they were made for David Clark and Flightcom headsets, and maybe a few others. The result was a significant improvement over the original passive headset Right. Successful noise cancelling requires that the resulting acoustic output AS COUPLED TO THE EAR CANAL precisely match the acoustic noise that GETS THROUGH THE HEADPHONES TO THE EAR CANAL (caps added for emphasis) in both magnitude and phase, and that the two acoustic signals are out of polarity. That means that the mic picking up the noise be very close to the headphones, the distance between the mic, the transducer, and the ear must be compensated, and the relative response, both magnitude and phase, must be precisely compensated. That's a VERY difficult design problem, and a really good solution is only practical when everything is built as an integrated package, with dedicated mic, headphone transducers, and electronics. 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
Re: [Elecraft] Noise Cancelling Headphones
Jim, I'd worry about sudden surges of high-intensity audio. They happen even in the best families. Your ears could be badly damaged before you could yank the Etymotics out. I'd never, ever use in-ear headphones in a ham-rig setting. Oliver W6ODJ On 25 Jan. 2013, at 20:40 PM, Jim Brown j...@audiosystemsgroup.com wrote: On 12/25/2013 8:22 PM, Randy Farmer wrote: The Radiosport RS 20 headphones are the way to go. They're not cheap, but they really do the job. They have NO electronic circuitry to give RFI problems, just 24 dB of noise reduction due to their excellent acoustic isolation. I tried them, and found them to be VERY VERY uncomfortable, to the point of being instruments of torture. I'm a contester, and often am in the chair for 20-30 hours in a weekend. I couldn't wear the Radiosport cans for an hour. I'd rate the acoustic seal of CM500s comparable to Sony MDR7506 / MDR-V6, all of which I've owned and like a lot. In other words, if you're not happy with the MDR-V6, you won't be happy with the CM500. :) I have heard that east coast contesters love the Bose noise cancelling headphones, but I've never heard them. I did try a pair of Sennheiser noise cancelling headphones almost 20 years ago, and they seemed to work, but I wasn't being critical, and that was 20 years ago. :) The best, and most comfortable, noise isolating headphones I know of are the Etymotic Research ER4-series in-ear earsets, I own two pairs, and wore out one of the cables. They come with 3-4 generic ear fittings, and I found one of them to work well for me -- good isolation and comfort. Cost was about $200 eight years ago when I bought them. The greatest isolation is achieved with custom ear molds, which you buy from an audiologist who fits them to your ear canal. 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 __ 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] Noise Cancelling Headphones
On 12/26/2013 11:06 AM, Oliver Johns wrote: I'd worry about sudden surges of high-intensity audio. YES -- this is why I consider turning off AGC a really bad idea, especially in a contesting environment where you have the RF gain cranked to copy a very weak station and a guy calls you with a signal well over S9. They happen even in the best families. Your ears could be badly damaged before you could yank the Etymotics out. I'd never, ever use in-ear headphones in a ham-rig setting. Absolutely no difference between in-ear and circumaural to the extent that the transducers are linear. 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
[Elecraft] Out of band limits.
Yes there is a solution, it is software and might have to have hardware installed. Best to get ahold of Elecraft and ask them. Best regards, Jerry, W1IE __ 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] Noise Cancelling Headphones
On 12/26/2013 11:02 AM, Jim Brown wrote: Successful noise cancelling requires that the resulting acoustic output AS COUPLED TO THE EAR CANAL precisely match the acoustic noise that GETS THROUGH THE HEADPHONES TO THE EAR CANAL (caps added for emphasis) in both magnitude and phase, and that the two acoustic signals are out of polarity. That means that the mic picking up the noise be very close to the headphones, the distance between the mic, the transducer, and the ear must be compensated, and the relative response, both magnitude and phase, must be precisely compensated. That's a VERY difficult design problem, and a really good solution is only practical when everything is built as an integrated package, with dedicated mic, headphone transducers, and electronics. That, and the miniaturization and customization involved, is why my hearing assistance devices (high-end Phonak behind-the ear hearing aids) cost $3000 per ear. I have yet to try conventional large-cuff headphones since I got those aids three plus years ago. I use a streaming audio adapter that Bluetooth-couples to the aids. It doesn't solve the noise problem but is more comfortable. That works with my K2 just fine! For data modes (RTTY/PSK/SITOR) I work quiet room (RX AF volume at minimum) and use the waterfall as my tuning aid. -- 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
Re: [Elecraft] Noise Cancelling Headphones
Jim, It takes longer to gouge in-ear phones out of your ear canal than it does to fling off a pair of over-ear cans. That's the problem. A piece of radio gear may at any instant decide to go ballistic and produce a loud buzz or whistle that can damage you. Keeping the AGC on is not a certain protection. Oliver W6ODJ On 26 Jan. 2013, at 11:15 AM, Jim Brown j...@audiosystemsgroup.com wrote: On 12/26/2013 11:06 AM, Oliver Johns wrote: I'd worry about sudden surges of high-intensity audio. YES -- this is why I consider turning off AGC a really bad idea, especially in a contesting environment where you have the RF gain cranked to copy a very weak station and a guy calls you with a signal well over S9. They happen even in the best families. Your ears could be badly damaged before you could yank the Etymotics out. I'd never, ever use in-ear headphones in a ham-rig setting. Absolutely no difference between in-ear and circumaural to the extent that the transducers are linear. 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 __ 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] Noise Cancelling Headphones
On 12/26/2013 1:00 PM, Oliver Johns wrote: It takes longer to gouge in-ear phones out of your ear canal than it does to fling off a pair of over-ear cans. How do you know that? Have you tied both? I have, and I have NOT found this to be true. Further, I can grab the audio gain control as quickly as I can remove headphones. The simple solution is to set up and operate the radio so that it does not blast you with levels that can produce hearing loss. I worked many years in pro audio, and this is something all of us have had to be quite conscious of. 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
Re: [Elecraft] [K2] Safely running 100% key-down modes
I run JT9 and JT65 very frequently with the K2/100. Most of the time, I run 5 watts. If needed I'll crank it up to 20 watts, so I can assure you it's quite safe at that power level. When the linear kicks in the K2 drive power to the linearis proportional, so if you are within the duty cycle of the linear, you are within the duty cycle of the K2 barefoot. At 20 watts the fan usually comes on after about 30 seconds of TX and stays on for the remainder of the TX cycle and much of the RX cycle. At around 25-30 watts, the fan is on all the time, but I don't ever run it that high. The JT modes are meant for weak signals so I only work weak signals and find that at 15-20 watts I'm giving very close to the same signal report I receive. For PSK, I stick to the same power levels as JT modes. I don't run PSK very often because it's not as interesting to me. I lost patience with brag tapes in the RTTY days. Now they provide model numbers of every rig, every radio accessory and every computer specification including version numbers of software even if they aren't using that gear for the QSO. Sort of a shopping list for burglars. The K2 does a very nice job with all the digital modes. Eric KE6US On 12/26/2013 9:06 AM, K1FFX wrote: I starting to use my K2/100 in two 100% key-down modes, JT-65 and PSK-31. What should I be keeping in mind in protecting the output stage for the K2 and for the KPA100? For JT-65, since it is a QRP mode, I'm running at about 5 watts, and transmissions are limited to about 45 seconds. So, I'm hoping that K2's output transistors will not be stressed in this mode. But, how about PSK-31? I'd like to run about 20 watts and each transmission could easily be 3 or so minutes. I don't know at what output power the base K2 runs when the KPA100 kicks in (i.e., at above 10 watts). I assume that normally the KPA100 will be loafing at 20 watts, but I'm not sure the impact of 100% key down on its output stage. I'd appreciate any guidance in keeping the K2/100 safe in these modes. Thanks - Bruce K1FFX - Bruce Rosen K1FFX K2/100 6982 KSB2 KAT100-1 -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-Safely-running-100-key-down-modes-tp7582081.html Sent from the Elecraft 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 __ 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] Extreme Isolation headphones FS
I have a pair of Direct Sound EX-29 headphones surplus to my needs. Low hours use, condition excellent. more info here http://www.extremeheadphones.com/products/ex-29-headphones Asking $75 plus $10 postage. 73, Mike AC5P __ 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] K2
How do I get my credit card info to Elecraft, tnx 73 Bruce ve5rc __ 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] Ever had a WOW moment?
Yes, I remember WOW back in the 1958 season. I was running a Heathkit Lunchbox on 6 meters and worked everything I could hear. NOW in this century I am doing the same with my KX3. What a kick in the A##. Happy New Year everyone. Mel, K6KBE On Thursday, December 26, 2013 2:32 PM, Joe W2KJ w...@bellsouth.net wrote: Howdy Gang: As the subject says, have you ever had a WOW moment using QRP on the bands?? I just did as I answered a very weak response to my CQ on 21.060 at 1613Z. G3YPZ called and I couldn't really couldn't copy much until I got him zero beat and turned on the APF in my KX3. Finally got his call and then copied just about 100% of his transmissions from then on. Turns out that John was running a K3 at 100mw!! Of course the fact that he had a 2 element quad certainly helped but I can't recall ever working a DX station when he was running so little power. Solar Flux today is only at 123 so condx not great but 15m can be magical at times. This QRP stuff is amazing...we can be thankful to Wayne and Eric for such superb equipment that allow us to work farther with less these days. I harken back to my beginning days as a Novice with a homebrew 6V6 and S77 Hallicrafters receiver...amazing that I made any QSOs back then in 1962!! 73, Joe W2KJ I QRP, therefore I am __ 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] K2
Bruce, The direct path is to go to http://www.elecraft.com/newcc.html a secure page will open. The longer path through the Elecraft webpage is to click on Order and scroll down until you see the line If you only need to send us new Credit Card Information, or order parts not shown on our spare parts page, Click Here. You can also call the office at 831/763-4211 and give your information over the phone if that feels more secure to you. 73, Don W3FPR On 12/26/2013 6:21 PM, Bruce Rattray wrote: How do I get my credit card info to Elecraft, tnx 73 Bruce ve5rc __ 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] Noise Cancelling Headphones
With my Bose QC2 phones, I've never noticed any diminution in the quality of the desired signal. Full disclosure: I'm a CW guy. I have no idea how they perform on SSB. 73, Steve AA4AK On 12/26/2013 8:30 AM, Charlie T, K3ICH wrote: I've never tried noise cancelling headphones, so my one question is, does anyone detect ANY effect to the desired audio? In other words, any Noise-Blanker effects or coloration of the audio? I would suppose that, since they're designed for music, the noise cancelling function is transparent, right? On the very few flights I've taken recently, I successfully used my old Sony MDR-7506's. Maybe I don't know what I'm missing by NOT using a noise cancelling set. 73, Charlie k3ICH - Original Message - From: Ron D'Eau Claire r...@cobi.biz To: elecraft@mailman.qth.net Sent: Thursday, December 26, 2013 2:25 AM Subject: Re: [Elecraft] Noise Cancelling Headphones True noise cancelling headphones will cut noise far, far beyond anything acoustic isolation from ear pads can accomplish. I have a pair of Audio-Technia QuierPoint ATH-ANC1. They are on ear types so I didn't recommend them to the person asking for ones that cover the ears. They are very comfortable for me. When I fly, as the roar and whine of the big jet engines invades the cabin, I just switch them on and all the racket becomes a quite background purr. I often wear them for the entire 11 hours from the west coast of the USA to Europe, even if I'm not listening to any programs. The active circuitry in true noise-cancelling phones inverts the sound arriving and so actually cancels it out. The circuit takes a few seconds to adapt so when the attendant brings my drink she has no trouble waking me. 73 Ron AC7AC __ 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] Noise Cancelling Headphones
I appreciate all the replies. I learned a couple of things: 1. Noise-cancelling technology is not cheap, and 2. It's probably best that I actually audition (I think that's what someone called it) the headphones. I really do not need anything that will accept a mic. I am about 90% CW, 7% data, and 3% voice. For the little that I am on voice, I have the MH2 mic. Most folks that responded recommended the Bose Quiet Comfort 15's. In reference to number 1 above, I really had no idea noise-cancelling headphones would be so expensive, but you get what you pay for. A review site I found was www.head-fi.org. The Bose QC15 were rated #3 and followed the Sennheiser HD 380 Pro (#1 and not sure if they're noise cancelling or sound blocking) and the PSB M4U 2 (#2). However, like eHam.net, it's all subjective - folks either like the headphones or don't and there's no analytical data to back up their findings. 73, Joel - W4JBB On 12/25/13, 4:16 PM, Joel Black wrote: I am looking for a pair of noise cancelling headphones. I have a pair of Sony MDR-V6's that I love, but they do not have noise cancelling capability and my wife's embroidery machine is severely limiting my radio operations. I have already looked at the Yamaha CM500's because they come so highly recommended on this group. If they're noise cancelling, I cannot find that information about them. I want something that will last. The MDR-V6's have lasted at least 10 years if not longer. I've only had to replace the earpads. I want something that *covers* my ear *not* something that sits *on* my ear. Those that sit *on* my ears are uncomfortable after a very short while. Merry Christmas and 73, Joel - W4JBB __ 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] Noise Cancelling Headphones
The Audio Technic QuietPoint phones I mentioned before are still under $80 on Amazon. But they are on-ear types that I chose for small size when folded up to fit in my briefcase. Besides, being noise cancelling, isolating my ears from ambient sounds is not very important and I don't find them uncomfortable on long flights. They, along with many other Audio-Technica noise cancelling headphones that do cover your ears are available on Amazon. Here's a tinyurl link: http://tinyurl.com/mbbafjs The ones I have are at the top. Do they work as well as the high-priced phones? I have no idea. I don't have a store nearby where I can try them side-by-side. Besides, the high-priced units like Bose would have to come with free Champagne before I'd consider spending that much money on phones considering how well the cheaper ones work. Note that they do not suppress speech (or a crying baby). They work very, very well on steady noise (like fans or jet engines). You switch them on and a few seconds later the racket suddenly fades into the distant background. 73 Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Joel Black Sent: Thursday, December 26, 2013 3:43 PM To: elecraft Subject: Re: [Elecraft] Noise Cancelling Headphones I appreciate all the replies. I learned a couple of things: 1. Noise-cancelling technology is not cheap, and 2. It's probably best that I actually audition (I think that's what someone called it) the headphones. I really do not need anything that will accept a mic. I am about 90% CW, 7% data, and 3% voice. For the little that I am on voice, I have the MH2 mic. Most folks that responded recommended the Bose Quiet Comfort 15's. In reference to number 1 above, I really had no idea noise-cancelling headphones would be so expensive, but you get what you pay for. A review site I found was www.head-fi.org. The Bose QC15 were rated #3 and followed the Sennheiser HD 380 Pro (#1 and not sure if they're noise cancelling or sound blocking) and the PSB M4U 2 (#2). However, like eHam.net, it's all subjective - folks either like the headphones or don't and there's no analytical data to back up their findings. 73, Joel - W4JBB __ 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] Noise Cancelling Headphones
Worth the money is personal taste perhaps. I tried several noise cancelling headsets from the common passive variety with excellent sound-proofing to several with the electronic noise removal. Without a doubt the most comfortable and most effective headsets I compared were the Bose QC-2. That headphone had issues and was out of warranty. However, Bose will replace a failed headset out of warranty with the same or the next generation of headset for $100. I spotted for the new generation and these are lighter and at least as effective as the older Bose QC2. It's still worth my time to check out new ones in the off-chance something will beat the QC-15 but to date audio quality and ambient sound removal-wise, this is it. Gary KA1J On Thu, Dec 26, 2013 at 10:21 AM, Phil Kane k2...@kanafi.org wrote: On 12/26/2013 8:17 AM, iain macdonnell - N6ML wrote: These have caught my eye at my local Costco recently: http://www.costco.com/Sony-MDR-10RDC-Premium-Noise-Canceling-Headpho nes.product.100083695.html but I keep reminding myself that I have too many headsets already :) Is it worth 180 bucks? Maybe, if you operate in a noisy environment. The Bose QC15 that others are raving about sells for ~$270 ! 73, ~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 --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.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] Wtb Kpa100 toroids
Anyone have a bag of prewound toroids for kpa100 or there original kpa100 toroids and wirebag? Looking to buy a set. WT5Y Sent from my Cricket smartphone __ 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] Noise Cancelling Headphones
I know that here in Wisconsin, Bose has an outlet store in a nearby mall. I assume you could try on a pair although I have not done so. On 12/26/2013 5:43 PM, Joel Black wrote: I appreciate all the replies. I learned a couple of things: 1. Noise-cancelling technology is not cheap, and 2. It's probably best that I actually audition (I think that's what someone called it) the headphones. I really do not need anything that will accept a mic. I am about 90% CW, 7% data, and 3% voice. For the little that I am on voice, I have the MH2 mic. Most folks that responded recommended the Bose Quiet Comfort 15's. In reference to number 1 above, I really had no idea noise-cancelling headphones would be so expensive, but you get what you pay for. A review site I found was www.head-fi.org. The Bose QC15 were rated #3 and followed the Sennheiser HD 380 Pro (#1 and not sure if they're noise cancelling or sound blocking) and the PSB M4U 2 (#2). However, like eHam.net, it's all subjective - folks either like the headphones or don't and there's no analytical data to back up their findings. 73, Joel - W4JBB On 12/25/13, 4:16 PM, Joel Black wrote: I am looking for a pair of noise cancelling headphones. I have a pair of Sony MDR-V6's that I love, but they do not have noise cancelling capability and my wife's embroidery machine is severely limiting my radio operations. I have already looked at the Yamaha CM500's because they come so highly recommended on this group. If they're noise cancelling, I cannot find that information about them. I want something that will last. The MDR-V6's have lasted at least 10 years if not longer. I've only had to replace the earpads. I want something that *covers* my ear *not* something that sits *on* my ear. Those that sit *on* my ears are uncomfortable after a very short while. Merry Christmas and 73, Joel - W4JBB __ 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 -- 73, Gary K9GS Greater Milwaukee DX Association: http://www.gmdxa.org Society of Midwest Contesters: http://www.w9smc.com CW Ops #1032 http://www.cwops.org __ 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] Wtb Kpa100 toroids
You can get them from the 'Mychael Morohovich AA3WF (toroid...@earthlink.net) who is an approved toroid supplier by Elecraft. 73, Ron AC7AC -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of John Cooper Sent: Thursday, December 26, 2013 6:19 PM To: elecraft@mailman.qth.net Subject: [Elecraft] Wtb Kpa100 toroids Anyone have a bag of prewound toroids for kpa100 or there original kpa100 toroids and wirebag? Looking to buy a set. WT5Y Sent from my Cricket smartphone __ 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] Wtb Kpa100 toroids
John, Try The Toroid Guy - Mychael AA3WF - toroid...@earthlink.net. The KPA100 toroid set is $45.00 plus $8 shipping - he takes PayPal. 73, Don W3FPR On 12/26/2013 9:19 PM, John Cooper wrote: Anyone have a bag of prewound toroids for kpa100 or there original kpa100 toroids and wirebag? Looking to buy a set. WT5Y __ 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] K2
http://www.elecraft.com/newcc.html 73, John N1JM - 73, John N1JM K3 #5986 P3 #1752 KPA500 #596 KX3 #926 XG3 XG1 sent from my MacBook Pro -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-tp7582104p7582113.html Sent from the Elecraft 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
[Elecraft] Anyone using, or want to use, solar power with their KX3? Micro M+ Controller
A few years ago I got a Micro M+ charge controller for running my trail rigs off solar power. I combined it with some panel strips from Powerfilm and it has been a really great combo. With my KX3 and a 7Ah battery I can run indefinitely on backpacking and camping trips - for as much as I've used the rig in camp. The kits haven't been available for a while and I've been wanting to get a few more of these. So I took the schematic and parts from the QST article about it and pieced it together - with perf board and an enclosure (just no board mounting stuff, I'll have to figure it out later). Note that by changing one of the resistors you can change the output from charging 12v batteries to 9.6v = the same voltage of the internal AA's, if you so choose to use those in your KX3. with two sets you could run one set and charge the other. My parts list, and a bit more detail, can be viewed in my QRZ post. http://forums.qrz.com/showthread.php?418308-Micro-M-Solar-Charge-Controller-Parts-List-for-Rolling-Your-Own I hope this helps. Steve, KC8QVO -- View this message in context: http://elecraft.365791.n2.nabble.com/Anyone-using-or-want-to-use-solar-power-with-their-KX3-Micro-M-Controller-tp7582114.html Sent from the Elecraft 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] Noise Cancelling Headphones
Several years ago I ordered StennHeiser on-ear noise-cancelling headphones for reducing noise on aircraft. This was not a luxury purchase but following orders of my audiologist to protect my hearing always when flying. Previously, I had to remove hearing aids and insert foam ear-plugs, which meant I was totally deaf for any in-flight conversation. The StennHeiser's cost me about $150, and did reduce noise slightly, but were very uncomfortable to wear with hearaids. Removing hearing aids and I was back in my silent incommunicado world. So I bought the $300 Bose QC2 (QC15 were not made back then) with comfortable around-ear muff. This proved to be a good investment later when I upgraded to Phonac OTR hearing aids which would absolutely be incompatible with on the ear styles. I gave my StennHeiser to my then-new wife who only used them a couple times. I have not tried them in the noisy shack when I run the 8877 blower (because I am running eme digital modes which are a text mode). Soon I will be trying to run CW eme and the Bose may help a lot to minimize blower noise so I can copy extreme weak signals. BTW I have a pair of Sony MDR-V600 stereo headphones that have done good service for copying weak signals for over a decade. They are over the ear muffs which I must use with my OTR hearing aids. Recently, I have been playing with the NR settings of the K3 to find a good compromise with quieting vs distortion of sounds (F1-2 works fairly well for me as any distorting of sound makes it harder to understand speech). For weak CW cranking down the bandwidth to 100-Hz is the best vs NR. Definition: weak CW -6 dB SNR...signal strengths about -170 dBm. 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] Yamaha CM500 replacement pads
Today I called Yamaha parts dept. to order pads for my CM500. I was told they don't supply any parts for that headset, but if the pads break down within warranty they will just replace the entire headset. My son in law does part time work for Yamaha, and verified that they work this way with almost everything. I checked other routes, but came up empty.Headphones.com had nothing close. The closest I could find were at Scan Sound.com: http://www.scansound.com/index.php/headset-cushions/leatherette-headset-cushions/teardrop-shaped-leatherette-cushions-for-wireless-headphones.html They are 80mm wide, so would probably rip while trying to stretch them over the 95mm diam. Yamaha.If anyone is successful with these or other similar type pads, please post it. It seems our choices are live with what we have, use disposable covers, or purchase a new CM500. It would be nice to know how those covers affect comfort and audio, since the ear normally is inside the outer pad, next to the transducer. 73, Jim W6YA __ 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
