Re: [Elecraft] Silly question about DVK3
Wow, Pat. Thanks for the great info on triggering the KDVR3 from WriteLog. I've used WriteLog since 2003 FD so it's hard to switch to a new logger. Now I don't have to. 73, Fred, AE6IC __ 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] Elecraft SSB net announcement
The weekly Elecraft SSB net will meet tomorrow (11/13/11) at 1800Z on 14.3035 MHz +/- QRM. I will be net control from western Oregon, and we'll try relays to pull in the stations that I can't hear. See you there. 73, Phil, NS7P __ 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 drive levels w/ KPA500
Dick, When the KPA500 is hooked up and in operate mode you can set each bands output. When the amp is in standby mode then you can set the output to a different level. This can be done per band if you set the PWR Set to per band instead of normal. The K3 should tell you that it sees the KPA500. Mike W0MU J6M CQ WW DX CW Contest 2011 J6/W0MU November 21 - December 1 2011 W0MU-1 CC Cluster w0mu.net On 11/12/2011 9:27 PM, Dick Frey wrote: > How do I teach my K3 to go back to 100W when the KPA500 is off? > Yes, the control cable is connected. > 73, Dick > __ > 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 drive levels w/ KPA500
How do I teach my K3 to go back to 100W when the KPA500 is off? Yes, the control cable is connected. 73, Dick __ 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] Raspy audio on ssb on one band
I bought the radio used earlier in the year. I believe that it is sn in late 2000 but it was to factory in 2010 for upgrades. I listened on same antenna with ic-765 and no issues. Are there and settings which are band dependent that could be causing the problem? Barney On Nov 12, 2011, at 9:28 PM, "w0mu [via Elecraft]" wrote: > The only distortion I have seen is with the NB on which he said he > checked. Is this an early version of the radio? Maybe this is a case > of oxidation on the connectors. Only hearing it one band makes this a > very interesting problem. > > Mike W0MU > > J6M CQ WW DX CW Contest 2011 > J6/W0MU November 21 - December 1 2011 > W0MU-1 CC Cluster w0mu.net > > > On 11/12/2011 7:25 PM, Don Wilhelm wrote: > > > Whoops, I did not catch that on the first reading. I concede and have > > no easy answers. Even so, the SSB demodulation in the K3 is not band > > dependent either, so a good look at your antenna system and > > consideration for the reception of interfering signals from consumer > > devices are prime candidates for investigation. > > > > 73, > > Don W3FPR > > > > On 11/12/2011 9:15 PM, cbscholl wrote: > >> Why would rf feedback be causing an issue on receive? > >> > >> Barney > >> > >> On Nov 12, 2011, at 8:46 PM, "Don Wilhelm-4 [via Elecraft]"<[hidden > >> email]> wrote: > >> > >>> Barney, > >>> > >>> The most common cause for problems of that nature is RF feedback in the > >>> shack. If you have another receiver, listen to the transmitted audio > >>> while the K3 is connected to a dummy load. If there are no problems > >>> with that configuration, take a serious look at your antenna system for > >>> that troublesome band. > >>> > >>> There is nothing in the K3 modulation scheme that is band dependent - in > >>> other words, if it works OK on one band, it should work well on all > >>> bands unless something external to the K3 is causing a problem. > >>> > >>> 73, > >>> Don W3FPR > >>> > >>> On 11/12/2011 7:34 PM, cbscholl wrote: > I believe that I am hearing raspy or slightly distorted audio on receive > on > my K3. It has current mods. I have noticed the problem only on 15 > meters. > The other band seem fine. Does anyone have any ideas or suggestions? > Barney > > >>> __ > >>> Elecraft mailing list > >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft > >>> Help: http://mailman.qth.net/mmfaq.htm > >>> Post: mailto:[hidden email] > >>> > >>> This list hosted by: http://www.qsl.net > >>> Please help support this email list: http://www.qsl.net/donate.html > >>> > >>> > >>> If you reply to this email, your message will be added to the discussion > >>> below: > >>> http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989005.html > >>> To unsubscribe from Raspy audio on ssb on one band, click here. > >>> See how NAML generates this email > >> -- > >> View this message in context: > >> http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989022.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:[hidden email] > >> > >> 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:[hidden email] > > > > 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:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > If you reply to this email, your message will be added to the discussion > below: > http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989030.html > To unsubscribe from Raspy audio on ssb on one band, click here. > See how NAML generates this email -- View this message in context: http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989060.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
[Elecraft] WB4WTN - please contact me.
To all - sorry for the bandwidth --- Bill, I am having trouble with your "Spam" filtering at Earthlink. Please clear your blocks on d...@w3fpr.com, w3fpr.embarqmail.com and w3fpr@arrl,net and respond to me so I can answer your questions. i have tried the "filling in the blanks" for the automated responses and was rejected because the original message had disappeared. FWIW, the blocking provided by Earthlink is a PITA. There are much better spam blockers available hat do not require the responder to "jump through hoops" to send a response to a question you have posed. If you insist on using this kind of "spam blocker" please be considerate enough to open response paths for any persons that you send a request to. I cannot get a response to you because Earthlink is blocking it. 73, Don W3FPR __ 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] Raspy audio on ssb on one band
The only distortion I have seen is with the NB on which he said he checked. Is this an early version of the radio? Maybe this is a case of oxidation on the connectors. Only hearing it one band makes this a very interesting problem. Mike W0MU J6M CQ WW DX CW Contest 2011 J6/W0MU November 21 - December 1 2011 W0MU-1 CC Cluster w0mu.net On 11/12/2011 7:25 PM, Don Wilhelm wrote: > Whoops, I did not catch that on the first reading. I concede and have > no easy answers. Even so, the SSB demodulation in the K3 is not band > dependent either, so a good look at your antenna system and > consideration for the reception of interfering signals from consumer > devices are prime candidates for investigation. > > 73, > Don W3FPR > > On 11/12/2011 9:15 PM, cbscholl wrote: >> Why would rf feedback be causing an issue on receive? >> >> Barney >> >> On Nov 12, 2011, at 8:46 PM, "Don Wilhelm-4 [via >> Elecraft]" wrote: >> >>> Barney, >>> >>> The most common cause for problems of that nature is RF feedback in the >>> shack. If you have another receiver, listen to the transmitted audio >>> while the K3 is connected to a dummy load. If there are no problems >>> with that configuration, take a serious look at your antenna system for >>> that troublesome band. >>> >>> There is nothing in the K3 modulation scheme that is band dependent - in >>> other words, if it works OK on one band, it should work well on all >>> bands unless something external to the K3 is causing a problem. >>> >>> 73, >>> Don W3FPR >>> >>> On 11/12/2011 7:34 PM, cbscholl wrote: I believe that I am hearing raspy or slightly distorted audio on receive on my K3. It has current mods. I have noticed the problem only on 15 meters. The other band seem fine. Does anyone have any ideas or suggestions? Barney >>> __ >>> Elecraft mailing list >>> Home: http://mailman.qth.net/mailman/listinfo/elecraft >>> Help: http://mailman.qth.net/mmfaq.htm >>> Post: mailto:[hidden email] >>> >>> This list hosted by: http://www.qsl.net >>> Please help support this email list: http://www.qsl.net/donate.html >>> >>> >>> If you reply to this email, your message will be added to the discussion >>> below: >>> http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989005.html >>> To unsubscribe from Raspy audio on ssb on one band, click here. >>> See how NAML generates this email >> -- >> View this message in context: >> http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989022.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 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] Raspy audio on ssb on one band
Whoops, I did not catch that on the first reading. I concede and have no easy answers. Even so, the SSB demodulation in the K3 is not band dependent either, so a good look at your antenna system and consideration for the reception of interfering signals from consumer devices are prime candidates for investigation. 73, Don W3FPR On 11/12/2011 9:15 PM, cbscholl wrote: > Why would rf feedback be causing an issue on receive? > > Barney > > On Nov 12, 2011, at 8:46 PM, "Don Wilhelm-4 [via > Elecraft]" wrote: > >> Barney, >> >> The most common cause for problems of that nature is RF feedback in the >> shack. If you have another receiver, listen to the transmitted audio >> while the K3 is connected to a dummy load. If there are no problems >> with that configuration, take a serious look at your antenna system for >> that troublesome band. >> >> There is nothing in the K3 modulation scheme that is band dependent - in >> other words, if it works OK on one band, it should work well on all >> bands unless something external to the K3 is causing a problem. >> >> 73, >> Don W3FPR >> >> On 11/12/2011 7:34 PM, cbscholl wrote: >>> I believe that I am hearing raspy or slightly distorted audio on receive on >>> my K3. It has current mods. I have noticed the problem only on 15 meters. >>> The other band seem fine. Does anyone have any ideas or suggestions? Barney >>> >> __ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[hidden email] >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> >> >> If you reply to this email, your message will be added to the discussion >> below: >> http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989005.html >> To unsubscribe from Raspy audio on ssb on one band, click here. >> See how NAML generates this email > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989022.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
Re: [Elecraft] Raspy audio on ssb on one band
Why would rf feedback be causing an issue on receive? Barney On Nov 12, 2011, at 8:46 PM, "Don Wilhelm-4 [via Elecraft]" wrote: > Barney, > > The most common cause for problems of that nature is RF feedback in the > shack. If you have another receiver, listen to the transmitted audio > while the K3 is connected to a dummy load. If there are no problems > with that configuration, take a serious look at your antenna system for > that troublesome band. > > There is nothing in the K3 modulation scheme that is band dependent - in > other words, if it works OK on one band, it should work well on all > bands unless something external to the K3 is causing a problem. > > 73, > Don W3FPR > > On 11/12/2011 7:34 PM, cbscholl wrote: > > I believe that I am hearing raspy or slightly distorted audio on receive on > > my K3. It has current mods. I have noticed the problem only on 15 meters. > > The other band seem fine. Does anyone have any ideas or suggestions? Barney > > > __ > Elecraft mailing list > Home: http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/mmfaq.htm > Post: mailto:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > If you reply to this email, your message will be added to the discussion > below: > http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989005.html > To unsubscribe from Raspy audio on ssb on one band, click here. > See how NAML generates this email -- View this message in context: http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6989022.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] K2 - Time on K2 Finals
John and all, Sorry for the previous blank email - slip of the mouse!. There are several possible explanations for repeated K2 PA transistor failure - the most common of which is that the PA bias is not correct. The K2PAKIT comes with 2NA transistors that are to be replacements for Q11 and Q13. If one or both of those transistors are damaged, the bias to the PA transistors will not be correct and the result is their early demise. Q11 and Q13 often fail as a secondary fault when the PA transistors fail. There was also a short "glitch" in the PA transistors being used by Elecraft. The original PA transistors did not need to be matched because they came in consistently with an HFE in the 50 to 60 range. Then the original supplier of the PA transistors no longer produced these good transistors, and it was discovered that the HFE of the transistors being supplied varied substantially. If one were unfortunate enough to be supplied with transistors having substantially different HFE, one would hog the current and eventually fail. Once that condition was discovered, Elecraft began supplying matched pair transistors for the K2 PA. No problems have been observed since the transistors have been matched. Perhaps your friend was trapped in that interim period between the mismatched transistors and the time when Elecraft began matching them (or he had a Q11/Q13 problem) - without more details about the time frame this occurred, it is difficult to make any assessment - what I can say is that this condition has been corrected. 73, Don W3FPR On 11/12/2011 6:39 PM, John wrote: > Thanks to all for the answers. A friend of mine had a K2 (QRP) that > kept blowing finals no matter what he tried so I was curious if there > was some known stress point in the design. He has since moved to a K3 > and no longer has the K2 so a resolution to the blowing finals is not known. > __ 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 - Time on K2 Finals
On 11/12/2011 6:39 PM, John wrote: > Thanks to all for the answers. A friend of mine had a K2 (QRP) that > kept blowing finals no matter what he tried so I was curious if there > was some known stress point in the design. He has since moved to a K3 > and no longer has the K2 so a resolution to the blowing finals is not known. > > Thanks again. > John, kx4o > > __ 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] Raspy audio on ssb on one band
Barney, The most common cause for problems of that nature is RF feedback in the shack. If you have another receiver, listen to the transmitted audio while the K3 is connected to a dummy load. If there are no problems with that configuration, take a serious look at your antenna system for that troublesome band. There is nothing in the K3 modulation scheme that is band dependent - in other words, if it works OK on one band, it should work well on all bands unless something external to the K3 is causing a problem. 73, Don W3FPR On 11/12/2011 7:34 PM, cbscholl wrote: > I believe that I am hearing raspy or slightly distorted audio on receive on > my K3. It has current mods. I have noticed the problem only on 15 meters. > The other band seem fine. Does anyone have any ideas or suggestions? Barney > __ 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] Elecraft CW Net Announcement
Good Evening, The weather switched to foggy and cold and wet yesterday. It has not ceased raining since then. Luckily the very last thing I did before driven inside was to cover the brand new wood pile with plastic. The grasshopper has finally gotten his winter heat supply ready. Now to a winter at the bench enjoying all the work I have put in. Propagation has been beyond good. Milliwatts on ten meters are crossing the oceans. Twenty meters is supporting low power work too. Now to sit down at the rig and work a string of local folks on 80 m. That is always fun. Trouble is it is so hard to take a break Please join us tomorrow afternoon and evening. 1) Hail signs (first letter or two of the suffix of your call) 2) NCS help (as well as QSP/QNP help) Sunday 2300z (Sunday 3 PM PST) 14050 kHz Monday 0100z (Sunday 5 PM PST) 7045 kHz Stay well, 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
[Elecraft] Test
test __ 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] KIO2 and KAT2
For sale KIO2 and KAT2 with lid and speaker. Works great. $225. Will take paypal. Off list markf1...@hotmail.com T-Mobile. America's First Nationwide 4G Network. __ 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] Raspy audio on ssb on one band
That was the first thing I looked at. Barney On Nov 12, 2011, at 7:39 PM, "w0mu [via Elecraft]" wrote: > Is the noise blanker on? > > Mike W0MU > > J6M CQ WW DX CW Contest 2011 > J6/W0MU November 21 - December 1 2011 > W0MU-1 CC Cluster w0mu.net > > > On 11/12/2011 5:34 PM, cbscholl wrote: > > > I believe that I am hearing raspy or slightly distorted audio on receive on > > my K3. It has current mods. I have noticed the problem only on 15 meters. > > The other band seem fine. Does anyone have any ideas or suggestions? Barney > > > > -- > > View this message in context: > > http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6988925.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:[hidden email] > > > > 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:[hidden email] > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > > > If you reply to this email, your message will be added to the discussion > below: > http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6988937.html > To unsubscribe from Raspy audio on ssb on one band, click here. > See how NAML generates this email -- View this message in context: http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6988952.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] Raspy audio on ssb on one band
Is the noise blanker on? Mike W0MU J6M CQ WW DX CW Contest 2011 J6/W0MU November 21 - December 1 2011 W0MU-1 CC Cluster w0mu.net On 11/12/2011 5:34 PM, cbscholl wrote: > I believe that I am hearing raspy or slightly distorted audio on receive on > my K3. It has current mods. I have noticed the problem only on 15 meters. > The other band seem fine. Does anyone have any ideas or suggestions? Barney > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6988925.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] Raspy audio on ssb on one band
I believe that I am hearing raspy or slightly distorted audio on receive on my K3. It has current mods. I have noticed the problem only on 15 meters. The other band seem fine. Does anyone have any ideas or suggestions? Barney -- View this message in context: http://elecraft.365791.n2.nabble.com/Raspy-audio-on-ssb-on-one-band-tp6988925p6988925.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] K2 - Time on K2 Finals
I'd take a real close hard look at the antenna, from the radio out... including minute inspection of the connections in the shack that were use by the K2. It may have been an intermittent connector that after being moved, is not in a stressed or disadvantageous situation. --... ...-- Dale - WC7S in Wy __ 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 Filter question - SSB
Down at WP2Z for CQWW SSB Test we sometimes on 20M opened up the bandwidth to 2.4KHZ. Even with strong adjacent signals (as always the case on 20M) we could keep our run rate higher than with narrower bandwidth. It was just easier to copy calls even with all that adjacent QRM. 73, N2TK, Tony -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Bill W4ZV Sent: Thursday, November 10, 2011 2:21 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K3 Filter question - SSB Barry N1EU wrote: > > > Bill W4ZV wrote: >> >> 1. It *WILL* keep your AGC from pumping if there's another strong >> station within the 1.8 kHz passband. However, do you really think you >> could copy a weak signal while a S9+30 interfering signal is inside >> your 1.8k bandwidth? I don't think so. With any typical SSB filter >> bandwidth, AGC pumping is not a practical issue (it IS a big deal for >> CW however). >> > > Bill, I'm confused by that first sentence. How can a signal within > the passband NOT pump the AGC? > > Normally when AGC pumping is discussed, it's a negative reference to > an adjacent signal that's outside of the passband. > > Barry N1EU > You're correct Barry. I meant to say just outside your passband. However, given that most SSB signals generate 3rd garbage (spurs, phase noise, etc) in the area of -35 dBc, an S9+30 signal just outside your 1.8k passband will easily obliterate a weak signal inside the passband. I found my ears to be the best tool for copying weak signals in the presence of strong adjacent splatter. For whatever reason they heard better using the stock 5-pole 2.7k set to a DSP BW of 2.0-2.1k than the 8-pole 1.8k set to actuate at DSP = 1.9k. I tried many times to use the 1.8k but simply just found the 2.7k worked better for me. Of course that's just my experience which wouldn't necessarily apply to everyone. 73, Bill -- View this message in context: http://elecraft.365791.n2.nabble.com/K3-Filter-question-SSB-tp6981339p698291 2.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
Re: [Elecraft] K2 - Time on K2 Finals
Thanks to all for the answers. A friend of mine had a K2 (QRP) that kept blowing finals no matter what he tried so I was curious if there was some known stress point in the design. He has since moved to a K3 and no longer has the K2 so a resolution to the blowing finals is not known. Thanks again. John, kx4o On 11/12/11 5:04 PM, Kurt Cramer wrote: > The less then two hours refers to the running time before you tighten the > mounting screws. They become loose and need to be tightened once after > installation. > Kurt W7QHD > > __ 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] Hum on 15 Meters CW
Don, What's odd is that when I cam back into the shack after reading your email and turning the K3 back on, no hum!!! I turned the K3 on and off before reporting the issue but the hum was still there. Now it is gone - for now anyway. Well, I'll see if it returns. Thanks. -- View this message in context: http://elecraft.365791.n2.nabble.com/Hum-on-15-Meters-CW-tp6988831p6988860.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] K2 sold
K2-100 #4991 has been sold. Thanks for all the interest! 73, Cary, K4TM Sent from my iPhone in Lynchburg VA - named a Runner Friendly City by Road Runner's Club of America in 2011. __ 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] Hum on 15 Meters CW
Mitch, Are you certain it is coming from the K3? I have conditions like that on some bands at my workbench where I have amplifier computer speakers. Since it is not constant, and I don't operate from there, I ignore it, but I would chase it down and kill it if it were at the operating position. 73, Don W3FPR On 11/12/2011 6:04 PM, WD0ECO wrote: > I'm hearing a vibrating humming noise from my K3 when keying CW on 15 meters. > > It is only on 15 meters and only with my beam antenna - not heard on the > dipole or vertical. > > SWR is 1.6 with K3 tuner bypassed (LP-100A meter) and 1.1 with tuner on and > according to K3 meter. Tried different keys - still hum. > > The hum is not heard under 50 watts but gets progressively louder from 50 to > 100 watts. > > I don't notice the hum on 15 meters SSB via mic. > > This just started happening. Any ideas? It doesn't appear to affect output > or have high SWR. Is it hurting anything??? > > 73, Mitch > __ 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] Hum on 15 Meters CW
I'm hearing a vibrating humming noise from my K3 when keying CW on 15 meters. It is only on 15 meters and only with my beam antenna - not heard on the dipole or vertical. SWR is 1.6 with K3 tuner bypassed (LP-100A meter) and 1.1 with tuner on and according to K3 meter. Tried different keys - still hum. The hum is not heard under 50 watts but gets progressively louder from 50 to 100 watts. I don't notice the hum on 15 meters SSB via mic. This just started happening. Any ideas? It doesn't appear to affect output or have high SWR. Is it hurting anything??? 73, Mitch -- View this message in context: http://elecraft.365791.n2.nabble.com/Hum-on-15-Meters-CW-tp6988831p6988831.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] K3 TX Gain Calibration Failure-Resolution
I replaced the LPA board and my K3 now passes the Low and High Power TX Gain Calibration tests. We believe that there was a failure of one of the drivers which required much more gain to get the desired 5 watts out of the board. If your K3 has the transverter board and it passes the 1mw test then everything before the LPA board "should" be functioning properly. There is only a couple of parts between the transverter stage and the LPA. The radio was putting out 50 watts so we believed that the 100 watt unit was also working fine. As always the support from Elecraft was excellent. Gary and Rene were great and Rene tested the new LPA board in a K3 prior to shipping and made sure it got out the door. This is my main K3 that is heading to J6. Gary felt that we would be taking a big risk taking the rig with it failing the TX Gain tests. If that board had failed completely the radio would have been useless. Thanks again to all the Elecraft gang! -- Mike W0MU J6M CQ WW DX CW Contest 2011 J6/W0MU November 21 - December 1 2011 W0MU-1 CC Cluster w0mu.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
[Elecraft] K1 for Sale
4 Band (40,30,20 and 15) meter K1 with antenna tuner. Upgraded Firmware Rev 109. A really neat build - if I do say so myself. This a truly fantastic radio that will amaze you with its sensitivity and great filtering. The built-in antenna tuner will tune a wet noodle making it perfect for portable operation. I took it traveling and made 100s of QSOs all over the world with minimal antennas and a walwart power supply. Excellent condition non-smoking. One tiny mark on the top. Lots of QRP radios are just toys. The K1 is a serious rig with an excellent receiver. Experience Elecraft mojo at its best for only $475 plus $10 shipping in US. Includes walwart power supply and BNC to SO239 adapter. Please reply off list. Thanks for looking. -- Buck k4ia K3 # 101 __ 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 - Time on K2 Finals
The less then two hours refers to the running time before you tighten the mounting screws. They become loose and need to be tightened once after installation. Kurt W7QHD > From: r...@cobi.biz > To: elecraft@mailman.qth.net > Date: Sat, 12 Nov 2011 11:24:59 -0800 > Subject: Re: [Elecraft] K2 - Time on K2 Finals > > Another 'old school' carryover was to purchase a replacement for a rig's > final(s) since Murphy decreed they'd fail at the most inconvenient time. So > I ordered spares for my K2 when I built it in 2000. > > In spite of all the normal operating gaffs - transmitting briefly into an > open load with infinite SWR too many times, hammering away at the key for > way too long in a rag chew, etc., the K2 still works like new and the > replacement "finals" are still in my operating desk drawer somewhere... > > Ron AC7AC > > > > -Original Message- > > John, > > I don't know of any lifetime issues with the K2 finals or any other > transmitter with a solid state PA. That was an important consideration > with tubes, so maybe it was just an "old school" statement. > > The K2 PA transistors are quite hardy, but if one abuses them > sufficiently (for instance transmitting into a high SWR at high power), > they will turn "belly up" in short order. > > 73, > Don W3FPR > > On 11/12/2011 8:59 AM, John wrote: > > On 11/11/11 10:24 AM, Hunsdon Cary III wrote: > >> rig has less than two hours on the finals; > > Just wondering why "less than two hours on the finals" is important. Do > > K2 finals have a lifetime issue? > > > > > > __ > 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] P3B
Has there been any discussion of a possible P3B (black box), that would be the same as the P3 with out the screen, just plug a PC monitor into the black box? Also what is the status of the monitor connection to the P3? Thinking about a K3 and P3 for one of my positions. I have the KPA500 and love it. Joe N9VX __ 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] (OT) EFHW Vertical Antenna
The only important point about resonance is that the *system*, including any matching networks, is resonant (i.e. presents a purely resistive, non-reactive load to the transmitter) for optimum power transfer to the antenna. With modern transmitters, we usually want the resistive impedance to be 50 ohms since that's what they are designed to handle. Also, if any significant length of 50 ohm coaxial cable is used to connect the system to the transmitter, keeping the impedance at 50 ohms minimizes the transmission line losses too. That's why using a built in tuner in a rig to correct for anything but small mismatches usually is not a good practice. However, even with a matching network, antenna feed point impedance can have a huge effect on the antenna system efficiency when using an end-fed antenna - vertical, 'long wire' or whatever. That's because the current at the feed point is shared between the radiator and the "ground" system - counterpoise, radials, or whatever. Any impedance in the ground system will consume RF power that would otherwise be radiated by the antenna. Half wave end fed antennas are extremely efficient because they present a very high impedance at the feed point, meaning very low RF currents flow in either the antenna or ground system. Such an antenna can be more than 90% efficient even if the ground system has an impedance of 300 ohms or so (a fairly punk, but common ground system impedance). But, as the radiator is made physically shorter (or the frequency lowered) the impedance at the feed point drops and the current goes up, meaning the ground system resistance consumes a larger and larger share of the RF. It is common for a short whip antenna to have an efficiency of less than 10%, meaning that 90% of the RF is consumed as heat in the ground system. An electrically short (<1/2 wave) antenna that exhibits a broad bandwidth (low SWR over a large range of frequencies) almost certainly has lots of loss. A radiator always shows a change of reactance (SWR) with frequency. A resistive dummy load (like a punk ground or other resistance in the system) will be "flat" over a broad range. A useful experiment, if you have EZNEC or something similar, is to model your antenna and check the SWR bandwidth (or impedance at two frequencies straddling the resonant frequency) then compare that to your actual antenna. Any additional bandwidth is a sign of additional loss in the system. There is no "magic" way to raise the antenna's inherent impedance other than to make it physically larger. Loading coils, top hats, etc., may cause an antenna to become self resonant at a particular frequency, but the resistive part of the impedance that governs its efficiency with a given ground system remains as low as ever. Going the other way, though, the efficiency improves at frequencies where the current maxima occur as the antenna is longer than 1/2 wavelength. The impedance is never as low as it is at 1/4 wavelength or below. Indeed, as you go higher the lowest impedance goes up, and the highest impedance goes down (making the system easier to match). Now this doesn't say anything about radiation pattern, etc. Only about the efficiency of radiating RF. But even a full-size dipole doesn't show significant directivity unless it's at least 1/2 wavelength above the ground. A doublet avoids the problem of the ground system, but requires twice as much wire up in the air. It will work very well down to the point where the radiator is 1/4 wave long, as long as the low-loss (open wire) feeders are at least 1/4 wave long, making each side a full 1/2 wave. Of course having half of the antenna in the open wire feed line means that half of it does not radiate, but that only costs about 1 or 2 dB. That's the only consideration concerning the length of a doublet (my favorite antenna too). I believe by "Cebik" doublet you are referring to his favorite length of 42 feet. He recommended that as the longest antenna that will still have good low-angle lobes on 10 meters, not because it's more efficient at a radiator. If you make it longer the antenna will exhibit a very strong lobe at 90 degrees (straight up). 73, Ron AC7AC -Original Message- Hello Mike. My EFHW vertical is resonant only at 20 meters. The *antenna* SWR is lousy everywhere else according to my MJF259 which stops reporting at 25:1. -- just as bad as my non-resonant-by-design 44' Cebik doublet with which I've worked the world, at 5 watts and below. The internal tuners in my KX1, K1, and K2 all tune the antenna between 1:1 and 1:4. I've used this vertical with good results on 40 meters and *great* results on 30, 20, 17,12, and 10. __ 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:
[Elecraft] Fw: Re: (OT) EFHW Vertical Antenna
Guys I just got done installing a 40/20/15/10 meter vert as a ground plane,, mounted up at 15 Ft along side the top of my porch with 12 or so non tuned radials on the roof and WOW ,, flat on all the bands, with a SWR of under 1.2 to 1 and quite a DX antenna on 40 ran some coax up through the center if a Fiberglas pole to act as the 40 meter element and made PVC 8 inch stand offs mounted on the pole to hold the 20/10 meter element so what I got for 130 bux is a better antenna than the Mighty Fine Junk stuff that is flat on all the bands with full band coverage and as there are no traps works as a general SW rcv antenna always heard that above ground radials work better than on the ground and at this location it plays very well Bob K3DJC Hello Mike. My EFHW vertical is resonant only at 20 meters. The *antenna* SWR is lousy everywhere else according to my MJF259 which stops reporting at 25:1. 53 Year Old Mom Looks 33 The Stunning Results of Her Wrinkle Trick Has Botox Doctors Worried http://thirdpartyoffers.juno.com/TGL3141/4ebed9df46e5a78f94m03vuc __ 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] (OT) EFHW Vertical Antenna
Hello Mike. My EFHW vertical is resonant only at 20 meters. The *antenna* SWR is lousy everywhere else according to my MJF259 which stops reporting at 25:1. -- just as bad as my non-resonant-by-design 44' Cebik doublet with which I've worked the world, at 5 watts and below. The internal tuners in my KX1, K1, and K2 all tune the antenna between 1:1 and 1:4. I've used this vertical with good results on 40 meters and *great* results on 30, 20, 17,12, and 10. My use of *great* is within the following context: I have little test equipment and my background in electronics is truly 'amateur'; I'm still learning after 51 years and I never seem to be able to learn enough, fast enough ;).Hence the use of the word 'empirical' in the Youtube description to underscore the casual nature of this rather interesting comparison between W1ZMB's OCF up in the clear and my new antenna toy sitting on his deck. All I can say is that the darn thing produces great DX QSOs for me on my 5 watts or less and affords me a second antenna option in my antenna restrictive community. Sometimes, a signal is louder on my doublet than the vertical or vice versa: a quick flip of a switch and I can try the other antenna. It's nice to have that option. The 9:1 UNUN I used (purchased from the Emergency Radio Club of Honolulu) was my choice over a parallel tuned circuit because my goal was to end up with the easiest and fastest antenna to put up and take down and use. I don't have to stand next to the antenna and tune a capacitor this way. I realize my choice might not be technically optimum but once again, it reflects the goal I set for myself. I'm using 20 gauge teflon coated wire because the 33' MFJ pole tapers to an extremely thin final section - closer to an ultralight fishing pole. Anything larger than 20 gauge starts to bend the pole's tip over. In my own experience - and I once again admit my technical weakness in the subject area - I have experienced no difficulty with extremely thin wire at the QRP levels I operate at. In order to put less strain on the wire during frequent set up/takedown I chose to wind it around homemade clips as shown in the video which give me about an 18" diameter. The video shows how quickly it can be done with no tangle. The 22 gauge toroid wire is what the Honolulu folks who designed the UNUN used. It seems to be a frequently occuring wire size in other EFHW papers and construction articles I've read. Again, I'm sorry that I don't have the technical background to comment further. stan WB2LQF On Sat, Nov 12, 2011 at 1:14 PM, Mike Morrow wrote: >> http://www.youtube.com/watch?v=uWkpQ785Pjo > > That is an interesting demonstration, Stan. I have a couple of > questions. > > It is stated that the VSWR was no greater than 1.4:1 on 40 through 10 > meters. > But it appears to me that these figures report only the lowest VSWR > that the > K2's ***ATU*** could produce, NOT the actual VSWR that existed on the > antenna > side of the ATU. That seems at best be a measure of K2 ATU > performance. It > says nothing substantive about the characteristics of the attached > antenna. :-) > If that is correct, do you have any figures for the VSWR that the > antenna > with transmission line actually presents to the tuner? The impedance > plots > from a good antenna analyzer would be most interesting. > > Why use thin 20 awg wire along the mast as the radiator? In my 35 > years of experimenting with portable wire antennas, I found nothing > but trouble when > using such extremely small diameter wire. Instead, for more than 15 > years I've > used 14 awg Flexweave-tm which consists of 168 very fine strands of > copper. > It is a dream to use, and it never suffers fatigue failure. I've > never had a > portable wire antenna to fail since I started using Flexweave. It's > available > bare or insulated, and either will tolerate frequent spooling and > un-spooling > for the life of the antenna. > > I also question the use of 22 awg wire in the toroidal transformer. > Such small > conductors represent just as much RF loss at QRP as at 200 watts. > Much larger > conductors would be appropriate there as well. > > There is no advantage to small conductors in any HF antenna design, > especially > for QRP use. I also cringe at the RG-174 coax crowd. :-) > > 73, > Mike / KK5F __ 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] WWV DE K6GC
I would appreciate some input using URL's on updating. TR, K6GC __ 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 - Time on K2 Finals
Another 'old school' carryover was to purchase a replacement for a rig's final(s) since Murphy decreed they'd fail at the most inconvenient time. So I ordered spares for my K2 when I built it in 2000. In spite of all the normal operating gaffs - transmitting briefly into an open load with infinite SWR too many times, hammering away at the key for way too long in a rag chew, etc., the K2 still works like new and the replacement "finals" are still in my operating desk drawer somewhere... Ron AC7AC -Original Message- John, I don't know of any lifetime issues with the K2 finals or any other transmitter with a solid state PA. That was an important consideration with tubes, so maybe it was just an "old school" statement. The K2 PA transistors are quite hardy, but if one abuses them sufficiently (for instance transmitting into a high SWR at high power), they will turn "belly up" in short order. 73, Don W3FPR On 11/12/2011 8:59 AM, John wrote: > On 11/11/11 10:24 AM, Hunsdon Cary III wrote: >> rig has less than two hours on the finals; > Just wondering why "less than two hours on the finals" is important. Do > K2 finals have a lifetime issue? > > __ 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] Accessory Build order
There is a "trick" I use when removing the K2 heatsink. Stick a piece of electrical tape over each of the PA mounting screw heads - stick to the surrounding board and whatever else it sticks to. Now you can remove the nuts - push the screw threads back a bit to allow the heat sink to tilt up and be moved to the rear. If you are going to do a lot of work with the heat sink removed, put the nuts temporarily on the screws. You can move the K2 around without losing the PA mounting hardware. 73, Don W3FPR On 11/12/2011 1:21 PM, Mike K8CN wrote: > As you may know from reading this forum, hasty removal of the heat sink > cover will cause the PA transistor mounting hardware and shoulder washers to > fall out. I installed a K160RX module along with a KAT2 module while I had > the heat sink removed, but I postponed the installation of other already > built options for those snow days to come. Do be sure to carefully re-seat > the heat sink cover and check the PA transistors for short circuits as > directed in the K2 manual after re-assembly. > > __ 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] Accessory Build order
Fred, Having gone partially through this process recently, I would vouch for Don's recommendation that you do first what most adds to your desired operating capabilities. I would add only one small caveat though - the KAT2 installation requires removal of the heat sink portion of the bottom cover if you did not install its connector on the RF board when you built the K2, whereas the other options you listed do not require the heat sink removal. As you may know from reading this forum, hasty removal of the heat sink cover will cause the PA transistor mounting hardware and shoulder washers to fall out. I installed a K160RX module along with a KAT2 module while I had the heat sink removed, but I postponed the installation of other already built options for those snow days to come. Do be sure to carefully re-seat the heat sink cover and check the PA transistors for short circuits as directed in the K2 manual after re-assembly. 73, Mike K8CN -- View this message in context: http://elecraft.365791.n2.nabble.com/Accessory-Build-order-tp6987212p6988474.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] (no subject)
This spamming address is now set to moderate mode and its postings will be reviewed before posting to the list. Eric List Moderator www.elecraft.com _..._ On Nov 12, 2011, at 4:12 AM, John Shea wrote: > http://vigrxoil.tv > __ > 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] (OT) EFHW Vertical Antenna
Stan wrote: > I'd like to offer the following Youtube demonstration to such listers > who might be interested. > http://www.youtube.com/watch?v=uWkpQ785Pjo That is an interesting demonstration, Stan. I have a couple of questions. It is stated that the VSWR was no greater than 1.4:1 on 40 through 10 meters. But it appears to me that these figures report only the lowest VSWR that the K2's ***ATU*** could produce, NOT the actual VSWR that existed on the antenna side of the ATU. That seems at best be a measure of K2 ATU performance. It says nothing substantive about the characteristics of the attached antenna. :-) If that is correct, do you have any figures for the VSWR that the antenna with transmission line actually presents to the tuner? The impedance plots from a good antenna analyzer would be most interesting. Why use thin 20 awg wire along the mast as the radiator? In my 35 years of experimenting with portable wire antennas, I found nothing but trouble when using such extremely small diameter wire. Instead, for more than 15 years I've used 14 awg Flexweave-tm which consists of 168 very fine strands of copper. It is a dream to use, and it never suffers fatigue failure. I've never had a portable wire antenna to fail since I started using Flexweave. It's available bare or insulated, and either will tolerate frequent spooling and un-spooling for the life of the antenna. I also question the use of 22 awg wire in the toroidal transformer. Such small conductors represent just as much RF loss at QRP as at 200 watts. Much larger conductors would be appropriate there as well. There is no advantage to small conductors in any HF antenna design, especially for QRP use. I also cringe at the RG-174 coax crowd. :-) 73, Mike / KK5F __ 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] FS: ELECRAFT UNBUILT K2 and the KI02 AUX IO board - SOLD
The K2 and the KIO2 have been sold pending funds - thanks to all who responded. Dan - KI4YZE -Original Message- From: elecraft-boun...@mailman.qth.net [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Dan Boardman Sent: Saturday, November 12, 2011 10:03 AM To: elecraft@mailman.qth.net Subject: [Elecraft] FS: ELECRAFT UNBUILT K2 and the KI02 AUX IO board K2 and the KI02 AUX IO module - THIS KIT HAS NOT BEEN OPENED (other than the box it was shipped in) and has NOT BEEN STARTED. All paperwork included and all in the same box with the kit - selling as a pair. That's a $40 saving and getting the IO board free (and free shipping). $700 shipped to your door in the US. Thanks much Dan - KI4YZE Cellphone = 770-377-6000 __ 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] FS: ELECRAFT UNBUILT K2 and the KI02 AUX IO board
K2 and the KI02 AUX IO module - THIS KIT HAS NOT BEEN OPENED (other than the box it was shipped in) and has NOT BEEN STARTED. All paperwork included and all in the same box with the kit - selling as a pair. That's a $40 saving and getting the IO board free (and free shipping). $700 shipped to your door in the US. Thanks much Dan - KI4YZE Cellphone = 770-377-6000 __ 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 - Time on K2 Finals
John, I don't know of any lifetime issues with the K2 finals or any other transmitter with a solid state PA. That was an important consideration with tubes, so maybe it was just an "old school" statement. The K2 PA transistors are quite hardy, but if one abuses them sufficiently (for instance transmitting into a high SWR at high power), they will turn "belly up" in short order. 73, Don W3FPR On 11/12/2011 8:59 AM, John wrote: > On 11/11/11 10:24 AM, Hunsdon Cary III wrote: >> rig has less than two hours on the finals; > Just wondering why "less than two hours on the finals" is important. Do > K2 finals have a lifetime issue? > > __ 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 - Time on K2 Finals
On 11/11/11 10:24 AM, Hunsdon Cary III wrote: > rig has less than two hours on the finals; Just wondering why "less than two hours on the finals" is important. Do K2 finals have a lifetime issue? Thanks. John, kx4o __ 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] Accessory Build order
Having done this several times myself, my advice would be to do it all at once. There is a certain amount of "overhead" removing screws, breaking into the radio and moving stuff around to get to the parts. It is pain to do that multiple times. Just get it over with. Buck k4ia K3 # 101 On 11/12/2011 8:35 AM, KC9QQ wrote: > Don, > > Thanks for you detailed reply. I think I will install the KIO2 first so I > can interface the K2 to my computer for CW contesting. > > I don't know if I was being very patient or just afraid I would break the K2 > which was already working so well! > > Fred, KC9QQ > > -- > View this message in context: > http://elecraft.365791.n2.nabble.com/Accessory-Build-order-tp6987212p6988060.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
Re: [Elecraft] Accessory Build order
Don, Thanks for you detailed reply. I think I will install the KIO2 first so I can interface the K2 to my computer for CW contesting. I don't know if I was being very patient or just afraid I would break the K2 which was already working so well! Fred, KC9QQ -- View this message in context: http://elecraft.365791.n2.nabble.com/Accessory-Build-order-tp6987212p6988060.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] K3 Test
Testing mail filters -- R. Kevin Stover AC0H __ 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] (no subject)
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