K2 Question(s)
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Hi - I have been playing with a newly purchased K2/100 (an older 19xx serial number with numerous "factory"mods/ updates to 2008 and 2.04P firmware, NB, and SSB). I am at a disadvantage in that I didn't build it myself and am not familiar with it "under the hood". Road testing the K2 for the 1st time in FD, I noted several items and am not sure whether to label them "quirks" or "problems"... (before posting here, I DID look at the manual, used a search engine and browsed this list's archives)
-- When using it for the 1st time, when I pressed the mike button a few times, the power would cycle briefly; I would see the "Elecraft" logo and it would return to freq. I checked the SWR and confirmed that it was well below 2:1. I used an LDG Z100 ATU to a G5RV. I did double check the power connections from the K2 to my Astron 20 and have been running it at 95 W and less (the display goes up to 111 watts all the way C-W). I have been using the PS with no problem on my other rig, a FT-857D - I noticed sometimes that when hitting the mic button, the display will sometimes briefly resister the HI CURRENT warning...also, sometimes, only briefly just before the ATU kicks it in tune, but sometimes it is when the SWR is close to 1:1 during the course of normal operations. I note that the CAL/CURRENT threshold is set properly to the 3.5 amp default. - One time, the RX audio from the speaker went dead - without me touching anything. I tried plugging in an external speaker and it was still dead. I turned the rig off and on, and it was OK. This has happened only once I used the radio for 3-4 hours heavily on 3 bands during FD and it worked great. The above problems did not really get in the way, but I am concerned that they might indicated a problem(s) that needs to be addressed. Any clues greatly appreciated.... you may reply direct if you wish. It is a sweet little rig. I hope it is OK -73 de John, k7hv jparnellATigc.org AT=@ for anti spam ______________________________________________________________ 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 |
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John,
There are several possibilities on the power tripping off (which is what has happened when you see the "Elecraft" in the display). First is that the diodes in the KPA100 wattmeter D16 and D17 have been damaged by lightning or some other static from the antenna (we will likely see a number of those following Field Day). You can check for that condition quickly by checking the power output with an external meter and the K2 power requested set to about 20 watts. If the actual power output is much greater than the requested power, then there is a problem with the KPA100 wattmeter, and the diodes are the first suspect. The same condition can explain the HiCur messages. I don't have an answer about the lack of RX audio - it sounds like it got stuck in transmit for a bit. It is not a relay (unless it was in the tuner), the K2 T/R switching is entirely electronic. 73, Don W3FPR John Parnell wrote: > Hi - I have been playing with a newly purchased K2/100 (an older 19xx serial number with numerous "factory"mods/ updates to 2008 and 2.04P firmware, NB, and SSB). I am at a disadvantage in that I didn't build it myself and am not familiar with it "under the hood". Road testing the K2 for the 1st time in FD, I noted several items and am not sure whether to label them "quirks" or "problems"... (before posting here, I DID look at the manual, used a search engine and browsed this list's archives) > > -- When using it for the 1st time, when I pressed the mike button a few times, the power would cycle briefly; I would see the "Elecraft" logo and it would return to freq. I checked the SWR and confirmed that it was well below 2:1. I used an LDG Z100 ATU to a G5RV. I did double check the power connections from the K2 to my Astron 20 and have been running it at 95 W and less (the display goes up to 111 watts all the way C-W). I have been using the PS with no problem on my other rig, a FT-857D > > - I noticed sometimes that when hitting the mic button, the display will sometimes briefly resister the HI CURRENT warning...also, sometimes, only briefly just before the ATU kicks it in tune, but sometimes it is when the SWR is close to 1:1 during the course of normal operations. I note that the CAL/CURRENT threshold is set properly to the 3.5 amp default. > > - One time, the RX audio from the speaker went dead - without me touching anything. I tried plugging in an external speaker and it was still dead. I turned the rig off and on, and it was OK. This has happened only once > > I used the radio for 3-4 hours heavily on 3 bands during FD and it worked great. The above problems did not really get in the way, but I am concerned that they might indicated a problem(s) that needs to be addressed. Any clues greatly appreciated.... you may reply direct if you wish. It is a sweet little rig. I hope it is OK > > -73 de John, k7hv > jparnellATigc.org > AT=@ for anti spam > > ______________________________________________________________ > 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 |
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