[Elecraft] 270 foot (ish) Doublet K3 ATU
Hello, Does anyone use a 270 foot doublet with the K3 ATU? Is there a combination of feeder type/length and Balun type coax length that tunes OK on 160-10? I am currently thinking a 1:1 balun and 33 foot of 300 ohm feeder. Obviously the coax length should be short but too short may cause rfi probs, but then I only run 100W. Iain G4SGX --- 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Rising current on Tx (K3)
Hi Thanks for all the suggestions. I cannot re-create the effect on any other band but 10M. I have checked the PSU and its voltage O/P is stable @13.8V ish, (read on the K3) Although I shall stick some ferrites on the leads and keep my fingers crossed, (I am some way from my antenna) I suspect a failing component under stress, hopefully coax or balun and not a PA component.. Time will tell, thanks for your advice. 73 Iain G4SGX --- 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Rising current on Tx (K3)
Hello, For the sake of future searchers etc, this problem was solved by winding the 12V PSU lead through a toroid or two, as per one of the suggestions from the list. I was surprised as I am well away form my antenna. (Windom) It seems a few people had this issue on 10M TX and I know remember I may have had it mobile once or twice. All makes perfect sense now! 73 Iain G4SGX --- 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 Message delivered to arch...@mail-archive.com
Re: [Elecraft] Rising current on Tx (K3)
Apologies if this is covered before. I've just noticed some new behaviour on my K3. While on 10 RTTY chasing DX, I noticed the current indication on the PSU rising during a long TX. I switched to the current meter on the K3. At the start is was about 15Amps (100W RTTY TX) but soon rose. On a 20 second TX it rose to about 26 Amps (!) and the Hi Curr error message came up on screen. The rig USED to be OK for extended periods of RTTY. I have not tried on any other bands. Can anyone explain this behaviour? Iain G4SGX --- 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 Message delivered to arch...@mail-archive.com
