Re: [Elecraft] Noise on received audio
Dan Schieler wrote: I have recently started noticing distorted or buzzing riding on type of the audio. This is most audible on CW with strong signals, but I can also her it on SSB voice signals as well. snip I hear it most pronounced when using the 100W amp lid, but I can also hear it when using the qrp lid. This could be a long shot, but maybe it's the old 'magnetic field pickup' problem. When I first added the KPA100 to my K2, I noticed that the sensitivity to AC magnetic fields increased. Who knows why! I had originally had a problem from my antenna rotor control box with the QRP K2, so I moved it. When I got the 100w lid, I had to move it again. So, how far is your K2 from a linear power supply, rotor control, or anything with a transformer or motor in it? Elecraft has a mod (named after me, K2VCOSHLDKT) that will greatly reduce sensitivity to such fields, but if you haven't installed this mod then you should keep all such magnetic sources at least 18 away from the K2. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Noise on received audio
Vic, thanks! You nailed it. I recently moved the K2 while 'tidying up' the cables behind the desk and moved the radio on a shelf just above my Alino DM340V linear supply.moved the rig back to its original spot and the noise was gonejust in time for an evening with the ww cw contest! Fyi, the k2 is now side by side with an Alinco switching supply but it doesn't seem to mindthe other supply has a big honkin tfrmer in it Thx again! K5gus... -Original Message- From: Vic K2VCO [EMAIL PROTECTED] Subj: Re: [Elecraft] Noise on received audio Date: Sat Nov 26, 2005 2:34 pm Size: 1K To: Dan Schieler [EMAIL PROTECTED] cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Dan Schieler wrote: I have recently started noticing distorted or buzzing riding on type of the audio. This is most audible on CW with strong signals, but I can also her it on SSB voice signals as well. snip I hear it most pronounced when using the 100W amp lid, but I can also hear it when using the qrp lid. This could be a long shot, but maybe it's the old 'magnetic field pickup' problem. When I first added the KPA100 to my K2, I noticed that the sensitivity to AC magnetic fields increased. Who knows why! I had originally had a problem from my antenna rotor control box with the QRP K2, so I moved it. When I got the 100w lid, I had to move it again. So, how far is your K2 from a linear power supply, rotor control, or anything with a transformer or motor in it? Elecraft has a mod (named after me, K2VCOSHLDKT) that will greatly reduce sensitivity to such fields, but if you haven't installed this mod then you should keep all such magnetic sources at least 18 away from the K2. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Noise on received audio
oh yeahand I need to get that mod done that you mentionedanyone know if its standard now or if it would have been part of sn 4426? -Original Message- From: Vic K2VCO [EMAIL PROTECTED] Subj: Re: [Elecraft] Noise on received audio Date: Sat Nov 26, 2005 2:34 pm Size: 1K To: Dan Schieler [EMAIL PROTECTED] cc: elecraft@mailman.qth.net elecraft@mailman.qth.net Dan Schieler wrote: I have recently started noticing distorted or buzzing riding on type of the audio. This is most audible on CW with strong signals, but I can also her it on SSB voice signals as well. snip I hear it most pronounced when using the 100W amp lid, but I can also hear it when using the qrp lid. This could be a long shot, but maybe it's the old 'magnetic field pickup' problem. When I first added the KPA100 to my K2, I noticed that the sensitivity to AC magnetic fields increased. Who knows why! I had originally had a problem from my antenna rotor control box with the QRP K2, so I moved it. When I got the 100w lid, I had to move it again. So, how far is your K2 from a linear power supply, rotor control, or anything with a transformer or motor in it? Elecraft has a mod (named after me, K2VCOSHLDKT) that will greatly reduce sensitivity to such fields, but if you haven't installed this mod then you should keep all such magnetic sources at least 18 away from the K2. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] Noise on received audio
oh yeahand I need to get that mod done that you mentionedanyone know if its standard now or if it would have been part of sn 4426? It isn't and it wasn't :-) 73, Lyle KK7P ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
