Hi Ian, As far as I can tell, the rasp/buzz issue related to power supplies has to do with magnetic fields coupling into L30 on the right side bottom of the K2. This messes up the VFO frequency, so it should also mess up SSB transmit and receive both. Is it possible that you have a problem with the side tone? Hold down SPOT - if that sounds raspy the problem is with the side tone.
If the side tone is clean, flip the K2 on its side. If the rasp/buzz changes a lot, its a magnetic field from somewhere. Look for a "wall wart", a fluorescent ballast, or some kind of unfiltered DC line close to the K2. Also, look at the ~7 MHz birdie tone using spectrogram. A 60 Hz magnetic field will cause the 600 Hz tone to have side bands at 60 Hz intervals due to the FM modulation of the VFO. (The structure might be a little funny looking because of 60 Hz harmonics on the magnetic field.) 73 and Good Luck, Masleid, AB9GV -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Ian J Maude Sent: Friday, February 11, 2005 8:23 AM To: elecraft Subject: [Elecraft] CW tone Hi all, I have seen this so many times but have been bitten by it. I have just started to get back on the key and my tone is awful. Raspy and buzzy. The tone on Tune is fine. SSB is great. I have moved the PSU well away (Revex 30A, Regular PSU) and even tried using one even further away, easily 5 feet and about 3 feet above it (Farnell Switch Mode). I have the same problem with both. I have removed the PA and tried but still the same. Ideas would be appreciated. Many thanks Ian -- Ian Maude G0VGS Morecambe Lancs UK | [EMAIL PROTECTED] Sysop of GB7MBC, the Morecambe Bay Cluster Running Linux and DXSpider | K2 #4044 _______________________________________________ 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 _______________________________________________ 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
