Cookie Thanks for you response. I have this noise into an open, short and 50 ohm load. I believe it's coming from the K3 itself. If you study how a synthesiser works with it's phase locked circuitry, it's highly likely to be the source. However, I haven't don a scope probe on the output of the circuit to know for sure.
73, John W1QS, ex N6JL On Jun 26, 2009, wrco...@flash.net wrote: John, I spend a lot of time on ten and a fair amount on six. I usually operate CW with most of my activity around 28.05. I hear some noise on ten meters occasionally when the band opens which I attribute to broad band interference coming in on skip. It varies with beam heading, but not with any tuning parameters. I have speculated that it may be a Broad Band over Power Line artifact, but I can't confirm that. Does your noise go away if you switch to a dummy load, or change your beam heading? Willis 'Cookie' Cooke K5EWJ --- On Fri, 6/26/09, John Lawrence <j...@hughes.net> wrote: > From: John Lawrence <j...@hughes.net> > Subject: [Elecraft] K3 VFO tuning hash > To: elecraft@mailman.qth.net > Date: Friday, June 26, 2009, 10:20 AM > Now that 6 and 10 meters have been > open to Europe and Africa, I frequent > these bands for the first time in the six months of owning > a factory built K3 radio. > > What I've discovered and reported to factory tech support > is a very noticable hash noise > while in the receive mode with any bandwidth centered > around 28.000 MHz to 28.050 MHz. And, it is also > present while tuning RIT. It sounds like synthesizer > switching noise and its repetition rate increses when the > VFO is set to fine > tuning. I do not hear it on any other band. I also > don't hear it over the entire 10 meter band, just the region > as stated. > > Is this in other K3s or is there something going on that > needs attention in only my radio? I called factory > tech support over a week ago. Since they have not come > up with an answer it seemed time to open it up to a wider > group of users. > > Thanks > > 73, > > John, W1QS > ______________________________________________________________ > 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
