juergen piezo wrote: > > Just noticed this when playing around with the K3's monitor. > > With the Gate off > EQ flat > MH2 hand MIC > TX test mode > Band 7mhz > > While whistling there is a odd artifact. If I whistle I get a sound that > sounds like a oscillator pulling in a receiver. I dont get any odd sounds > with normal voice testing > > .With a continuous whistle I get this artifact that is a mirror of the > whistle, however it seems to shift frequency or pull the louder you > whistle.It might be a IMD product? I have never noticed this before in > the K3's monitor. I will also check the clubs K3's and report back. > > Anyone else get this? >
Are you using headphones or the internal speaker? If the latter, physical microphonic modulation of the VCO can cause spur artifacts. I've never experienced this because I never use the speaker, but I've noticed it on CW signals from other K3s. The audible PITCH tone can modulate the VCO causing spurs at +/- PITCH setting. I suppose the same could happen in SSB if MONITOR volume were high enough. Elecraft has a stiffener/damper fix for the VCO board if this is the problem you're having. 73, Bill -- View this message in context: http://elecraft.365791.n2.nabble.com/k3-TX-Monitor-some-odd-sound-beta-tp4997305p4998207.html Sent from the Elecraft mailing list archive at Nabble.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
