Hello Group, I've been using my K2/100 on CW a bit lately and have noticed that there are low frequency thumps/pops on the receive audio at the rx to tx transition - ie onset of keying (key closure). They are most noticable if the noise floor is high or if there are other signals in the receiver passband. If I wind the RF gain right back or operate on a really quiet band and the artefacts disappear.
They don't relate to the DSP (they occur even when DSP is bypassed), to the state of the 8R Hold parameter or to the presence or absence of transmitted RF (the artefacts are present also in TEST mode). I see there is mention of this issue in the K1 in an application note found here: http://www.elecraft.com/Apps/K1_qsk_app_note.htm It describes what I hear in my K2. Does anyone know if there is a similar mod for the K2, or whether this K1 mod might be relevant to the K2 if adapted? Thanks for any ideas. 73, John VK7JB -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-audio-thumps-and-pops-on-key-closure-is-K1-app-note-relevant-tp7467081p7467081.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
