David, Thanks for quick answer! I operated using car battery. Voltage was about 12.3V and during transmition sometimes decreased to 11.x. But in October I have been using also 12V battery working a few hours from the beach and had no problem. However thank you so much for your advise. I will check tonight how it will behave when I use a power supply. By the way - the issue appered after a few QSOs. I am very angry because I heard on my car mobile antenna many DX station with reports 59+ (e.g. VK3LPG, VK8GM, RW3LG/mm - operating form Indian Ocean) and couldn't call them. I came for a short visit to 5B land and I am not able to use my radio :(. Best 73 & HNY! Jacek SP5APW
2012/12/29 David Ferrington, M0XDF <m0...@alphadene.co.uk> > Did you check the battery voltage? This sound rather like a problem I > experienced when on an adjustable PSU - I later found the voltage from the > PSU was low (although I haven't yet checked the K3 is still ok). > 73 de David, M0XDF (K3 #174, P3 #108) > > On 29 Dec 2012, at 15:54, sp5apw wrote: > > > Today, during mobile operation on battery powered K3 I experienced a > > modulation problem. When I started to transmit my signal became over > > modulated (even mic gain was low) and I didn't hear my voice in > headphones > > (I have switched on voice monitoring) but heard noise. Even in case when > I > > stopped to talk (but PTT was pushed) the signal was still over modulated > by > > noise. Only in case when PTT was pushed by I didn't started to talk the > > transmission wasn't modulated. But as soon as I started to talk it > started > > to be transmit noise. On the beginning I taught that my mic was > > out-of-order but I tried to use computer mic connected to rear mic socket > > (of course I changed configuration :) to rear mic) but the problem > appeared > > again. So, it means that this is not a mic issue but a damage of the rig. > > May somebody advise what to do? Sorry for my poor English. > > Jacek SP5APW > > ______________________________________________________________ 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
