Hi Lennart, Oh dear, this sounds tricky to solve over an email reflector. The first thing do you have access to RF test equipment? As it would be useful to look at the LO on a spectrum analyser. Your description sounds like you have lost lock due to a component changing value with the excessive heat.
I would start from scratch and re-align. Make sure you 4MHz oscillator and frequency counter is working correctly first. If it does not align or do the frequency cal does not work get back to me. I am away from home at the moment, but the more information you give me the more I can point you in the right direction. BR Andrew Lenton Lennart wrote: > > Hi, > > I have used my K2/10w a lot the last couple of years. Always a good > performer on CW and very good audio reports on SSB. The KAT2 tunes any > antenna I have tried an I have used it a lot portable. At one portable > activity last summer the radio was exposed to direct sunlight for a while > and got very hot. At that time the output power dropped sharply and > receive appeared to listen to the whole band at once. > > This has happened a couple of times since then. The receive sounds like > severe aurora noise covering almost all signals, the transmit on CW is > just a low power very wide noise as well. It must be very early in the > oscillator stage somewhere, the PLL or something stop working. If I change > band it is the same thing on the higher bands. Then suddenly gone and the > radio is OK for a moth. > > Very irritating on portable expeditions or when it happens in the middle > of a QSO. > > I have no clue where to start. I have tried to find a bad connection or > bad solder. Is there a PLL reference oscillatior that could make it act > like this, or where should I look? > > Regards, > Lennart - SM6KNL > -- View this message in context: http://n2.nabble.com/K2-Aurora-noice-tp4134494p4163469.html Sent from the [K2] 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
