Gents, Last night I disconnected all the antennas and started to look at basics within the shack because of my antenna problem, I decided that I should check the basics with my dummy load and found an interesting thing happening inside my K3.
What I found is that when directly connected to a dummy load and I run the k3 at full power 110 watts, as I dial up the compression above 35 on the settings , I hear a hum inside the K3 and it shows RF out power in SSB when I am not speaking into the microphone. Basically key up the mike in a quite environment in SSB mode and it goes into TX where there is output. I made a coax choke with snap on ferrites between the dummy load and the K3 to see if I could kill it but it made no difference. Also power settings below 110 did make some difference and mike gain had little to no effect. This happens on all frequencies, does not matter if on 160m or 10m. I then connected the amp between the K3 and dummy load and this noise starts at about a compression setting of 30 to 33. This is with a drive power of 40 watts into an SGC powercube, and when the humming started there was TX power on my meter. The internal noise sounds like a ferrite vibrating. Other items, power is supplied via 12v batteries using a floated battery charger, existing antennas were disconnected from the system. Is this something that others have seen or should I call Elecraft support. I am hoping I don't also have a K3 problem. Thanks Don ~73 Don KD8NNU ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
