Folks, I've been monitoring 500 kHz using the Rx Antenna port with a home made loop. (Wayne suggested this in an earlier reflector email since the Rx Antenna port bypasses the bandpass filters.) Works fine. I can hear KSM and local liberty ships loud and clear. But ...
There is a strange spurious signal at 500.000 kHz +/- 2Hz. It seems to be coming FROM the K3 since I can null it out by turning the null of my loop towards the K3, and also peak it by tuning the loop to resonance. But it is not audible on the K3 when all antennas are disconnected. There are also identical signals at 490, 510, ..., and even at 1680 on the other side of the AM BCST swamp. The strange thing is that this spurious signal is present ONLY when the NB is activated on the K3. (And, yes, I do mean NB and not NR.) Where in the K3 is there a 10 kHz oscillator that is turned on and off by the NB button? 73, Oliver Johns W6ODJ ______________________________________________________________ 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
