I have just constructed a K9AY loop system to use a receiving antenna on 160m and since I am now using the RX antenna socket I am noticing a problem that I haven't seen before with my K2
When I have the RX antenna selected (even with no antenna connected) i have break though from broadcast stations on 160m. these are not as far as I can tell local AM stations but are from HF. I can't discover any obvious (to me anyway) harmonic relationship except that they are inverted (tuning up in frequency appears to actually tune down the BC band stations this occurs even with no RX antenna when the RX antenna socket is selected and the stations are there weakly even with no antennas whatsoever connected to the K2 (presumably the DC, speaker and key wiring is enough to pick up quite a signal on hf in Europe) I can find no obvious cause except that selecting the RX antenna allows some stuff to slip past the low pass filters ? I only see this on 160m as far as I can tell. 73 Brendan EI6IZ -- Brendan Minish -- Brendan EI6IZ <[EMAIL PROTECTED]> _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
