I had a problem like that once and it turned out to be my faulty connection of the bifilar winding on the input filter. Even though it did work on the desired frequency, it had much better response on another frequency. I swept the input with my DDS-60 to find where it really was receiving. Rewinding fixed my problem.
73, Gary --- In [email protected], Pete Smith <[EMAIL PROTECTED]> wrote: > > This morning, for the first time in a while, I was using Rocky with my 20M > SoftRock. Imagine my surprise to see a large and varying hump around the > local oscillator frequency. I set Rocky for USB and tuned to the LO > frequency, and voila - the Chinese shortwave service, in English! > > With my ordinary receivers, I cannot hear this signal at all, so I presume > it is some sort of mixing product. It is definitely coming in over my > antennas, but aside from that I have no clue. Can anyone suggest what > might be causing this? > > As a PS, I am also seeing an AM signal on 14010, broadcasting music, but > that one looks normal on the bandscope, with a carrier and sidebands. I > can hear it on both ordinary radios. I have not heard it identify so far. > > 73, Pete N4ZR >
