I think my HF rig is starting to dry out. I did not hear much of anything this last weekend, but I blame the antenna, excpet for 10-meter, which was absolutely dead.
Anyway, there are several sections of spectrum where I hear a loud whistling noise, which varies in pitch and scratchyness with the turn of the dial.
I'm using an old IC-710, with the 100 Hz tuning steps. One step is quiet, the next squeels like a whistling tea kettle, the next changes pitch, another step sounds a bit like one of those classic whistlers...this is an SSB mode. it is not the same as a systematic change in a clear pitch that you'd hear with an AM carrier.
Anyway, there are several sections of spectrum where I hear a loud whistling noise, which varies in pitch and scratchyness with the turn of the dial.
I'm using an old IC-710, with the 100 Hz tuning steps. One step is quiet, the next squeels like a whistling tea kettle, the next changes pitch, another step sounds a bit like one of those classic whistlers...this is an SSB mode. it is not the same as a systematic change in a clear pitch that you'd hear with an AM carrier.