[TenTec] Noise in Omni V

[Ken Brown]

Mode of operation? Filters IF or audio tone and notch in use?

   My friend reported that the noise came through on my signal and wiped 
it out.

Really? This is an interesting fault. I don't think that rig uses any 
audio stages that are common to both transmit and receive, so an 
oscillating audio stage would not do it. Maybe an oscillation in a power 
supply regulator inside the radio. Three terminal regulator ICs often 
need bypass capacitors on input an/or output to keep them from becomming 
oscillators.

Oscillation in the IF system that has the filter that rejects the 
opposite sideband? One of the only stages that is actually used in both 
TX and RX.

Multiple tones coming out of a single BFO? If you try opposite sideband 
or different mode that would change it or make it go away, if that were 
the source.

What band? Any band you operate on or just one? What about into a 50 ohm 
terminator instead of an antenna? Do you always operate on the same 
frequency? Maybe it is an external source. Try changing frequency. Maybe 
a spur from one of the oscillators in the rig (related to idea of 
multiple tones from the BFO.)

DE N6KB