[TenTec] Omni-D (Ser B) - Popping on some 10m bands

[Dr. Gerald N. Johnson]

That's usually how oscillating RF stages are detected. Such oscillation 
often does affect operation by mixing in out of band signals and noise 
to obscure signals on the desired band. The question that needs to be 
answered is whether its still oscillating when tuned for 29 MHz instead 
of way off where you find it oscillating.

73, Jerry, K0CQ

On 4/6/2010 11:39 AM, David Goncalves wrote:
> I have observed this, and it doesn't seem to affect operation, but it is
> very odd...
>
> Only happens in the 28.0 and 29.0 bands. When rotating the RESONATE control
> through the 7-14 MHz region, I hit these points where I get a little pop; if
> I am careful, I can tune in this sqealing noise. The resonate control works
> well enough otherwise, bringing the bandground noise up when turned to the
> region of the band.
>
> Check the 9MHz null according to the manual. No issue there.
>
> Is that normal? I wonder if I have a little oscillation in the RF amplifier
> section.
>