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Re: NF Trimming.



Anther good source for signals, Zack is any cell site that is line of
sight from the listener.  There are so many signals coming from these
"busy" elevated areas that there has to be a signal somewhere in the
passband.  As you, I found the FM detector below limiting best. Cliff K7RR

On Fri, 25 May 2001, Lau, Zack,  W1VT wrote:

> I'd suggest listening to the output on a WBFM receiver 
> and tweaking the preamp for best quieting while listening
> to your weak noise source.  The threshold is reasonably
> sharp.  Widening the receiver bandwidth to several MHz
> would make the threshold effect even sharper.  You could
> put a battery powered source inside a small metal tube
> to make an adjustable weak signal source--if the tube is
> small enough to act as a waveguide below cutoff.
> 73--Zack W1VT
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