Meat Plow wrote:

On Sun, 01 Nov 2009 21:18:17 -0800, David Brodbeck
wrote:


I have an old MFJ-202B RF noise bridge I picked up used a while back.
I've been attempting to use it with my 10m transceiver, but I can't seem
to get any useful results. No matter what I connect to the UNKNOWN
jack, the noise in the receiver is lowest with the RESISTANCE knob
turned to the 0 ohms position. It never nulls completely, but as I turn
the knob clockwise the noise increases steadily from about S3 at 0
ohms to S7 at 200 ohms. I tried connecting a resistor to the output
jack, just in case the antennas I was trying to test were out of range,
and I still got the same result.

I can't figure out what I'm doing wrong, or what could be wrong with the
unit. It's a fairly simple circuit, and it does make white noise...


Do those things actually work? I've never had hands on experience with
one because my rigs have built in DSP. I'm sure what you have was
designed to work on narrow SSB signals not voice as you might be
thinking (although you made no mention as to what mode you are
operating in).
Yes they work, normally only if the noise is local..