Topband: MFJ noise canceller

[Donald Chester]

I purchased a MFJ noise canceller at Dayton this past year.  I haven't 
played with it much, but my first impression was a substantial reduction in 
s/n ratio with the signal going through the thing.  It would pick up strong 
signals, and using two antennas I could get a good null,  but I think a weak 
  signal would be totally  lost in the background noise.

I haven't tried inserting mine between my external preamp and receiver, but 
I would have thought the built-in amplifier amplifier stage would have 
better performance than that.  Is this normal with this unit, or maybe 
something is wrong with mine?

I haven't taken much time with it, but the annual power line malfunctions 
have started.  I don't know if it's Murphy's Law or maybe the cooler 
temperatures, but every year, precisely when the atmospheric QRN goes away, 
the power lines here start acting up.  This year I had about a two-week 
window of good receiving before the line noise began.  Hopefully the MFJ 
unit will provide some relief.

Don K4KYV

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