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[Yaesu] FT-100D Noise Blanker

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Subject: [Yaesu] FT-100D Noise Blanker
From: w4clm.ham@juno.com (Carol L Maher)
Date: Wed Feb 5 15:25:14 2003
Jim,  Isn't there a level adjustment for the Noise Blanker
just outside of the Squelch control knob on the FT-1000D?
Now I may be wrong, but I think that all noise blanker circuitry
no mater who made the radio will introduce some distortion of
the audio signal when the NB circuit is working.  
Look at it this way, the noise blanker is suppose
to suppress peak noise such as repetitive A.C. popping or spark plug
noise.  In the past my experience has been, some NB circuits appear
to work or they just didn't work at all.  This was the case with the
earlier FT-101 series where as the only noise blanker the was
effective from the original manufacturing was the blanker circuit
in the FT-101B.  

Now getting back to my point, try turning on the NB then
turning down the NB level control and see if you still have your problem.
Try to find a happy medium between limiting the noise peaks while
attempting to keep the audio at a point where it's still acceptable
to the ear.  If I crank the NB control all the way up, 
I too notice some distortion of the audio signal.  Considering that the
circuit is designed to suppress noise peaks then we can assume it will
cause distortion to the audio as well.

I have a bad noise problem in my Ford Tarus, I also  have an FT-100D in
car.  The noise blanker is effective but again like you, I have some
when it's on.   I have not yet attempted to look into the menu options to
if it's adjustable.  

Just some thoughts on the subject.
Carol L. Maher
Charlotte NC

> Sometimes when signals are loud on the band they all sound like heck 
> on 
> my FT1000D
> Turning off the noise blanker fixes the problem....
> Anyone else experienced this problem - and - did you find a cure?
> 73,
> Jim, K4OJ
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