[Amps] OT: RF Speech Processor Kits - Final Final

[Kenneth D. Grimm, K4XL]

Steve Thompson wrote:
> Ken G3WCS wrote:
> 
>>Thank you to everyone who contacted me both on and off list.
>>
>>Quite a lot of folk pointed me to audio clippers rather than RF
>>Processors. Just for the information of the guys who don't know, there
>>is a difference between the two.
>>
>>An audio clipper simply either compresses or clips (or both) the audio
>>signal. This can (and often does) result in 'whiskers' or splatter
>>which make the transmitted signal wider. This was not the design I
>>was looking for.
> 
> Just for the record, can I mention that the split band audio clipper I
> referred to isn't a simple compressor/clipper that generates lots of
> harmonic distortion and splatter. By splitting the audio into sub-octave
> bands you can clip each one, and then remove the harmonics, before
> recombining so you end up with the same effect as rf clipping.
> 
> Steve

The Split Band Processor designed by Wes Stewart, N7WS, described in Ham 
Radio back in 1979 and mentioned previously, with the Vomax, is the best 
audio gadget that I've ever built.  It works exactly as you describe 
above.  I was able to mess around with the individual channels to 
achieve the kind of audio that I wanted.  I used it with a Collins 
KWM-380 and got better reports from it than other folks did running the 
Collins processor designed for the 380.  I've still got it and use it 
with my TS-940 and Drake T-4XC occasionally.  Most of the stuff that I 
build, I wind up giving away after a while.  Not this little jewel! 
It's a keeper.

73,
-- 
Ken K4XL
k4xl at arrl.net

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