From: "George, W5YR" <w5yr@att.net>
To: Joe Word <joe_word@yahoo.com>
CC: tentec@contesting.com
Subject: Re: [TenTec] Type of Speech Processing in Jupiter/Pegasus?
Date: Fri, 22 Feb 2002 13:50:42 -0600
Soft compressors and clippers have been used for years and are effective
for FM and AM modes, but can have limited effectiveness for SSB. The
problem is that if the processing is made aggressive enough to be
effective, the distortion products increase rapidly. It ends up a Catch-22
situation. The wattmeter goes up but articulation goes down.
Not a problem (apparently) for some SSB operators....as long as they are "30
over S9"
The r-f clipping and filtering approach which prevents the distortion
products from appearing in the output passband is still regarded by most
folks as the most effective process to both increase average power and
increase articulation.
72/73/oo, George W5YR - the Yellow Rose of Texas
Fairview, TX 30 mi NE of Dallas in Collin county EM13qe
Amateur Radio W5YR, in the 56th year and it just keeps getting better!
QRP-L 1373 NETXQRP 6 SOC 262 COG 8 FPQRP 404 TEN-X 11771
Icom IC-756PRO #02121 Kachina #91900556 IC-765 #02437
All outgoing email virus-checked by Norton Anti-Virus 2002
Joe Word wrote:
>
> What about distortion and gain?
>
> Joe K9MAN
>
> Absolutely correct Carl. It is the digital
> implementation of a logarithmic
> operational amplifier. Best way to increase average
> power.
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