[Amps] ALPHA 77
Mon, 5 Aug 2002 22:13:30 -0400
Maybe I have missed something, you wrote in an article in QST in March 1989
titled "Calculating Power Dissipation in Parassitic - Suppressor Resistors"
on Page 26 You stated that "After the amplifier has been tuned for maximum
output, a slight increase in linearity can usually be secured by increasing
the amplifier loading - that is by decreasing the loading capacitance -
until output power decreases by a few percent."
I have followed this guideline for many years and I have always had great
----- Original Message -----
From: "2" <firstname.lastname@example.org>
To: <email@example.com>; "Phil Clements" <firstname.lastname@example.org>;
<email@example.com>; "Bob" <K8MLM@aol.com>; "AMPS" <firstname.lastname@example.org>
Sent: Monday, August 05, 2002 7:46 PM
Subject: RE: [Amps] ALPHA 77
> >> >This "clean" isn't limited to the IMD
> >> >performance of the amp.
> >> Harmonics/spurs
> >> >are also reduced by this
> >> slight antenna
> >> >overloading, usually by 5-15dbm.
> >> >Paul
> >> >
> >> ** Heavier loading means
> >> less load-C. Are you saying
> >> that less load C
> >> shunting the output reduces harmonics?
> >Yes, this is what I observe on my
> >analyzer. Lighter loading runs up IG
> >and doesn't have much effect on the
> >harmonics or spurs.
> So a few % heavier loading has no noticable effect on harmonics.
> tnx, Paul
> - R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,
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