>>>Rich Measures said:
> > >
> > // Few AB1-grid driven. or AB2-GG amplifiers have as much distortion as
> > modern transceivers. Many of the dirty signals that I hear seemingly
> > involve operator ignorance and/or over-exuberance.
Steven Katz responded tongue in cheek:
> ::You mean the, "damn the torpedoes, all knobs to right!" theory of
> operation is not the correct one? Darn...-WB2WIK/6>...
Ian White responded:
>Good point. It emphasizes that the performance of an amplifier is a
>combination of several things:
>* The tube(s)
>* The circuit configuration
>* The power supply
>* The operator who tunes, loads and drives it.
I have a question. I tune for max power out with min grid I and plate I no
greater than ICAS spec. I seem to remember someone recently stating that
adjusting the load just to the point of the power dropping off sharply
increases IMD performance with only a slight loss of power out.
The three posters suggest there is a method of tuning which improves IMD, but
fail to state it. Can someone tell me how and more importantly why for someone
who does not know (a.k.a. me!!)?
I run with my TS-850 set with ALC as prescribed in the manual and compression
peaking at 10%. The exciter power varies with the efficiency of the amp on a
particular band (I keep plate current to spec as I don't care to lose a
transformer to overheating again!!!).
73 es God Bless de KK1L...ron (email@example.com) <><
QTH: Jericho, Vermont
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