[ARC5] AM linear amplification

[Spencer Petri]

Plus they are beautiful, imagine my 4-1000A 6 meter HB amp with a
shielded viewing opening in the rack panel.

On 12/19/16, Jim Haynes <jhhaynes at earthlink.net> wrote:
> I'll insert a bit of lore from Loy Barton, who invented the use of a
> class-B push pull modulator transformer coupled to the RF amplifier
> plate as a way to do AM.  (Replaced the much less efficient Heising
> modulation)
>
> He noted that it may be convenient to generate AM at a lower power level
> and then amplify it in a linear amplifier.  And pointed out that it is
> sufficient for the "linear" RF amplifier to be Class B, because the
> tank circuit will turn the half-sinewave pulses into sine waves.  It
> is only necessary for the output amplitude to be proportional to the
> input.  Which precludes a Class C amplifier but is satisfied by Class B.
>
> Loy E. Barton, "Recent Developments of the Class B Audio- and
> Radio-Frequency Amplifiers" Proceedings of the I.R.E., July 1936,
> vol 24, no 7, p. 985.
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