John Smith wrote:

[stuff]

And, by the way, when using plate modulation on a transmitter, the DC
input to plates of the transmitter has a modulated signal impressed upon
it by a modulation transformer (simply an audio transformer), every watt
of power to the xmitter is so impressed ... The DC voltage/current to
the xmitter contains the voice data--indeed, the exact same data which
is impressed onto the DC on a telephone line (voice/modulation.)

However, the real importance of this will only become clear to you when
you come out from under the influence of whatever it is you are smokin' ...

JS