Re: RCA Modulation Transformers

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Ray von Postel by way of Terry Fritz <teslalist-at-qwest-dot-net>" <vonpostel-at-comcast-dot-net>


>Original poster: "by way of Terry Fritz <teslalist-at-qwest-dot-net>" 
><dhmccauley-at-spacecatlighting-dot-com>
>
>
>
>The input side of the transformer has the one center-tapped winding which
>the audio modulated push-pull tube circuit is fed into.
>The output winding is where the plate voltage (now modulated) would wire in
>series with.
>
>However, there are three additional contacts (possibly another center-tapped
>winding) on the same side of the output side but smaller in
>size than the output modulated winding.
>
>Anyone have an idea of what this winding was for???


Some transmitters were built with a separate power supply for the screen 
grid of the r.f. amplifier.  The screen and plate were both modulated by 
their own windings on the secondary of the modulation transformer.

Ray