[Collins] S-line PTO query

[Jim Brannigan]

Hi Jerry,
I saw you note in the CRA archives,  and thank you for the fine tutorial on
the PTO.  My 75S-3B has a factory installed zener for the screen voltage.
When the PTO is re-installed I will let you know how it all works.

73, Jim


> The by pass capacitors probably won't affect the FMing. That comes from
> voltage variations. Cured only by regulating the SCREEN voltage to the
> oscillators. I used a 125 or 150 volt zener diode in my 32S1 to
> accomplish that cure. Regulating the plate voltage had no effect. Has to
> be the screen voltage.
>
> 73, Jerry, K0CQ, Technical Advisor to the CRA
> --
> Entire content copyright Dr. Gerald N. Johnson, electrical engineer.
> Reproduction by permission only.