[Johnson] Johson Screen Supply Choke

[Rodger]

There is a good explanation of this on the internet, unfortunately 
mailman.qth.net treats the link as spam and rejects it so to get there 
do a google search for screen choke modulation and near the top of the 
results is a google books result with the title Power Vacuum Tubes 
Handbook and this provides a great explanation of the function of the 
screen choke.

Although I hate spam this anti-spam software is probably worse than the 
spam.

Rodger WQ9E

Tom Elmore wrote:
> Can someone please explain to me how the choke in the screen operates in regards to AM operation? When
> operating AM with say my Viking desk kilowatt is the choke in the screen supply in addition to providing voltage regulation, blocking audio from getting back into the screen supply? When audio is applied to the plate of the final (4-400) from the modulation transformer does it appear on the screens at the same time?
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> -Tom  / KA1NVZ
>
> Anchorage, Ak.
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