RF Decoupling in Good Ole Tube Receivers and Transmitters

Filament bypassing (low impedance)  .1 @ 25 VDC Disc Ceramic short leads

High Power Transmitting tube filaments .1 Silver Mica


Screen Grids (medium impedance) .01


Plate decoupling (medium impedance) .01


Grid decoupling (high impedance)  .005


If a Modulated RF Final do not enter substantial  capacitive reactance for +4 KHz corner

Filament .1

Screen Grid .002

Plate  .005

Control grid .001

Regardless of modulating the Plate/Screen   or Screen grid alone

Audio will appear on active elements I.E.  grid, screen and plate, therefore do not audio frequency corner the elements differently



more on a rainy day  73  John