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In Reply to: RE: Grid Choke posted by dave slagle on February 01, 2017 at 14:41:23
I wire the volume pot signal input to the pot 120K and ground the other side. The wiper is the input to next stage. So, would not the grid choke wire in-between the pot ground end and ground to lift any AC shunting to ground?
Follow Ups:
No.
If you wire it that way the grid choke will be a frequency dependent impedance in the shunt leg of the voltage divider.
The artip of the series vs the shunt values of a voltage divider determine the attenuation of a pot. If you put a fixed inductance in the ground leg you will mess things up pretty badly.
dave
I think I will not install a grid choke. Thanks Dave.
Edits: 02/02/17
and get rid of the volume pot all together. Possibly something like a switchable signal level autoformer for level control?
Never thought of a transformer as a volume control.
Transformer volume controls have been around for many years now. If you do an internet search, you will find many examples for diy. They are pricey though. I purchased a Stevens and Billington tvc years ago and installed it in my 26 preamp.
might be even better.
Tre'
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