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Antique Radio Technical Forum
Philco 90 Has Same Volume At All Volume Settings

Posted by Warren on 04/12/2012 18:55

By grounding this grid, that would have killed any audio going into this tube. Somewhere you may have made an error when re-capping this set. Thus bypassing this stage. This is why the volume control has no effect.
There is audio going into the 1st AF tube grid that should have come from the plate of the Det Amp tube. Check your work in this area with the clear schematic.

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Philco 90 Has Same Volume At All Volume Settings 
Johnny 04/12/2012 12:18 
Warren 04/12/2012 13:19 
Lou 04/12/2012 13:26 
Johnny 04/12/2012 14:12 
Warren 04/12/2012 15:31 
Johnny 04/12/2012 16:07 
Warren 04/12/2012 17:49 
Johnny 04/12/2012 18:09 
Warren 04/12/2012 18:55 
Johnny 04/12/2012 21:36 
Johnny 04/13/2012 15:32 
Warren 04/13/2012 17:25 
Johnny 04/13/2012 20:14 
Mitch 04/14/2012 16:54 
Edd 04/14/2012 17:28 

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