10-24-2010, 08:16 PM
I'm doing well, thanks.
The change in tone is very gradual, not dramatic, with that tone control circuit. Philco later switched to a different circuit cutting three .003 uF caps in and out of the plate of the first audio tube. That tone control has more noticeable changes from high to low.
If you can find a Model 16 - Code 125 and 126 (4-band) schematic, you will see that tone control circuit. Philco also used it in the late production of the 5-band 16 sets.
The change in tone is very gradual, not dramatic, with that tone control circuit. Philco later switched to a different circuit cutting three .003 uF caps in and out of the plate of the first audio tube. That tone control has more noticeable changes from high to low.
If you can find a Model 16 - Code 125 and 126 (4-band) schematic, you will see that tone control circuit. Philco also used it in the late production of the 5-band 16 sets.
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Ron Ramirez
Ferdinand IN
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