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Mystery Cap in an early (two 45s) Model 90
OZ4
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Posts: 285
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City: Tehachapi. California
#5

04-01-2016, 01:26 PM
It's interesting to note that this cap is missing on Ron's drawing.  It looks like an rf bypass cap for the b+ voltage on the plate circuits. (the D circuit) With the poor drawing quality it's hard to be sure . It probably is not critical and was added as a precaution to keep rf off that line. I would think a value of .1 to .47uf was used.
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RE: Mystery Cap in an early (two 45s) Model 90 - by OZ4 - 04-01-2016, 01:26 PM



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  1. The PHILCO Phorum
  2. Philco Radio Discussions
  3. Philco Electronic Restoration