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Like Warren said, don't touch the micas - they have the presumption of innocence unlike the other parts.
try the cap #38, and then 39 if you choose to do it one by one.
Oh...and another question: does this happen in ALL the tone control positions? Make sure it is all of them, or maybe one of the tone control caps (#43) is bad.
Messages In This Thread
RE: Goes Dead, Philco 45 - by morzh - 09-11-2013, 02:59 PM
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I posted this on FB but knowing that not all of us use social media, it seemed sensible to ask my question here.
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Or you could just square the current :lol:
As for the values, they are dependent on the 1 or 2-speaker system.
The...morzh — 05:46 PM |
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If you know the fc resistance you can use 120 ma nominal current through the resistor to get the voltage drop then calcu...RodB — 05:21 PM |
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Thanks Mike. I at least know why it is there if I don't fully understand it. I see where you talk about a cap and resist...dconant — 04:49 PM |
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Well, this cap you showed cannot possibly, due to the way it is constructed, be 1000pF (0.001).
It can be in tens of pF....morzh — 03:13 PM |
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I have two schematics for this radio one shows the 47 block (126-226) and the other (121-221) does not. My radio does no...dconant — 02:32 PM |
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No, that cannot be the 47.
The 47 is a regular backelite block cap. Look at the chassis picture, it is shown there. Rig...morzh — 01:45 PM |
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I have changed the title of this thread from Philco 91 Schematic.
I have gone through most of the cap replacements. I...dconant — 01:26 PM |
462ron
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Here is an online transistor substitution site…
Ron462ron — 08:44 AM |
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