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City: Irvington, NY
Will, I have a feeling that your replacement winding is not the problem, but there is an issue with the other windings, or other parts of the osc tuned circuit. Anything associated with the coil or tuning cap which causes a lack of feedback or additional loss will make the osc marginal.
Keep in mind that even with Greg's winding reversed, he still got oscillation, albeit at SW freqs.
Maybe you need to find another osc coil to try, and if necessary rewind to see if the coil is actually the problem or it is something else.
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RE: Model 89 Cathedral - by Mondial - 03-13-2014, 08:14 PM
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Philco 91 Restore Code ??
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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 |
Philco 91 Restore Code ??
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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 |
Philco 91 Restore Code ??
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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 |
Philco 91 Restore Code ??
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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…
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