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The resistor in the detector/AVC circuit is not critical so you can use anything close. Remember the original resistors had a 20% tolerance, so anything from 40K to 60K should be fine.
Is the volume control in your radio original? If it is I would be surprised as they usually go high in value. The one in my 89 reads about 800K but still works fine. If you are concerned about the value, you can add a 100K in series with the high side of the present control to apply the correct load to the detector. This radio has plenty of audio gain so you will not notice the slight loss from the voltage divider created.
Messages In This Thread
RE: Model 89 Cathedral - by Mondial - 02-01-2014, 11:34 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 |
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Here is an online transistor substitution site…
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