04-06-2021, 04:57 PM
Good evening. I am a new member restoring a 48-1270 and have been assessing all the components and planning to recap before applying any power. I believe the 32-8274 output transformer is defective. According to the schematic (attached) I should see 260 ohms from white lead to orange CT and 300 ohms from blue lead to CT; however, I get 146 ohms in the first case and as about 2000 Ohms in the latter. I took the capacitor out of circuit to make sure no interference from that. The tubes are unplugged as well. So, my conclusion (or SWAG) is that the transformer is defective. I would appreciate some feedback on that. Oh, btw I have a donor set that has similar readings so that has led to some of my uncertainty.
The other big question I have is choosing the replacement. According to some other posts I have read the 32-8274 is good for 9000 ohms impedance and rated 15 watts according to Philco catalog, but the 15 watts may be in error as I have another unathoritative source that says 12. Comparing size to replacements I would have guessed it to be about 10 watts. Anyway, I am planning in replacing it with a Hammond universal 125D or 125E (10 W and 15 W) respectively. I would prefer to use the 125D (10 W) due to size constraints but I am wondering what the pros and cons are in choosing between these sizes.
The other big question I have is choosing the replacement. According to some other posts I have read the 32-8274 is good for 9000 ohms impedance and rated 15 watts according to Philco catalog, but the 15 watts may be in error as I have another unathoritative source that says 12. Comparing size to replacements I would have guessed it to be about 10 watts. Anyway, I am planning in replacing it with a Hammond universal 125D or 125E (10 W and 15 W) respectively. I would prefer to use the 125D (10 W) due to size constraints but I am wondering what the pros and cons are in choosing between these sizes.
