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24.42.83.12
does that mean shorted windings? I have a Scott 222B with a B+ that is almost 100V too low (around 260V instead of 350V), and the AC voltage (at the plate of the rectifier - in this one a 5V4G has been substituted for a 5AR4) is also very low, I think it was in the mid 200's AC to ground instead of 330V AC. Most of the power supply caps were replaced a few years ago. Could it be anything other than shorted windings in the PT?
Thanks in advance.
Dave
Follow Ups:
Should be around 118-125 VAC. If so...Pull the secondary wires of the PT off the rest of the circuit. Do this to remove any load on the secondary, from the rest of the PSU. Measure VAC from each leg to the center tap, again. See if these numbers are in spec with manufacturer's data for the tranny. If they are still low, you prolly need a new PT.
If both the isolated primary and secondary VAC's are ok. You may have issues downstream. Could be that rectifier you are using. An 5AR4/GZ34 should put out more voltage than a 5V4G, if the amp has the proper working PT, designed for use with the 5AR4.
Good luck! Keep us posted.
Edits: 01/05/15
Is that safe to put AC on the primary with nothing on the secondary?
Dave
But dangerous for you. Just be careful. It's a good way to test your power transformer.
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