I've a Peavey Stereo 60/60 which has had its stock power tranny replaced with what seems to be a bit of a rare Sunn T50 PT. Number on my unit is A-0051463000. I'm wanting to find out what the secondary voltages are. I've measured but not sure they're right. Its one of these:
The way you measure the V+ voltage of a PTs secondary winding is with them disconnected.
Also important is the amount of current/ millamps that the V+ secondary winding has to power the overall circuit its feeding.
The Peavey amp has 60 watts rms a channel for a total of 120 watts rms, the Sunn T 50 only has 50 watts rms at best.
Simple math will tell you that the Sunn power transformer is in no way capable of powering the Peavey circuit as it should!
Since both amps use 6L6 tubes lets compare just the pure output sections.
With a average of 430 volts to feed the output transformer and 2 output tubes, if you where looking to make even just 55 watts of rms output the output stage itself would need 220 millamps to run its self.
Since the Peavey has two of these sections the Sunn transformer is way out of its league for this purpose!
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