by EWBrown » Thu Dec 31, 2009 2:13 pm
That trannie sounds about right, the original 5E1 and similar circuits used 325-0-325 @ 70 mA, 5V @ 2A and 6.3V @ 2 or 3A. The Triode Electronics replacement trannie has the same ratings
The ideal SE 6V6 package si one of these power trannies, a 4H, 90 mA choke and teh TF-103-48 5K UL SE OPT with 4 and 8 ohm secondary. Any 5K to 4 or 8 ohms will work just as well.
The 300VACX 1.4 = 420VDC would be for an unloaded PSU, once the tubes start drawing current, the voltage will go lower. Between the 6V6 and the 12AX7, it is going to draw around 50 mA and betwen the choke and a series resistor, the B+ can be brought down to desired voltage levels.
If your power trannie has 3A available on the 5VAC winding, then a 5U4GB or 5R4 could be used, these have more forward voltage drop. They're raller and "fatter" so they'll need more space. They haev the same generic "2, 4, 6, 8" pinout as the 5Y3GT, so they are readily interchangeable.
In any case these vintage amps never really ran at 325V, I've seen them between 350 and 380V. 6V6s are pretty tough tubes, and from what I've read the J/J ones are especially hardy, almost a slimmed down 6L6.
HTH
Happy New Year
/ed B
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