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The old transformer had 3 secondaries: 360-175-0-175-360v 195ma/40ma, 5v 3a, 6v 9.1a.
The new one has 6: 375-325-0-325-375v 170ma/130ma, 5v 3a, 5v 3a, 6.3v 7a, 6.3v 7a, 6.3-5v 2.7a.
One of my concerns is with the 6.3v filament winding, it seems if I just use one 6.3v 7a winding the current is too low, if I parallel them it is too high. Now as for the 6X5, if these rectifier tubes using a cathode are such a problem, I could take the 2nd 5v 3a winding and put in another 5U4 instead, I would think a 5U4 would work better than a 5Y3 because isn't a 5Y3 only a half-wave rectifier.
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