04-12-2013, 06:55 PM
Like I said, transformers for these tubes are pretty much universal swap-out. DC resistance isn't much of a determining factor, as different manufacturers used different cores, different wire sizes, etc. which add up to different DC resistances. Impedence is what is more critical, and all the transformers used with the L6/C5/B5 series of tubes in AA5's are designed with the proper impedence.
What confuses me is that you are getting cathode current through the output tube with the transformer open. In this case, there should be no current at all (no plate voltage).
If the Hammond transformer is only 2mA max DC current, it will not work. The plate current through that tube is much higher.
What confuses me is that you are getting cathode current through the output tube with the transformer open. In this case, there should be no current at all (no plate voltage).
If the Hammond transformer is only 2mA max DC current, it will not work. The plate current through that tube is much higher.
