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Original Message
RE: Searching for Angela Instruments Schematic for conversion of Dyna ST70 to 6B4G??? Thx!
Posted by CharleyW on July 25, 2012 at 18:52:13:
The Sovtek 6B4G's work just fine at ST70 voltages with cathode bias. At least two of us (a guy who goes by Zacster and I) implemented it using the Curcio premium input board. I used a 5R4 "potato masher" rectifier to knock the B+ down a bit.