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RE: Searching for Angela Instruments Schematic for conversion of Dyna ST70 to 6B4G??? Thx!

Posted by Steve O on July 24, 2012 at 14:55:58:

There was no schematic: only written instructions on how to do the conversion. Is that what you're looking for? Also be aware that the conversion seemed to be geared towards the 6B4Gs that Angela had a for sale at the time. These 6B4s were really repinned 6AV5s and could handle higher voltages than the real thing (he musta bought a few pallet loads at govt auction before he realized that they weren't the real thing). True 6B4s will probably be stressed in the ST70 circuit.