I saw a ad somewhere that said the 12bh7a was the same as a 6SN7 tube in a nine pin configuration. Anyone agree with this. I use the 12b in my N.E.W P3 preamp. Enjoy the music.
Rrog thanks for the info. I suppose then the 12au7 tubes are for the input part of the circuit. I may get a hold of Dennis at Cary for additional info.
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