12bh7a retifier

Greetings to all,

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.

south4309-29-2010 8:00pm

6 responses Add your response

cfchew Details Discussions Posts This discussion Message User 13 posts 09-30-2010 at 01:37am Copy Comment URL Report Comment Edit Delete The 6CG7 is the closest 9 pin tube to an octal 6SN7.
south43 OP Details Discussions Posts This discussion Message User 386 posts 09-30-2010 at 05:59am Copy Comment URL Report Comment Edit Delete Thanks for the info Cfchew.
jax2 Details Discussions Posts This discussion Message User 3,031 posts 09-30-2010 at 01:40pm Copy Comment URL Report Comment Edit Delete Neither the 12bh7 nor the 6SN7 tubes are rectifiers. The 12bh7 is a 12volt tube and the 6SN7 is 6 volts. They are not compatible in the same circuit.
south43 OP Details Discussions Posts This discussion Message User 386 posts 09-30-2010 at 04:20pm Copy Comment URL Report Comment Edit Delete Jax2 if the 12b is not a rectifier then what is it doing in the circuit? If I'm not mistaken the P3 does not have SS rectification.
rrog Details Discussions Posts This discussion Message User 1,958 posts 09-30-2010 at 04:36pm Copy Comment URL Report Comment Edit Delete 12BH7 is not a rectifier. It is in the circuit because it serves as an output tube in your preamp.
south43 OP Details Discussions Posts This discussion Message User 386 posts 09-30-2010 at 08:04pm Copy Comment URL Report Comment Edit Delete 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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