Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: samato on September 03, 2010, 09:52:09 am

Title: Identify this tube?
Post by: samato on September 03, 2010, 09:52:09 am

I was given this 9-pin tube by a guy who finds old, beat-up organs and either fixes them or parts them out.  At some point there was red lettering or numbers on one side and white on the other but this is almost completely worn off.  All I can make out now is what I think says "8Y7" and below that "85J2" - this is in black/dark grey.

Anybody know what it is?

Title: Re: Identify this tube?
Post by: Tiny_Daddy on September 03, 2010, 01:13:10 pm

Maybe 6BY7. If you look carefully inside the tube at the bottom you can see which pins connect to what: filament, cathode, shield, etc.

Title: Re: Identify this tube?
Post by: tubeswell on September 03, 2010, 03:35:10 pm

Quote from: Tiny_Daddy on September 03, 2010, 01:13:10 pm

Maybe 6BY7. If you look carefully inside the tube at the bottom you can see which pins connect to what: filament, cathode, shield, etc.

Yep - then you'll know where to stick it into to be able to stick it in and fire it up