Alpha 12AX7 tubes...anyone know about these?

[clay49]

I have a collection of preamp tubes I took out of several amps over the last few years, and I have this one that is labeled "Alpha" and also has "Made In Germany." It appears to be NOS, but I have no idea.

Can anyone tell me about these? When manufactured, sound characteristics, etc?

Thanks!

http://i34.photobucket.com/albums/d127/clay49/Alphatube1.jpg

http://i34.photobucket.com/albums/d127/clay49/Alphatube2.jpg

[teefus]

a detailed pic would help. there are identifying marks and codes on most vintage tubes and the parts can be clues too.

[Timbre Wolf]

I'm not familiar with the Alpha brand, but it is not the manufacturer's name. A photo would help, along with any codes you see.

- T

[clay49]

a detailed pic would help. there are identifying marks and codes on most vintage tubes and the parts can be clues too.

Done!

[Timbre Wolf]

RFT ECC83, made in East Germany.


Sound: early breakup, somewhat rolled-off treble, low relative clarity; coveted by many for overdrive in overly-bright amps

- Thom

[clay49]

RFT ECC83, made in East Germany.

- Thom

You are TOO GOOD, Thom! Thanks!

[Timbre Wolf]

Thanks!

:beer

- T