ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.

ampage archive

Vintage threads from the first ten years

Telefunken 12AX7 tubes...

:

10/28/1999 12:45 PM
Fj	Telefunken 12AX7 tubes... I got a handful of these grey-plate Tele's at a flea market t-day...are these pre-amp tubes good in "HI-GAIN" type amp curcuits...or...are they better suited in "clean" HI-FI amps?...Frank...also came across a MADE IN JAPAN 5AR4/GZ-34...how are these rectifier tubes rated?

10/28/1999 12:51 PM
Whit	FJ, From what I've heard, those Telefunkens have a slightly lower mu than a normal American 12AX7, and are prized by the hifi set. I'd certainly plug 'em into your favourite amp and see how you like 'em. Good score... ... Whit

10/28/1999 4:43 PM
John Stokes	There's two types of Telefunkens. Flat-plate and ribbed-plate. Which one you get? FWIW, the flat-plate versions have a bit more "snob appeal", and have gain as high as just about anything else. The Japanese 5AR4 is probably a copy of the old Mullard. They're very good.

10/28/1999 6:19 PM
Jim S.	Beware -- I've seen a Japanese tube labeled 5AR4/GZ34 that was really only a 5Y3. I think it was rebranded as "National".

10/28/1999 11:24 PM
Fj	this 1 has a "dimple" on top

10/28/1999 11:24 PM
Fj	oh...btw...dimple = raytheon gz-34

10/28/1999 11:23 PM
Fj	these have a grey flat plate...came out of a SCOTT STEREO MASTER "LK-72-8"...real nice OT iron! X2!...as well

Page 1 of 3