Re: 12SX7's

OTL Asylum

OTL, Output Transformerless Amplifier User Group.

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In Reply to: Re: 12SX7's posted by Lew on October 26, 1999 at 08:08:34:

LEW: MOST OF THE RCAS THAT I HAVE TESTED SEEM PRETTY CONSISTANT.THE GM WAS KINDA LOW BUT THE PLATE CURRENT MATCHED UP FAIRLY CLOSE.

SOME THAT HAD PRETTY HIGH GM,THE SECTIONS WERE
MISMATCHED. OH WELL, CAN'T HAVE EVERYTHING ! THEY
DO SOUND VERY GOOD, EVEN THE ONES THAT DID NOT SPEC OUT. THE SPECS THAT IM GETTING ARE ABOUT 1.8
TO 2.O ON THE GM AND ABOUT 5 TO 6 ON THE PLATE
CURRENT. HOWEVER, IM USING A TRIPLETT 3444 AND I
REALLY DONT KNOW HOW ACCURATE IT IS. I HAVE NEVER
HAD IT CALIBRATED. ARE THESE ABOUT THE SAME READINGS THAT YOU ARE GETTING ? BTW- HOW ABOUT RECTIFYING THE FILAMENTS ON THESE SUCKERS? IF SO
WHAT VALUE CAP WOULD YOU USE ? REGARDING THE GE TALLS, DIDNT HAVE ENOUGH OF THEM TO REALLY KNOW
HOW THEY AVERAGED OUT. I ONLY HAD ABOUT 10 OF THEM. BUT OUT OF TEN ONLY 50% WERE DECENT AND OF
THE FIVE THAT WERE DECENT ONLY 2 OR 3 OF THEM THE
SECTIONS MATCHED.

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Follow Ups Full Thread

Topic - MESSAGE FOR MARK GILMORE: RE HOOKUP WIRE & RECTIFING THE AC DRIVER FILAMENTS - P. BERNARD 14:20:32 10/24/99 (7)

Re: MESSAGE FOR MARK GILMORE: RE HOOKUP WIRE & RECTIFING THE AC DRIVER FILAMENTS - mark 18:16:41 10/24/99 (6)

12SX7's - Dan 08:07:40 10/25/99 (5)

Re: 12SX7's - Lew Markoff 08:37:58 10/25/99 (4)

Re: 12SX7's - mark 10:20:40 10/25/99 (3)

Re: 12SX7's - P. BERNARD 16:20:14 10/25/99 (2)

Re: 12SX7's - Lew 08:08:34 10/26/99 (0)

Re: 12SX7's - P. BERNARD 13:33:51 10/26/99 (1)

Re: 12SX7's - P. BERNARD 18:58:16 10/25/99 (0)

Follow Ups

Re: 12SX7's - P. BERNARD 13:33:51 10/26/99 (1)