Mic Kaczmarczik's TubeInformation - The Blue Guitar
Mic Kaczmarczik's TubeInformation - The Blue Guitar
Mic Kaczmarczik's TubeInformation - The Blue Guitar
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From root@henry.henry.net Sun Aug 20 09:53:31 CDT 1995<br />
Article: 126 of rec.audio.tubes<br />
Path: geraldo.cc.utexas.edu!cs.utexas.edu!swrinde!tank.news.pipex.net!pipex!in2.uu.net!news.uiowa.edu!henry.henry.net!not-for-mail<br />
From: root@henry.henry.net (root)<br />
Newsgroups: rec.audio.tubes<br />
Subject: Re: 12AT7 vs. 12AX7?<br />
Date: 20 Aug 1995 03:25:32 GMT<br />
Organization: University of Iowa, Iowa City, IA, USA<br />
Lines: 41<br />
Distribution: world<br />
Message-ID: <br />
References: <br />
NNTP-Posting-Host: red.weeg.uiowa.edu<br />
X-Newsreader: TIN [UNIX 1.3 941216BETA PL0]<br />
Wilhelm Reich (wilhelm@yakima.wustl.edu) wrote:<br />
: Whadda you know about these things?<br />
i have the operational specs for both from my copy of (ta-da!) the 1959<br />
ARRL handbook 8-)<br />
Well, I've changed the format from a table going across to one going<br />
down so I don't have to worry about 80 columns restriction on all this data<br />
8-). Since this is like 10 or 20 pages FINE print, I'm only putting data on<br />
those 2 tubes 8-).<br />
Type 12AT7 : 12AX7<br />
:<br />
Name High-u dual triode (10): High-u Dual Triode<br />
:A1 Amp.(10) : Class B<br />
Base 9A : 9A<br />
Fil or Header :<br />
V. 12.6 : 6.3 : 12.6 : 6.3<br />
Amp. 0.15 : 0.3 : 0.15 : 0.3<br />
Capacitances uuf : :<br />
C(in) 2.2 (7) : 2.2 (8) : 1.6 (7) : 1.8 (8)<br />
C(out) 0.5 (7) : 0.4 (8) : 0.46(7) : 0.34 (8)<br />
C(gp) 1.5 (7) : 1.5 (8) : 1.7 (7) : 1.8 (8)<br />
Plate Suplly V. 100 : 250 : 250 : 300<br />
Grid Bias 270 (*) : 200 (*) : -2 : 0<br />
Screen Volts --------:-------- : ------------:-----------<br />
Screen Ma. --------:-------- : ------------:-----------<br />
Plate Ma. 3.7 : 10 : 1.2 : 40 (2)<br />
Plate Res. Ohms 15K : 10.9K : 62.5K :-----------<br />
Transconductance(11) 4000 : 5500 : 1600 :-----------<br />
Amp. Factor(4) 60 : 60 : 100 : 14 (5)<br />
Load Res. Ohms --------:-------- : ------------: 16K(6)<br />
Watts Output --------:-------- : ------------: 7.5<br />
(*) Cathode resistor ohms<br />
(1) Per Plate<br />
(2) Maximum-signal current for full-power output.<br />
(4) Unless otherwise noted.<br />
(5) No signal plate ma.<br />
(6) Effective plate-to-plate.<br />
(7) Triode No. 1.<br />
(8) Triode No. 2.<br />
(10) Values for each section.<br />
(11) <strong>Mic</strong>roohms.<br />
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