Mic Kaczmarczik's TubeInformation - The Blue Guitar

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From root@henry.henry.net Sun Aug 20 09:53:31 CDT 1995 Article: 126 of rec.audio.tubes 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 From: root@henry.henry.net (root) Newsgroups: rec.audio.tubes Subject: Re: 12AT7 vs. 12AX7? Date: 20 Aug 1995 03:25:32 GMT Organization: University of Iowa, Iowa City, IA, USA Lines: 41 Distribution: world Message-ID: References: NNTP-Posting-Host: red.weeg.uiowa.edu X-Newsreader: TIN [UNIX 1.3 941216BETA PL0] Wilhelm Reich (wilhelm@yakima.wustl.edu) wrote: : Whadda you know about these things? i have the operational specs for both from my copy of (ta-da!) the 1959 ARRL handbook 8-) Well, I've changed the format from a table going across to one going down so I don't have to worry about 80 columns restriction on all this data 8-). Since this is like 10 or 20 pages FINE print, I'm only putting data on those 2 tubes 8-). Type 12AT7 : 12AX7 : Name High-u dual triode (10): High-u Dual Triode :A1 Amp.(10) : Class B Base 9A : 9A Fil or Header : V. 12.6 : 6.3 : 12.6 : 6.3 Amp. 0.15 : 0.3 : 0.15 : 0.3 Capacitances uuf : : C(in) 2.2 (7) : 2.2 (8) : 1.6 (7) : 1.8 (8) C(out) 0.5 (7) : 0.4 (8) : 0.46(7) : 0.34 (8) C(gp) 1.5 (7) : 1.5 (8) : 1.7 (7) : 1.8 (8) Plate Suplly V. 100 : 250 : 250 : 300 Grid Bias 270 (*) : 200 (*) : -2 : 0 Screen Volts --------:-------- : ------------:----------- Screen Ma. --------:-------- : ------------:----------- Plate Ma. 3.7 : 10 : 1.2 : 40 (2) Plate Res. Ohms 15K : 10.9K : 62.5K :----------- Transconductance(11) 4000 : 5500 : 1600 :----------- Amp. Factor(4) 60 : 60 : 100 : 14 (5) Load Res. Ohms --------:-------- : ------------: 16K(6) Watts Output --------:-------- : ------------: 7.5 (*) Cathode resistor ohms (1) Per Plate (2) Maximum-signal current for full-power output. (4) Unless otherwise noted. (5) No signal plate ma. (6) Effective plate-to-plate. (7) Triode No. 1. (8) Triode No. 2. (10) Values for each section. (11) <strong>Mic</strong>roohms. Back to JT30 Home
From wright@uspto.gov Sat Aug 19 20:34:57 CDT 1995 Article: 120 of rec.audio.tubes Path: geraldo.cc.utexas.edu!cs.utexas.edu!news.sprintlink.net!in1.uu.net!intrepid.garcia.com!pioneer.uspto.gov!pioneer.uspto.gov!not-formail From: wright@uspto.gov (Dirk Wright) Newsgroups: rec.audio.tubes Subject: Re: 5751 vs 12AX7 Date: 19 Aug 1995 21:01:20 -0400 Organization: United States Patent and Trademark Office Lines: 13 Message-ID: References: NNTP-Posting-Host: pioneer.uspto.gov X-Newsreader: TIN [version 1.2 PL2] Mark Garvin (mgarvin@panix.com) wrote: : 5751 plate res: 58k transcond: 1200 Mu: 70 : 12AX7 plate res: 62.5k transcond: 1600 Mu: 100 : So why the reputation for being a plug-in replacement? Probably because the lower impedance of the 5751 gave higher bandwidth, or maybe lower distortion at higher frequncies in feedback circuits. Also, the industrial design of the 5751 may have lower microphonics than a garden varity 12AX7. Dirk Back to JT30 Home
Page 1 and 2: Mic Kaczmarczik's Tube Information
Page 3 and 4: Svetlana-6550s 07-Nov-1995 11:01 4k
Page 5: From ftom@netcom.com Sun Mar 26 14:
Page 9 and 10: From tremolux@aol.com Tue Dec 20 11
Page 11 and 12: From hap@bnr.ca Fri Mar 1 16:51:56
Page 13 and 14: : : : What transformer secondary vo
Page 15 and 16: At continuous DC current of 100mA .
Page 17 and 18: From stratboy@onramp.nett Sun Dec 1
Page 19 and 20: From power@wwdc.com Tue Sep 3 09:41
Page 21 and 22: From ashinman@chem.ucalgary.ca Wed
Page 23 and 24: From postmaster@triodeel.com Wed De
Page 25 and 26: From mookie2112@aol.com Sat Jul 31
Page 27 and 28: tubes. Very good in the #2 position
Page 29 and 30: From postmaster@triodeel.com Thu Au
Page 31 and 32: Organization: Univ of CT Health Cen
Page 33 and 34: From raydeeohh@aol.com Mon Jan 30 1
Page 35 and 36: Back to JT30 Home
Page 37 and 38: From power@wwdc.com Mon Jul 29 10:3
Page 39 and 40: From postmaster@triodeel.com Fri Ja
Page 41 and 42: From SRSN81A@prodigy.com Sat Nov 25
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Page 45 and 46: From rongon@bway.net Tue Jul 9 01:0
Page 47 and 48: RCA - Very detailed when clean, sli
Page 49 and 50: From larrysb@aol.comNOspahm Tue Dec
Page 51 and 52: From meo@rru.com Wed Apr 19 14:02:1
Page 53 and 54: From SRSN81A@prodigy.com Sat Aug 19
Page 55 and 56: it!) with a well matched set of GTA
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From tremolux@aol.com Fri May 19 22
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From Kevin@UPSCALEaudio.com Sun Mar
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From robertc908@aol.com Sun Jan 18
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From ebarbour@netcom.com Sun Jun 18
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From tekman@execpc.com Thu Oct 17 1
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From postmaster@triodeel.com Fri Oc
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From dpowers@jeeves.la.utexas.edu T
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From npstewar@eos.ncsu.edu Thu Apr
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Lines: 110 Message-ID: References:
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6: enne-al 9-pin 7 is also a "misce
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From triodeel@ameritech.net Wed Jun
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From ebarbour@netcom.com Sat Aug 26
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From Kevin@UpscaleAudio.com Wed May
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From tremolux@aol.com Sat Oct 1 00:
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it beefier magnetics and they can h
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little gift of a bad trace, a bad L
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From svetengr@aol.com Fri Mar 7 22:
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From dhaugen9@mail.idt.net Fri Oct
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with the numbers on top in a grey p
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From: jatwood@netcom.com (John Atwo
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Back to JT30 Home
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From jjensen@sirius.com Wed Apr 30
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(2) When the Chinese tried making 6
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Many of Mazda's later tubes were ma
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From Dr.Distortion@bbs.mhv.net Wed
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From jjensen@sirius.com Fri May 2 1
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From tomhiwatt@aol.com Thu Nov 21 1
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From postmaster@triodeel.com Sun Au
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From Teleologist@Sorry.NoEmail Thu
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lack paint. This is a good case for
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coupling in airborne sound to the t
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UPSCALE Audio/Home Theater/Rare Tub
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From stanj@dnai.com Sun Nov 19 10:5
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From jcassidy@svetlana.com Thu Oct
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small, so it could have been plain
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From larrysb@aol.com Sat Aug 31 09:
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From lewis@jpmorgan.com Wed Apr 17
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4. The first grid voltage -35 V 5.
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From PYLOT@asu.edu Tue Sep 19 11:35
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From grego@mud.lattice.com Thu Feb
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or control grid is sloppy. As you k
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From ep@interport.net Fri Jul 28 15
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From PYLOT@asu.edu Tue Aug 8 11:34:
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From postmaster@triodeel.com Sat Oc
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From idkwid@mail.smart.net Tue Nov
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From larrysb@aol.com Sat Oct 26 00:
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From larrysb@aol.com Thu May 16 10:
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From tremolux@aol.com Sun Oct 16 09
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From postmaster@triodeel.com Wed Fe
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From joelnice@diva.EECS.Berkeley.ED
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Subject: Re: Tomorrow's tubes? Send
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From mcjimi@aol.com Fri May 12 12:4
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mirrors. Or try: "It is also availa
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8. Output transformer questions: >
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potential and plate potential, tran
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> A recently voiced although intuit
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* "rewinding transformers with CAD"
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From triodeel@interserv.com Wed Apr
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Best Regards, Kevin Deal High End,
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From bry@REMOVETHIS.mnsinc.com Sat
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From keen@austin.ibm.com Thu Mar 21
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Sovtek also markets 5U4G, 5Y3GT, 6S
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From rcsigurd@mm.com Tue Dec 17 15:
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The two, three, and four digit indu
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AEG/Telefunken themselves aren't ab
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From ftom@netcom.com Mon Jun 26 21:
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By incorporating a tube rectifier i
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+++ +++ +++ -+---+---+---+---+---+-
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From keen@austin.ibm.com Sat Aug 13
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splitter in many hifi amps, lots of
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Here's the tough one: Why hasn't an
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The price for matched pairs/quads i
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which case you use unscew and remov
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From ebarbour@netcom.com Fri Sep 1
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From triodeel@interserv.com Fri May
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Ned Carlson Triode Electronics 2225
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From postmaster@triodeel.com Tue Ma
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From dawsondc@postoffice.worldnet.a
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After that, people wanted radios in
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I was given one answer which I thin
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From postmaster@triodeel.com Sat Se
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Mic Kaczmarczik's TubeInformation - The Blue Guitar

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