Mic Kaczmarczik's TubeInformation - The Blue Guitar

More documents

Recommendations

Info

products, still making tubes using some old Philips production tooling and equipment. Types in production: 6CA7, 6CG7, 12AT7, 12AX7, 12BH7, 12DW7, EL34, EL519, PL519, KT90, KT99, EL84, EL86, possibly a few others. UKRAINE: Poljaron, Lvov: Makes 833A and some Russian power types, plus related products such as vacuum capacitors. USA: Richardson Electronics, LaFox, IL: Makes large power tubes and specialized types. Also makes a 300B, 845 and 50 sold under the Cetron brand, as well as a KT88 sold under the National brand. Richardson has large quantities of tooling obtained from old American tube factories when they shut down. Also makes some larger transmitting and HV types. Westrex Corporation, Kansas City MO (alleged): Makes the reissued Western Electric 300B. Claims to be developing a KT88, 212E, 274A and other old WE types for future manufacture. Company office is in Atlanta, GA. This firm is independent of AT&T Corporation and has licensed the brandnames from AT&T. MU, Oceanside, CA: Small contract factory, makes occasional runs of unusual glass and metal-ceramic tubes for military use. Still makes some of the old "Bendix Red Bank" tubes, such as the 6094 and 6384, in occasional lots. Fritztronics, Randolph MA: Rebuilds klystrons and other large power tubes. Claimed to be in a cooperative agreement with Groove Tubes to manufacture an exact copy of the original RCA "black plate" 6L6GC. Triton Services ETD, Gaithersburg MD: Makes some Eimac and Litton glass power types, using equipment >from the original manufacturers. Back to JT30 Home
From rcsigurd@mm.com Tue Dec 17 15:46:25 CST 1996 Article: 20311 of rec.audio.tubes Path: geraldo.cc.utexas.edu!cs.utexas.edu!howland.erols.net!www.nntp.primenet.com!nntp.primenet.com!visi.com!mr.net!news.mr.net!204.73.34.145 From: rcsigurd@mm.com (Richard Sigurdson) Newsgroups: rec.audio.tubes Subject: Re: tube manufacturer codes? Date: Tue, 17 Dec 1996 20:23:26 GMT Organization: Minnesota Regional Network (MRNet) Lines: 43 Message-ID: References: NNTP-Posting-Host: vortex.mm.com X-Newsreader: Forte Free Agent 1.0.82 Gordon Trump wrote: >Many years (25+) ago when I serviced consumer and pro audio and video gear, >the tubes we bought for replacement use all had a 3-digit code on the side. >"274" was RCA and "312" was Sylvania and "337" was Zenith? This code > Does anyone have a list of these codes? <strong>The</strong>y ocasionally also >appeared on other parts- like transformers, etc. >-- >Gordon O. Trump Sales Engineer >Red Rose Communications >717.738.8441 voice 717.738.7030 fax Gordon, In the early 70's I was a tech at a local Sylvania TV distributor and had a book published by the EIA (trade association of domestic OEMs) which had a list of numbers followed by the vendor. I wish I had a copy of that book today. <strong>The</strong> numbers you have listed are correct. Other OEMs are GE -188 , Westinghouse-337, Tung-Sol-322, Raytheon-280. GE put 188 on tubes they made and labeled GE but RCA did not put 274 on RCA branded tubes, but 274 was found on tubes they made for other OEMs including Sylvania and GE. Zenith didn't make their own receiving tubes but did have a CRT plant ( Rauland) and put the Rauland number on those tubes. Sylvania made the majority of small tubes for Zenith, and I believe they designed tubes for their specific needs. Motorola, Admiral, and other smaller manufacturers bought tubes from who ever made tubes that fit their specs. Those tubes had the set name (Motorola, etc,) labeled, along with the EIA code stamped on the tube, along with a date code, such as 6812, meaning the tube was made in 1968, 12th week. Picture tube date codes were usually 2 years (color) or 1 year (b&w) from the date of manufacture which indicated the end the warranty period. With the majority of components for home entertainment product being made off-shore, most of them don't have EIA numbers. I have seen currently made CRTs with familiar 312 and 274 numbers on them though. Richard Sigurdson Sr. Eng. Tech. KMSP-TV/UPN9-Mpls/St. Paul rcsigurd@mm.com 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 and 6:
From ftom@netcom.com Sun Mar 26 14:
Page 7 and 8:
From wright@uspto.gov Sat Aug 19 20
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
Page 43 and 44:
From postmaster@triodeel.com Sun No
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
Page 57 and 58:
From tremolux@aol.com Fri May 19 22
Page 59 and 60:
From Kevin@UPSCALEaudio.com Sun Mar
Page 61 and 62:
From robertc908@aol.com Sun Jan 18
Page 63 and 64:
From ebarbour@netcom.com Sun Jun 18
Page 65 and 66:
From tekman@execpc.com Thu Oct 17 1
Page 67 and 68:
From postmaster@triodeel.com Fri Oc
Page 69 and 70:
From dpowers@jeeves.la.utexas.edu T
Page 71 and 72:
From npstewar@eos.ncsu.edu Thu Apr
Page 73 and 74:
Lines: 110 Message-ID: References:
Page 75 and 76:
6: enne-al 9-pin 7 is also a "misce
Page 77 and 78:
From triodeel@ameritech.net Wed Jun
Page 79 and 80:
From ebarbour@netcom.com Sat Aug 26
Page 81 and 82:
From Kevin@UpscaleAudio.com Wed May
Page 83 and 84:
From tremolux@aol.com Sat Oct 1 00:
Page 85 and 86:
it beefier magnetics and they can h
Page 87 and 88:
little gift of a bad trace, a bad L
Page 89 and 90:
From svetengr@aol.com Fri Mar 7 22:
Page 91 and 92:
From dhaugen9@mail.idt.net Fri Oct
Page 93 and 94:
with the numbers on top in a grey p
Page 95 and 96:
From: jatwood@netcom.com (John Atwo
Page 97 and 98:
Back to JT30 Home
Page 99 and 100:
From jjensen@sirius.com Wed Apr 30
Page 101 and 102:
(2) When the Chinese tried making 6
Page 103 and 104:
Many of Mazda's later tubes were ma
Page 105 and 106:
From Dr.Distortion@bbs.mhv.net Wed
Page 107 and 108:
From jjensen@sirius.com Fri May 2 1
Page 109 and 110:
From tomhiwatt@aol.com Thu Nov 21 1
Page 111 and 112:
From postmaster@triodeel.com Sun Au
Page 113 and 114:
From Teleologist@Sorry.NoEmail Thu
Page 115 and 116:
lack paint. This is a good case for
Page 117 and 118:
coupling in airborne sound to the t
Page 119 and 120:
UPSCALE Audio/Home Theater/Rare Tub
Page 121 and 122:
From stanj@dnai.com Sun Nov 19 10:5
Page 123 and 124:
From jcassidy@svetlana.com Thu Oct
Page 125 and 126:
small, so it could have been plain
Page 127 and 128:
From larrysb@aol.com Sat Aug 31 09:
Page 129 and 130: From lewis@jpmorgan.com Wed Apr 17
Page 131 and 132: 4. The first grid voltage -35 V 5.
Page 133 and 134: From PYLOT@asu.edu Tue Sep 19 11:35
Page 135 and 136: From grego@mud.lattice.com Thu Feb
Page 137 and 138: or control grid is sloppy. As you k
Page 139 and 140: From ep@interport.net Fri Jul 28 15
Page 141 and 142: From PYLOT@asu.edu Tue Aug 8 11:34:
Page 143 and 144: From postmaster@triodeel.com Sat Oc
Page 145 and 146: From idkwid@mail.smart.net Tue Nov
Page 147 and 148: From larrysb@aol.com Sat Oct 26 00:
Page 149 and 150: From larrysb@aol.com Thu May 16 10:
Page 151 and 152: From tremolux@aol.com Sun Oct 16 09
Page 153 and 154: From postmaster@triodeel.com Wed Fe
Page 155 and 156: From joelnice@diva.EECS.Berkeley.ED
Page 157 and 158: Subject: Re: Tomorrow's tubes? Send
Page 159 and 160: From mcjimi@aol.com Fri May 12 12:4
Page 161 and 162: mirrors. Or try: "It is also availa
Page 163 and 164: 8. Output transformer questions: >
Page 165 and 166: potential and plate potential, tran
Page 167 and 168: > A recently voiced although intuit
Page 169 and 170: * "rewinding transformers with CAD"
Page 171 and 172: From triodeel@interserv.com Wed Apr
Page 173 and 174: Best Regards, Kevin Deal High End,
Page 175 and 176: From bry@REMOVETHIS.mnsinc.com Sat
Page 177 and 178: From keen@austin.ibm.com Thu Mar 21
Page 179: Sovtek also markets 5U4G, 5Y3GT, 6S
Page 183 and 184: The two, three, and four digit indu
Page 185 and 186: AEG/Telefunken themselves aren't ab
Page 187 and 188: From ftom@netcom.com Mon Jun 26 21:
Page 189 and 190: By incorporating a tube rectifier i
Page 191 and 192: +++ +++ +++ -+---+---+---+---+---+-
Page 193 and 194: From keen@austin.ibm.com Sat Aug 13
Page 195 and 196: splitter in many hifi amps, lots of
Page 197 and 198: Here's the tough one: Why hasn't an
Page 199 and 200: The price for matched pairs/quads i
Page 201 and 202: which case you use unscew and remov
Page 203 and 204: From ebarbour@netcom.com Fri Sep 1
Page 205 and 206: From triodeel@interserv.com Fri May
Page 207 and 208: Ned Carlson Triode Electronics 2225
Page 209 and 210: From postmaster@triodeel.com Tue Ma
Page 211 and 212: From dawsondc@postoffice.worldnet.a
Page 213 and 214: After that, people wanted radios in
Page 215 and 216: I was given one answer which I thin
Page 217 and 218: From postmaster@triodeel.com Sat Se
show all

Mic Kaczmarczik's TubeInformation - The Blue Guitar

Create successful ePaper yourself

Delete template?

Save as template?