#31
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Quote:
-Tony |
#32
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Quote:
If this isn't the correct code....I'll have another look at the tube for it. Tony...I tend to agree with you....the cataracts look very much like the kind found in the RCA CRT's. Bob. |
#33
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RCA would be "EIA 274".
I looked at several things I have around and they don't use the word "code", just "EIA 343" for Zenith. (but their CRT's were EIA 1101 for the (Rauland division), Zenith company. CRT's, tubes, modules and some other parts usually had the EIA code on them. In the 60's it seemed like a lot of parts were shared. Some receiving tubes in Zenith would have "Zenith" printed on them but the EIA 274 would tell you it was a RCA tube. I think it got to the point that there was no reason for 3 or 4 companies to build the same receiving tube, so one company would build all of 1 type and they would share. With the EIA code you could always tell who was responsible if a problem developed. One of my Zeniths has an original CRT that although labeled "Zenith" was built by Sylvania. I even saw a few new sets come with a crt built by Channel Master. Just curious what went in the DuMont. Here is a partial list of EIA codes someone posted. Tubes and CRT's EIA code Amperex (USA) 111 Bendix 125 DuMont 158 Eimac (Eitel-McCullough, Inc) 162 Electronic Tube Corp 169 General Electric Co (USA) 188 Hytron (CBS-Hytron) 210 Machlett 231 RCA (Radio Corp of America) 274 Raytheon 280 Superior Tube Co 310 Sylvania (Hygrade Sylvania Corp) 312 Tung-Sol 322 United Electronics 323 Western Electric 336 Westinghouse 337 Zenith Radio Corp (CRT's) 343 (Rauland division 1101) Nortn American Philips Corp 423 Taylor (aka Cetron-Taylor) 713 Lewis & Kaufman 738 National Electronics (also Cetron) 749 Penta Laboratories 771 Vacuum Tube Products 781 Varian Associates 809 Litton Industries 879 Electrons, Inc 935
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John of Memphis Currently own 5 working Zeniths Color TV's and one needing repair. PLUS a Zenith Circle of Sound AM-FM radio. Last edited by JohnAdams; 04-21-2009 at 07:08 PM. |
#34
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Sams would include a complete list of EIA codes periodically. Very handy to have. I don't think I've seen a full one online, which seems strange.
That is almost certainly an RCA tube. They were close to being the only volume producer of color crt's at that time. Later DuMont sets did use Sylvania sourced picture tubes.
__________________
Bryan |
#35
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__________________
John Folsom |
Audiokarma |
#36
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And the Winner is.....................Drum Roll......................................
EIA CODE 312 Sylvania (Hygrade Sylvania Corp). Attached is a picture of the code number. I didn't see it the first time around as it was sitting almost directly under the tension spring across the bell of the crt. Thanks for all of that information. I've learned something about EIA codes. Bob. |
#37
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If anyone going to the ETF convention is interested in a DuMont roundie, I'll have one in the auction:
Chuck
__________________
www.myvintagetv.com Learn from the mistakes of others - You can't live long enough to make them all yourself. |
#38
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I'm plenty interested!
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My TV page and YouTube channel Kyocera R-661, Yamaha RX-V2200 National Panasonic SA-5800 Sansui 1000a, 1000, SAX-200, 5050, 9090DB, 881, SR-636, SC-3000, AT-20 Pioneer SX-939, ER-420, SM-B201 Motorola SK77W-2Z tube console McIntosh MC2205, C26 |
#39
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A handsome set-I'm sure it will sell. Is that CTC 10 or 11?
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Bryan |
#40
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To me! MUAHahahahahhahaMUAHhahahahahh!!!........unless the price goes too high.
BTW, is that the chassis for it sitting on the floor?
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My TV page and YouTube channel Kyocera R-661, Yamaha RX-V2200 National Panasonic SA-5800 Sansui 1000a, 1000, SAX-200, 5050, 9090DB, 881, SR-636, SC-3000, AT-20 Pioneer SX-939, ER-420, SM-B201 Motorola SK77W-2Z tube console McIntosh MC2205, C26 Last edited by zenithfan1; 04-24-2009 at 04:09 PM. |
Audiokarma |
#41
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I think so...that's what they look like. Sits upright right behind the control panel.
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Bryan |
#42
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Yes, that's the chassis beside the cabinet. I'm picking up the set tomorrow and I'll try to post a better picture when I get it home.
Chuck
__________________
www.myvintagetv.com Learn from the mistakes of others - You can't live long enough to make them all yourself. |
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