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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: The vertical 312 on the side of the tubes is the giveaway..... posted by JimL on January 20, 2006 at 15:10:14:
Yes, that's a must-have book. Here's some overlapping info from the Triode site on the codes: http://www.triodeel.com/eiacode.htmThey weren't just military, used pretty universally on tubes at least in N. America. Can get a little tricky on occasion, though, because sometimes the rebranding company puts their own EIA/RMA code on, rather than the actual manufacturer.
"1022" was used for Mullard in N. America even though I've never seen it on any of the lists, per se. Sometimes discussed elsewhere.
Also, Sylvania was sneaky because they often aligned them vertically, read from top down like here, next to a vertical date code. So looks like three pairs of codes that neve make any sense!
I like to think we could recognize those Baldwins as Sylvanias even w/o the codes.
Old organs can be quite a tube trove!
Jeff
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Follow Ups
- Re: The vertical 312 on the side of the tubes is the giveaway..... - Jeff A W 17:06:20 01/20/06 (1)
- Re: The vertical 312 on the side of the tubes is the giveaway..... - Jeff A W 17:08:52 01/20/06 (0)
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