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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: Need help to ID this tube ECC83? posted by Andy W on March 18, 2012 at 10:27:07:
The I593 code is representative of 1953 or 1954 production. Its the first ever revision of 12AU7/ECC82 tube made by Mullard in the UK. Most likely produced in the Blackburn factory. There should be a distinct letter-number code present below the I593 either ending with 3 or 4. I can sort of partially make it out. Is it B4? If you can confirm this additional part of the code, I can tell you the month and year of manufacture. Excellent sounding tube. Most that turn up test weak. I believe this tube was only designed for its filament to be series heated by current. More information including some reference photos available at the following website link:
Edits: 03/20/12 03/20/12 03/20/12 03/20/12
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Follow Ups
- Mullard UK manufactured 12AU7/ECC82 tube - XLR8OR 06:15:03 03/20/12 (0)
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