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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: RE: Tung Sol 010309 posted by Joe Appierto on February 3, 2016 at 11:09:55:
I wasn't saying much - it's just a photo and some thoughts on this particular batch of TS 6550's.There's some historical merit to them. The "010309" designation for a Tung Sol 6550, as far as I have seen, is entirely unique to Fender's 400PS amplifier, produced between '70-75. The schematic says the 010309 is a "special design and selected 6550".
I think there are two possibilities. For one, it's exactly as the schematic mentioned: it's a cherry-picked 6550. Given the temperamental quality of the 400PS, this seems reasonable.
Or, it's a formality. Tung Sol was merged with Wagner Electric in 1967, sold to Studebaker, which then merged into Studebaker-Worthington, which later transformed into McGraw-Edison after a full acquisition in 1979. Given all this changing of hands, the patent for the 6550 may have been in limbo after 1967, necessitating the temporary 010309 by 1970 for the release of the 400PS. For all intensive purposes, they're the same tube, but the 010309 doesn't infringe on any patents (especially when no datasheet seems to exist for it). If patent woes and limbo orders were an issue, the 010309 would have a tactful bureaucratic solution.
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May your tubes be lively, warm, and long-lasting. Holy be thy heater.
Edits: 02/03/16
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Follow Ups
- RE: Tung Sol 010309 - TubeAcolyte 13:52:25 02/03/16 (5)
- Special selected TS 6550 for the Fender 400PS - FenderLover 17:33:07 02/03/16 (4)
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