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In Reply to: RE: Origin of the 6L6GC posted by Thermionic27609 on July 20, 2013 at 08:50:43:
Confirmation on Texas Instruments' development the 5-layer plate material. Patent applied for in 1959, granted 1963.
US Patent: 3112185
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- RE: Origin of the 6L6GC - Thermionic27609 09:47:07 07/21/13 (0)