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In Reply to: 6GM5 tubes posted by Spantou on March 27, 2021 at 12:59:23:
Hi Spantou 6GM5 is electrically equivalent to 7591 with button 9-pin out - 9MQ base. It fits the same socket as 12AX7. The exhaust tip is on the top of the tube.
7868 is electrically equivalent to 7591 with novar 9-pin with exhaust tip - 9RW base. This is a larger diameter ring of pins than 9MQ.
7591 is Octal based.
7591 was a Westinghouse developed tube. There is no real equivalent being made today.
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Follow Ups
- RE: 6GM5 tubes - elektron 14:59:35 03/28/21 (4)
- RE: 6GM5 tubes - Spantou 11:47:30 03/29/21 (1)
- RE: 6GM5 tubes - elektron 11:15:23 03/31/21 (0)
- RE: 6GM5 tubes - Spantou 05:48:17 03/29/21 (0)
- RE: 6GM5 tubes - AmadeusMozart 22:19:03 03/28/21 (0)