Quote:
Originally posted by Steve McVoy
Actually, the 621 couldn't have been designed before 1945, since the developmental version of the 6BG6 horizontal output tube wasn't released until late 1945. The cabinet may have been designed earlier.
The 621 and 630 were introduced at the same time, in November of 1946.
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Steve,
Put an 807 beside a 6BG6G and except for the base I'd be hard pressed to tell the difference, except for the box on top of the cathode. Wasn't the 807 used in really early designs before 6BG6's were available? I made a socket adaptor and have actually put an 807 into a socket wanting a 6BG6 in my first Admiral. This was early on in my collecting and I had no stock of 6BG6's. It worked but the 807 didn't seem to have as much gain.
Rob