On September 10, 2014 at 20:20, Ernie Gilman said...
Anything that vintage guys get nostalgic about.
Those all have octal bases. When I spoke of four pin, five pin, and six pin tubes such as the 80, 35 and 37, I was talking of tubes without the octal base... with ONLY those pins sticking down. The fatter filament pins were the only way you could be sure you weren't sticking them in rotated from the proper position, and a strong arm could get them in wrong.
I had them and I was familiar with them. I only have the Sylvania one today.
I gave up on it around 1969. And again, the basic circuits weren't the problem. The problem was stability of the tuned RF stages, big-ass triode tubes amplifying over the range 540 kc to 1600 kc. (We didn't have Hertzes back then.)
Then, there's the good old 83 rectifier, with mercury vapor.
Oh, I was counting pins, not thinking about the base, itself.
Oh, we had Hertzes, we just kept them tucked away for special occasions. Kind of like the way some people ignored the Metric System in the late-'60s and early '70s. DOH!
