The History of the EL-34 and other Pentodes and Beam Tetrodes. - diyAudio
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Old 29th May 2012, 11:36 PM   #1
nazaroo is offline nazaroo  Canada
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Arrow The History of the EL-34 and other Pentodes and Beam Tetrodes.

Well, I don't know any history concerning the development and manufacture of pentodes and tetrodes,
but I'm sure dozens of experts here will be able to jump in and fill the gap.

Enjoy!

Last edited by nazaroo; 29th May 2012 at 11:41 PM.
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Old 30th May 2012, 12:05 AM   #2
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Geez, what did you expect?, you got the history wrong on the EL84, one of the most common tubes out there.

Some commons substitutions for the EL84 are the Russian 6P14P, 7189 and 6GK6 (Different pinout.)
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Old 30th May 2012, 12:13 AM   #3
nazaroo is offline nazaroo  Canada
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Dang, I meant the 300b. How did I screw that up?

What I meant to say was not that the Enterprise was a garbage scow,
but that it should be hauled away AS garbage.

Now lets see a real Star Trek Barfight!
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Old 30th May 2012, 12:17 AM   #4
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The 6L6 was the first beam power tube. Developed in the 1930's. I used to have the article that described the development of that tube. The article doesn't appear to be online.
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Old 30th May 2012, 12:26 AM   #5
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Old 30th May 2012, 01:22 AM   #6
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Old 30th May 2012, 01:38 AM   #7
kevinkr is offline kevinkr  United States
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Oddly enough wikipedia has a pretty good write up on the history of the 6L6 here: 6L6 - Wikipedia, the free encyclopedia
worth a read..
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Old 30th May 2012, 01:43 AM   #8
kevinkr is offline kevinkr  United States
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Quote:
Originally Posted by nazaroo View Post
Dang, I meant the 300b. How did I screw that up?

What I meant to say was not that the Enterprise was a garbage scow,
but that it should be hauled away AS garbage.

Now lets see a real Star Trek Barfight!
I'd take the bait having lived with 300Bs for nearly 20yrs, but I find I actually like the GM70 better. Both are quite linear properly employed, and I've even relegated a few bad 300B to the garbage scow, err garbage over the years. Sorry..
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Old 30th May 2012, 01:57 AM   #9
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Quote:
The 6L6 was the first beam power tube. Developed in the 1930's.
Correct. From the day RCA introduced it, some variant of the the type has been continuously in production. No other active device can match that record.
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Old 30th May 2012, 05:19 AM   #10
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Quote:
Originally Posted by dirkwright View Post
The 6L6 was the first beam power tube. Developed in the 1930's. I used to have the article that described the development of that tube. The article doesn't appear to be online.
6L6 was introduced in July 1936. But what about 41 that was used back in 1931? Was it pentode?
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