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Old 9th November 2010, 06:11 PM   #1
misov is offline misov  Belarus
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Default 7W7 tube - how it competes with other pentodes as driver?

I've read in Pete Millett's description of his 307A Push-Pull Amp
some good words on 7W7 pentode. Can somebody compare it
to some more well known pentodes of similar specs (not only
cheap ones) as driver tube both in pentode and triode modes?
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Old 20th April 2012, 10:32 PM   #2
aldovan is offline aldovan  Brazil
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Join Date: Jul 2005
Location: Curitiba
Default 7w7

Quote:
Originally Posted by misov View Post
I've read in Pete Millett's description of his 307A Push-Pull Amp
some good words on 7W7 pentode. Can somebody compare it
to some more well known pentodes of similar specs (not only
cheap ones) as driver tube both in pentode and triode modes?
My friend, I get a lot of this tubes for make experiences in the next months...
You test it in triode mode ?

Aldovan
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Old 21st April 2012, 05:43 AM   #3
misov is offline misov  Belarus
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No I did not test it yet.
I found interesting info in old book: "...7V7, 7W7, and 14W7 are actually
hexodes, but since g2 and g3 are internally connected and function as a
single screen grid they are usually considered as pentodes".
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Old 17th August 2013, 12:07 AM   #4
aldovan is offline aldovan  Brazil
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Join Date: Jul 2005
Location: Curitiba
Default 7w7 is fine

Quote:
Originally Posted by misov View Post
No I did not test it yet.
I found interesting info in old book: "...7V7, 7W7, and 14W7 are actually
hexodes, but since g2 and g3 are internally connected and function as a
single screen grid they are usually considered as pentodes".
My friend

I made some tests with the 7W7 and it work really fine...
Good bass, good definition, is superior in triode mode.
I can post a video in the future.

Aldovan
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Old 17th August 2013, 06:18 AM   #5
misov is offline misov  Belarus
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Thanks for reply!

Could you compare it with some other tubes you tested?
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Old 17th August 2013, 01:35 PM   #6
aldovan is offline aldovan  Brazil
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Join Date: Jul 2005
Location: Curitiba
Default 7W7

Quote:
Originally Posted by misov View Post
Thanks for reply!

Could you compare it with some other tubes you tested?
Yes, I compare with the Tesla E180F and the 7W7 sound the best.
More bass, same refinement in mids and highs, best vocals.

Aldovan
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