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Old 17th June 2010, 04:45 AM   #1
Bigun is offline Bigun  Canada
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Default 7236 vs 6AS7 ?

I understand that the 7236 can substitute for the 6AS7 and provide a higher mu.

Is the 7326 available or one of those silly-priced tubes ?

How does the 7326 compare with 6AS7 for linearity (under similar conditions) ?

Anybody want to comment on the sound of the 7326 vs 6AS7 ?
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Old 17th June 2010, 12:01 PM   #2
jlsem is offline jlsem  United States
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It's more expensive than the 6AS7, but it can be had for reasonable prices on eBay. The Tungsol version is a triode connected two-grid tube and can stand higher plate voltages than the 6AS7 or the 5998. The 7236 is a computer rated 5998.

I can't comment on the sound compared to the 6AS7, but my little 7236 stereo amp seems to have low distortion, although I've never measured it.

John

Last edited by jlsem; 17th June 2010 at 12:03 PM.
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Old 17th June 2010, 01:26 PM   #3
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Very interesting specks! I might have to try a pair
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Old 17th June 2010, 02:20 PM   #4
Cassiel is offline Cassiel  Libya
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Quote:
Originally Posted by SemperFi View Post
Very interesting specks! I might have to try a pair
A good regulator tube for audio. Maybe in that part of the world you could find cheap ones, they're expensive here.

http://www.mif.pg.gda.pl/homepages/f...115/6/6528.pdf
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Old 17th June 2010, 02:23 PM   #5
SigFire is offline SigFire  Germany
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Hello,
...since Pete Millett used 6AS7 and the likes in his Wheatfield-HA-2 headphone amp, you may find some informations here:
Wheatfield
and more specific there:
http://www.pmillett.com/Wheatfield/rolling.pdf


Greez

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Old 17th June 2010, 04:06 PM   #6
Bigun is offline Bigun  Canada
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Quote:
Originally Posted by SigFire View Post
Hello,
...since Pete Millett used 6AS7 and the likes in his Wheatfield-HA-2 headphone amp, you may find some informations here:
Wheatfield
and more specific there:
http://www.pmillett.com/Wheatfield/rolling.pdf


Greez

SigFire
I can't get this link to load ?

The 6528 is a 6AS7 on steroids, eats up 5A of heater current

No takers on the sound of the 7326 ?
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Old 17th June 2010, 05:11 PM   #7
Cassiel is offline Cassiel  Libya
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http://www.pmillett.com/Wheatfield/rolling.pdf

He says he tried 6080, 6AS7, 6336, 7236, 6528 and 5998. 7236 was the winner.
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Old 17th June 2010, 05:23 PM   #8
Bigun is offline Bigun  Canada
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Thanks - it turns out my browser just can't see that file, I switched to another browser and downloaded it without problem.
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Old 17th June 2010, 08:05 PM   #9
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One thing to beware of: the 7236 does not have very good heater-to-cathode insulation, unlike most of the regulator tubes (6AS7, 6080, 5998, 6528). I've had some break down at 150V.

Parametrically the 7236 is very much like the 5998. It was actually designed to drive the spindle motors of computer tape drives!

Pete
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Old 17th June 2010, 09:52 PM   #10
Bigun is offline Bigun  Canada
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Ok, then I'm going to try one of those 7236's in my cellini amp (have to build it first though).

I'd love to try a 421A too, but they are going for silly prices and half of them look like duds.
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