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Old 29th July 2010, 12:45 PM   #1
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Default E88CC turbo

Anyone found a linear 9-pin double(!)-triode with higher mu and S than E88CC?
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Old 29th July 2010, 12:50 PM   #2
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Not a double, but perhaps a trioded E180F?
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Old 29th July 2010, 12:51 PM   #3
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Single triodes are no problem, got them all. Must be double.
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Old 29th July 2010, 12:59 PM   #4
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6KN8. Mu is 45, gm is slightly higher (iirc, about 14mmho @ 10 ma).
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Old 29th July 2010, 01:43 PM   #5
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That one seems interesting. Too bad there are no datasheets or curves available. Maybe you measured one?

Quite expensive though. Cheapest NOS I could find was 16,50 USD.

Someone mentioned russian 6S4 as a singletriode equivalent.

Last edited by revintage; 29th July 2010 at 01:47 PM.
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Old 29th July 2010, 08:49 PM   #6
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Default super 88

8203?
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Old 29th July 2010, 09:37 PM   #7
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Quote:
Originally Posted by revintage View Post
* linear
* 9-pin
* double(!)-triode
* higher mu than E88CC?
* higher S than E88CC?
5 clear criteria

Quote:
Originally Posted by dhsettim View Post
8203?
The 8203is
- not very linear
- not a 9 pin
- not a double triode

and it has

- mu between 30 and 35, as opposed to 33 for the E88CC, and
- S that varies from 6,000 to 13,000 as opposed to 10,000 to 15,000 for the E88CC

Otherwise it's perfect!
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Old 29th July 2010, 10:08 PM   #8
SY is offline SY  United States
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Quote:
Originally Posted by revintage View Post
That one seems interesting. Too bad there are no datasheets or curves available. Maybe you measured one?

Quite expensive though. Cheapest NOS I could find was 16,50 USD.
Yes, I have. probably have 15 or 20 of them on hand. I'll check my lab notebook this weekend, but I distinctly remember the distortion being a little higher than a good ECC88 (but MUCH lower than a 6ES8).

These days, $16.50 isn't bad for a tube. I'm about to EBay some EL37, now that I saw what they sell for; my goodness, it's a nice tube, but $200 (what I've seen as the going price) is silly money. I can buy 30 "super" 6BG6 for that!
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Old 30th July 2010, 08:32 AM   #9
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Thanks SY!
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Old 30th July 2010, 08:54 AM   #10
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6F12P (6Ф12П) -- if to triodize a pentode half it is almost identical triode.
Mu=100, S=19 mA/V
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Last edited by Wavebourn; 30th July 2010 at 09:04 AM.
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