E88CC turbo

[revintage]

Anyone found a linear 9-pin double(!)-triode with higher mu and S than E88CC?

[SemperFi]

Not a double, but perhaps a trioded E180F?

[revintage]

Single triodes are no problem, got them all. Must be double.

[SY]

6KN8. Mu is 45, gm is slightly higher (iirc, about 14mmho @ 10 ma).

[revintage]

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.

[dhsettim]

8203?

[dsavitsk]

Originally Posted by revintage

* linear
* 9-pin
* double(!)-triode
* higher mu than E88CC?
* higher S than E88CC?

5 clear criteria

Originally Posted by dhsettim

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!

[SY]

Originally Posted by revintage

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!

[revintage]

Thanks SY!

[Wavebourn]

6F12P (6Ф12П) -- if to triodize a pentode half it is almost identical triode.
Mu=100, S=19 mA/V