S11E12 tube, a KT88 with more gain - ever hear of it???

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S11E12 tube, a KT88 with more gain - ever hear of it???

Postby Unit_1 on Sun Feb 07, 2016 7:26 am

In my daily perusal of everything tube, I came upon some of these. Anyone ever use these in a guitar amp? Sound like they would be killer sounding and L-O-U-D

STC Blue logo – UK NOS. UK [CV4060] with STC logo. Audio type with octal base. Photo http://www.tave.co.uk 1. . THE PINOUT OF THE KT88 AND S11E12 is identical therefore no wiring changes are required 2. Due to higher gain of S11E12 it will be necessary to increase the bias to the valve. To achieve similar standing current, bias will need to be about -40V. An alternative solution is to reduce anode voltage by about 50V. This is achieved by adding a decoupling R/C network in the HT feed to the output transformer. 3. When set up correctly the S11E12 gives good base drive and excellent transient response. As the valve has lower output impedance than a KT88, it’s dynamic performance will be a noticeable improvement in the adjusted circuit. For further information, please refer to KT88 and S11E12 data sheets available on this website. Data and curves at http://tubedata.itchurch.org/sheetsS.html More data http://www.r-type.org/exhib/aad0008.htm


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Re: S11E12 tube, a KT88 with more gain - ever hear of it???

Postby OldSchoolDave on Sun Feb 07, 2016 5:25 pm

Never heard of them :? . That said, I've also never found a KT88 to be lacking on power or dynamic performance.

The bottle looks smaller than a KT88, for whatever that's worth. And, the phrase "the valve has lower output impedance than a KT88" makes me wonder how a vintage output transformer might react to them.

Are they a bargain?

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Re: S11E12 tube, a KT88 with more gain - ever hear of it???

Postby pdf64 on Sun Feb 07, 2016 7:26 pm

The limiting screen grid voltage of 300V and plate dissipation of 28 watts may be a problem.
I think it may be stretching things rather to market them as compatible with / equivalent to, KT88; unless they're offering a very good warranty.
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Re: S11E12 tube, a KT88 with more gain - ever hear of it???

Postby Unit_1 on Sun Feb 07, 2016 8:57 pm

Well, yeah a pretty good deal compared to NOS KT88, but 300v?

Yikes! Somehow glossed over that!!! Thanks pdf!!!

It's these dry, hot north winds blowing for the past 8 days without let up, they are beating the crud out of me, and they say it's going to be another 8 days before they change. Been taking sudafeds like candy!!!! :popcorn: (or popcorn)

oui.....
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