837 tube for SE Amplifier

[kuka_v]

Have you any idea about this pentod, I mean 837 tubes.
Nothing information at all... I have tryed search here and google too.
I want to make SE amplifies based on this tube.
Can anybody help me with 837's in triod curves? May be you get me your personal opinion about triod mode for this tube.

PS Typical datasheet I already have! I ask about triod curves!

[nigelwright7557]

Originally posted by kuka_v
Have you any idea about this pentod, I mean 837 tubes.
Nothing information at all... I have tryed search here and google too.
I want to make SE amplifies based on this tube.
Can anybody help me with 837's in triod curves? May be you get me your personal opinion about triod mode for this tube.

PS Typical datasheet I already have! I ask about triod curves!

I would have gone for a more available valve.
Otherwise when the valve finally wears out you will have trouble getting another one.

[kuka_v]

It is an answer, but not for me! I have others target, it is not me first aplifier.
I want to "cook" this one!

[jlsem]

I would have gone for a more available valve.
Otherwise when the valve finally wears out you will have trouble getting another one.

The 837 is a readily available and very inexpensive tube for what it is. As for triode curves, you'll probably just have to derive them yourself. It's possible that Tubelab has done some experimenting with them.

John

[kalinowski]

http://www.mif.pg.gda.pl/homepages/f.../049/8/837.pdf

here's a datasheet if you haven't found one yet. tube looks really good, please report about build progress.

[nigelwright7557]

Originally posted by jlsem


The 837 is a readily available and very inexpensive tube for what it is. As for triode curves, you'll probably just have to derive them yourself. It's possible that Tubelab has done some experimenting with them.

John

If you use a 12AX7 / ECC83 then the curves are in the data sheets.

Pretty much most guitar valve amps have 12AX7's on the front end so there are bags of examples for circuits.

I used this valve on a mixer pre amp and it gives very good results. I have 3 clean channels and a high gain channel that gives great distortion for my guitar.

[Bandersnatch]

hey-Hey!!!,
Why restrict yourself to running the 837 strapped as a triode? With some attention to its curves, it will work well as a pentode, or even properly proportioned Ultra-Linear( get the tap placed in the right spot, that is ).
cheers,
Douglas

[Tweeker]

Im not sure the screen would like UL. The max rating is listed as 200V? Whether this tube can be pushed in that regard I am uncertain.

[Bandersnatch]

Originally posted by Tweeker
Im not sure the screen would like UL. The max rating is listed as 200V? Whether this tube can be pushed in that regard I am uncertain.

One can get U-L with a CT winding to run CFB, or for that matter to energize the g2 directly. Either way, IIRC I've thought that the 837 was going to need positive grid drive in any case.
cheers,
Douglas

[kuka_v]

.....
. tube looks really good, please report about build progress.

I have derived 837's in triod curves. And would like to share it to you.
There you can find some suggetion for using in SE.
(in attach)