Mystery amp

[Aurora]

Some months ago I wrote about an amp I bought, unseen. FInally I have the amp at hand, and - voilá - a schematic.
The amp works, but seemingly have a slight tendency of instability at max volume.....
Anybody know this scematic, or have any comments???

[Littlewyan]

Looks like it was inspired by the JTM45, the pre amp anyway, in the sense that it has 2 gain stages, cathode follower (transistor, waste of time) and the same tone stack. The gain stages are set up a bit differently though. How does it sound?

[Aurora]

Except for the light warble at max volume, it sounds OK to me, - but - I'm an electronics geek, not a guitar man. I originally bought this amp to use it as parts for a Rocketish build for my son, but now I don't know....

[xtian]

cathode follower (transistor, waste of time)

What? Why a waste of time? Looks like it serves exactly the same purpose as the valve cathode follower in the JTM45.

See RG's article: http://www.geofex.com/Article_Folders/m ... tfolly.htm

[Littlewyan]

A valve cathode follower can be pushed into a nice non linear distortion. A transistor however will stay linear no matter how hard you push it so won't provide the same benefit. When it comes to distortion anyway.

[RB]

Check this link out if you want a solid-state follower to work like a hollow-state follower.

http://milas.spb.ru/~kmg/irf_en.html

Regards
RB