Is this a good choice for El34 PP

[dstockwell]

http://www.bonavolta.ch/hobby/en/audio/el34_7.htm

Tring to find as simple as possible with enough power.

 

[SY]

It's not "simple as possible." But it's not horribly complex or challenging, either. The big problem will be finding that output transformer- if you substitute a different one, all that fancy compensation circuitry will have to be changed out, a very non-trivial task for a beginner. The second biggest problem will be duplicating the layout of the original so that stray capacitances and inductances don't upset that compensation.

If you want something simpler, clone a Mullard 5-20 or an Eico HF87.

 

[eduardio]

I'm 95% complete on a Mullard 5-20, it is a more straightforward design than the one you are considering.

For me as a beginner I think it was a good choice. It's an old circuit & there's stacks of information available in books & on the web. Just refer to it by name & experts abound.

Eduardo

PS - SY, like the new, less disturbing, picture!

 

[SY]

SY, like the new, less disturbing, picture!

I'll have to work on that.

 

[dstockwell]

Thanks, I will search around for those two and see what I can find.

 

[nilrog]

You can also have a look at this amplifier:
http://www.lundahl.se/claus_b.html

It's a modified Mullard 5-20. Very simple and easy to build, and the description of the modifications are very good.