DIY tube amps

As crazyeddy implied, Atma-Sphere offers a 60w mono OTL amp as a kit. It's a pretty demanding build, however.

I'm with bdp24. High power amps aren't the simplest creatures, especially tube designs. A 60 watt class A solid state amp is going to have something like 32V rails. A 60 watt tube amp is going to have rails more like 20 times that voltage. Frankly, that prospect scares me being as inexperienced as I am. I'd suggest digging around at diyaudio.com and see what the crowd over in the tube section is up to. Those folks are an endless wealth of information. I may build a tube front end for the F5 at some point. If I do, that's where I'm going first. 

@roxy54  Just got off the phone with Brian at ANK. We had a nice chat. The bonus is that we are both in Canada(and in the same Province to boot!!), and the whole import/currency exchange costs will be negated if I do decide to go this route. He has a client right here in my city that has just recently completed the EL34-70 monos that I am curious about, and is going to see about hooking us up. This will be an  excellent opportunity to hear and see the amps. I'm still unclear as to the lineage between ANK/ Audio Note UK/ Audio Note Japan. Brian was pressed for time, as am I, but I did address this with him, and he and I will discuss it later this week. I'll keep you posted.

If you are not an electronics guy, you might consider not messing around with tube circuits as they can be lethal.