Clean amp for testing circuits

[azrael]

What's a nice circuit I can build to test out circuits? I want to have an amp I can just leave at my workbench and plug things in.
Something like the Noisy Cricket/Ruby don't have enough headroom. It's tough hearing what the circuit is doing and what the Ruby is doing.

Any ideas?

[davent]

If you want to use tubes I built an amp head based on the Fender 5F2-A  for testing (tubes/pedals) and playing, works great and is the amp i end up playing the most. In the amp picture thread someone has just posted pictures of their version of the 5F2-A. A great little amp!
dave

[jefe]

What's a nice circuit I can build to test out circuits? I want to have an amp I can just leave at my workbench and plug things in.
Something like the Noisy Cricket/Ruby don't have enough headroom. It's tough hearing what the circuit is doing and what the Ruby is doing.

Any ideas?

I use a stock Ruby as my bench amp, because it was cheap and easy to throw together. With the gain all the way down, it's quite clean. I'm running it at 9V, but for more clean headroom, you can run at 12V... or so I've read. I should really verify that for myself, I may end up leaving it at 12V.