When I am trying out new circuits, I often will revert to borrowing form the technology used by designers and homebuilders from the 1920s, namely the "breadboard" circuit. In those days they actually used breadboards, or at least cheap pine boards. I still use this approach, but with more morern components and parts.

It has been said that one is better off never seeing the actual processes of producing sausages and legislation, I think it is attributable to Otto Von Bismarck. The same can be said about building tube amplifier circuits, too, at times...

This thing of beauty is the prototype of a single-ended guitar amp I've been working on, very loosely based on the 1950's vintage Fender "Champ" but with bigger tubes, higher voltages, and of course, more power.

With this "open" construction, there are plenty of exposed high voltages, both AC anad DC, which can deliver a nasty shock, (highest voltages are nearly 650VAC, and close to 400V DC, so this is not a good method for a permanent amplifier build.

Perhaps this can qualify as being related to GIFONA, as all of the vacuum tubes are from Russia.

So far it sounds pretty good, but then I'm not quire finished, before it gets committed to a steell or aluminum chassis and more conventional construction. For the sharp-eyed, the input jack should be the standard 1/4 inch "headphone" jack, buit I didn't have any in my junque boxes at the time, so I used an insulated RCA jack, the type most often seen on the backs of stereos, DVDs and CD players.

With the screw terminals, there is little soldering required, except for a few small resistors and capacitors, and I mount them on easily changeable or modifiable subassemblies, which are connected to the tube sockets via their screw terminals.

Oh, yeah, the wooden "chassis" is actually a real breadboard, I bought at one of the "Dollar Stores" around here, and it is bamboo, made in China. I bought several of these for just about any purpose other than the original intended ones.