I started this project long ago when I wanted to add a second amp to a vintage Tel Ray SS guitar chassis I found. Like so many early SS amps, the sound/tone is very nice but the power is too low. So I searched around and found a website that sells pcbs that sorta, from what I read, copied the design of a hifi stereo amp that hit the market and drove the hifi crowd wild. So I picked up the set from Chipamp.com and it comes with two amp boards and one power supply board. 2 amp brds for stereo applications. I didn't want to build a stereo rig so I built just one for mono guitar apps. The one problem with this build is finding the right power transformer that the chips like to see. But I found an old organ amp that I picked up for a song. I didn't really have a use for it so I measured the PT B+ and it has a nice, steady 25vdc after the rectifier. So, a little chopping and drilling and the end result is a strong, clean SS mono amp that I have been testing with some preamp/booster/overdrive pedals running straight into the Chip amp. The best so far is a clone of an early Boss pedal labeled the FA-1. I built that pedal a few yrs back using a pcb from Aion Elec. website and couldn't believe the gain it has. So much gain that it was not really usable straight into a good tube amp. But it is the bees knees for this chip amp. Power up the wazoo and lots of clean headroom. Couldn't be happier.