Hello! I picked up a old radio receiver (schneider romance 57) and used it as a base for a AC4 build (based on the old 1960 schematics) here's the radio : i kept the housing, the chassis, power transformer, the rectifier (EZ80), and some pots / resistors / capacitors. the rest had to go! here it is with the EZ80 and the 2 new valve (nos philips EF86 and EL84) of course a 3-prong power chord was fitted (safety first) and everything grounded. i used an (big) old output transformer from another old tape recorder I was happy enough to use the original pot for on/off and volume, and a existing hole for the guitar input. Speaker is a 8" alnico weber 8A125 Here it is now : I have to say it sounds great ! I made some changed to old schematics : EF86 part : R8 changed to 1M (as in the AC15) Power supply : C5 changed to 32uF grid leak resistor moved to the input jack (a la fender) grid stopper changed to 33k EL84 : screen grid resistor added (2K 2w) OT connected to first filter capacitor (before the R3) (this way the screen grid voltage is just some volts under the plate voltage) And i did not wire the tremolo circuit. I have to say i'm pleased with the result ! I get a little overdrive with HB and a nice grit with a strat. All it misses is a nice reverb. Here is a sample with some reverb : http://picosong.com/wsV8D/ I hope you enjoyed my post, fell free to comment / ask some questions !