As the title says, here's a very nice pre/power/tuner trio from Yamaha. So what's been done? This:
* all electrolytics replaced (PS filter caps bypassed with film caps)
* upgraded op-amps with sockets for C-50
* all rice kernel lamps replaced
* powdercoated sheet metal in copper vein finish (tuner cover repainted)
* Deoxit pots and switches
* clean them up
* dial in bias and offset voltages
