The Fradan Echomatic 50. Tape delay and 50 Watt valve amp in one box. Delivers 50 Watts RMS into 8 Ohms. The two output jacks are paralleled for 2 x 16 Ohm cabinets if desired.
Here is how you wire the footswitch on the Fradan Echomatic 50
Put the switch between pin 1 and pin 3 and an indicator bulb (6.3V AC) between pin 1 and pin 2. There is 6.3V from the valve heater supply between pin 2 and pin 3 so don’t short those pins or you will blow the internal fuse.