[Al Skierkiewicz]

Hugh,
Are you saying you connected it to a Victor and it didn't work? The assembly instructions show the circuit connected to a Futaba 4.8 volt battery pack. It should produce standard RC remote signals that the Victor can use. Remember that if you are looking at the low side of the opto coupler then the voltage you see with a scope is the 5 volt supply less the drop across the diode and the series resistor. Remember that the Victor PWM input has a signal pin (White), a power supply pin(Red) and common pin (black). You must supply all three between the circuit and the Victor. There is the possibility you have damaged the Victor using the higher voltage. Try hanging a resistor of say 10K across the signal output and common (-) and then check with a scope. It should swing between power supply and zero volts.