When you look at the Ohm’s Law Wheel, select this formula: I = W/E (amps = watts ÷ volts); I = 5,000 watts ÷ by 240 volts; I = 20.8 amps; Because the electric space heater on a continuous load ...

With some clever engineering [John] managed to coax 100 watts out of a pair of 807s, so the entire amp “only” requires 20 power tubes. The build log shows some pretty impressive examples of ...