Last evening I built a dummy load for power supply and pulse-width modulator testing of my Class E transmitter project.
The dummy load resistors were taken from my old heat pump indoor unit when the system was replaced 3 years ago. I saved 4 of the 6 electric back-up heating elements. They are about 5 kW each, around 11 Ohms. I built them into a little frame made of some heavy aluminum angle stock and 1" x 2" firring strip stock. Convection cooling only in new application.
With these 4 resistor banks, 10 values are possible - 2.75, 3.7, 5.5, 11, 14.7, 16.5, 22, 27.5, 33, and 44 Ohms. The closest for my purposes is 5.5 and 11 Ohms.
The assembly is 15 3/4" tall.
Photo below:
nice job Tom
Brent