Here’s a useful tool for testing both power supplies & batteries, a dummy load. This unit is rated up to 60W, at voltages from 1v to 25v, current from 200mA to 9.99A. This device requires a 12v DC power source separate from the load itself, to power the logic circuitry.
Now the final bits have arrived for the SWR Meter module, I can do the final assembly. Here the SMA connectors are installed on the side of the eBay meter, for forward & reverse power tap. These are simply tee’d off the wiring inside the meter where it connects to
The latest addition to my radio shack is the GY561 frequency & power meter, which has already come in useful for measuring the output power of all my radios. It’s a small device, roughly the same size & weight as a stock UV-5R. Power is provided by 3 AAA cells.