Portable Dummy Load Revisited 

I had made a portable 50 Ohm Dummy Load using an Altoids tin with six (6) 300 Ohm 2 Watt resistors in parallel.  This allowed me to test any of my QRP transmitters rated under 12 Watts such as my BITX40.

With the Xiegu G90 Transceiver rated at 20 Watts, I would have to be sure to turn the transmitted power down every time to use my old dummy load. 

I bought ten 510 ohm 3 Watt resistors.  I place two bundles of five resistors apiece, twisted leads together and soldered. After both ends of each bundle was soldered. I unsoldered the original six 2W 300 Ohm resistors and replaced them with the two bundles of five 3W 510 Ohm resistors. This should provide a 51 Ohm load with a max power rating of 30 Watts.

The Diode is a Schottky diode to rectify the RF signal to provide a measurable peak voltage at the banana connectors. Thus peak and rms Power can be easily calculated.
   

The inside of the Altoids tin with new resistors in place. 

73 AB1OP Ralph