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20 Watt Dummyload using SMD resistors

first 19 pcs 1watt 470 ohm SMD resistors is soldered on a 3mm thick cobber-bar
470 / 19 = 24.7 Ohm.. on top of the first 19 resistors, 19 more is soldered
Now a 49.46 ohm resistor is made with good UHF behavior
Note the short leads to the BNC connector

The flus was not cleened avay, I recommend to do so if you dont like smoke, when peak overloading