C-Band 750W Dummy Load with a WR137 flange is a used part but in excellent condition.
The difficulty we face is finding the exact value of a dummy load. With this load our estimate runs from a low of 500 watts to a high of 1000 watt. We do this based on the number of fins and the overall length of the load.
In our own lab we try to match a load to the maximum output of the amplifier on test, but if the load is smaller than the exact value, we use a fan to maintain the effectiveness of the load.