Tuesday 15 December 2015

Elecraft DL1 Dummy Load

Around the same time that I got the ZM-2 shown in my previous post, I also bought an Elecraft dummy load kit that you can find on this page.

One nice thing about it is that it includes a diode, capacitor and two convenient test points for measuring power with any high input impedance voltmeter. The manual comes with a graph for converting the voltage readings to watts. Using an inline meter to measure forward power as a reference, I got considerably more accurate results by using an old Heathkit RF probe across the load. However he test points are convenient and for my needs would be perfectly adequate to get relative readings for peaking the output of a QRP transmitter.

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