MFJ Enterprises Original MFJ-260C Dummy Load, 300 Watt, 0-650 MHz, Dry

Works as advertised although to date the highest power input to the dummy load was about 75 watts. In my experience MFJ makes good products.

Easy to use and exactly what I expected!

Worked great for my purposes. Transmitted 100w into it with a great swr.

Able to use it to check calibration on an antenna analyzer.

This dummy load maintains perfect SWR in HF bands and being rated for 300w means its duty cycle capacity is great when paired with a 100w and below transceiver. There is a handy graph painted on the front side to help understand duty cycles in relationship with operating power, so you dont have to guess or calculate. Works great up in the VHF/UHF frequencies also but youll see SWR increase somewhat (not into dangerous levels). Also, do understand that, combined with the coax, this still forms a bit of an antenna system (albeit highly inefficient) so some RF will make it out. It should travel far enough to cause disruption but if youre in a city or suburbs, be mindful of this...especially if youre using it to test frequencies outside of your license class allowed bands. You may also want to pick open frequencies with no traffic and avoid those used by local repeaters and such. Other than that, a great dummy load at a decent price for its capabilities!

It works

I only have 150 watts output and it worked just fine

Would not give correct swr readings with two different radios and an swr meter for VHF and nano vna for HF. I did not test it upon receipt and only discovered that it doesnt work after the return period. That is my fault. I need to file a warranty claim.

Measured with DVOM, 54.4 Ohms. It is a large 300W +/-10% 50 Ohm wire wound resistor inside. Within the 10% specs though.

Exactly as specified, good value for the money.