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

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!

Nice small load works great for my needs in my hobby in CB repair my radios

Well made and good quality. Works as it should.

This dummy load performs well and I use it whenever I am on the air with a Collins 32S-3 running 150 watts CW or a Yaesu FT-101B. I switch it in with an MFJ-1700B multi-port transmitter/antenna switch and its been functioning perfectly for almost a year. I installed it, put it under the operating desk and never had to look at it again - and thats the way it should be. NOTE: This dummy load is labeled as 300 watts and the derating curve gives it 60 seconds at 300 watts on a continuous duty cycle. When I use it for tuning it heats pretty well in under a minute with only a few continuous seconds at any time (I would estimate a 30% duty cycle). Sometimes this is a short time to tune-up old technology tube equipment like the Collins. This dummy load can do a max of three minutes at 25 watts continuous so the rating probably should be closer to 100 watts where the derating curve shows about 90 seconds of a continuous duty cycle. Whatever. Its a great accessory and I wish more people would use it to tune up before going on the air.

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.

It works

Seems a bit flimsy, but had no problems using it on a 200+ watt transceiver. Its 50 ohm input impedance measured well within tolerance.

to make adjustments to my radio

VERY handy for testing radios These perfect antennas allow a 5w transceiver to transmit a SOLID 20 feet. From inside a metal building,on a unused frequency, you wont really be bothering anybody. See FCC rules about unlicensed radios.

looks as it should