I don't, and neither do you know if THERE was a dummy load.
Perhaps the original poster could clarify if he used a dummy load, just to keep you happy he wasn't breaking any rules.

Jeez.. what a can of worms. I was infact testing it into a 100w dummy load. I don't even own a 2 meter antenna apart from the one on my Baofeng handy. The joblot had some 4m, 2m and 70cms AKD transceivers as well as an FT-290R (which I tested the amp with). I don't have an antenna suitable for any of the above radios so they were all tested with a dummy load. My only operational antenna is a mini g5rv.

Thank you for all the helpful answers though, I'll give the relay a squirt of cleaner as suggested and take it from there.
Thanks again,
Steve

Well it says in your original post I tried it on 2mts even though your not sure what band it's for now it's a dummy load
Anyway chuff it I'm off to bed

2 metres is a wavelength. How the chuffity chuff does that imply he was using an antenna?

Yeah sorry I just read in the first post he said into a dummy load.