Yet again ive just been reading one of the all to common requests for help on a ham radio forum, where the absolute very first question anyone needs to ask to be able to help is 'what happens when you Tx to a dummy load?', and it is invariably answered by 'I dont have a dummy load' !! WTF!!!
Heres the lowdown - if you have a license to transmit, then you must have the means to check your kit without radiating. Its imperetive that you can tell if a problem is down to the antenna system or the radio. To do that you need a dummy load.
No two ways about it. The most essential item of kit you have after the radio is a dummy load. If you havent got one, then get one!
IF YOU HAVE A TRANSMITTER - GET A DUMMY LOAD!!!