Here are a few pictures of some of my test equipment. The top picture is of some of the slugs for the Bird Watt meter. The picture on bottom left is a power meter. And on the right is a Bird Watt meter. Both meters are used to test the power of my transmitters.
The Bird meter is also used to check the SWR of the aerials. With the various slugs, the meter is used on all the frequencies that I use, and it is the most useful of all the test gear I have. It should be the first piece of test equipment you buy.It was for me.