I also want to thank all the other posters. Some of the discussion were
definetly over my head but as time goes by I might understand this or that
detail better. First I need to get my hands on one of those SWR meters (I
hear the old URM 120 are quite good and rugged, if I don't built a meter
myself that might be the way to go) and gain some experience, I like to
learn the theory hand in hand with practical experiments.

The URM 120 and their variations are very good, especially for the money.
Think I payed about $ 150 for one at a hamfest. I was very luckey in that
it was new in a sealed box, never opened and was about 10 years or so old.
Someone had alot of them in a truck. It came with 3 plug in units and goes
from about 3 to 30 mhz up to 1000 watts and up to 1000 mhz to 500 watts.