Comment I have is in your resistive divider. To keep the power dissipations
in the resistors low, you will have to use large resistor values, but at RF
these can be off 50 % or more.

Well, I hadn't thought of that, so I'm glad I asked the question. I had
planned on using a 200k 1/2 watt carbon and about 5k 1/2 watt for the divider,
keep the leads short, and locate it a close as possible to what I think is 50
ohms in my system.
Do you think it would be worth the time and effort to do an rf frequency
sweep of the divider to see how accurate it is? I realize this method is not
going to be dead accurate, but I was hoping for better than 50%.
73 Gary N4AST