Well, I am getting 15v sine wave into a 50 ohm DL with the LD30, this looks promising. All I need now is a 500W audio amp suitably matched into 50 ohms.

I prefer to keep a standard 50 ohm system for measuring purposesd.

or

I could change the 15v to sq wave and build a class D fet amp, maybe a better approach.

If I proceed the Ant system would consist of 3 x inv L antennas in parallel, height about 100 ft and each one about 500 ft horizontal.

Will have to calculate the loading coil L maybe less than 1 H with some luck

This is just a proposal at present

de mal/g3kev