I'm not shocked that there are only a handful of the RF ones. SP published a paper and the power out per watt of excitation was dismal. Dismal even compared to a DC excited one.
Its fully described in Bloom and Bell's book on gas lasers.
meanwhile back at the ranch.. I have a early Liconix self heating hecad manual with the initials W.S. on the checkout sheet. Bob, If I know it has a reasonable chance of surviving for another few decades, or going into a museum, it can be yours.
If its the W.S. I think it is, that makes it a potential museum piece.
Steve
Qui habet Christos, habet Vitam!
I should have rented the space under my name for advertising.
When I still could have...