Here are 4 pics of the Amp referred to. I also have others that are identical
except for a change in serial number and perhaps a variation in the tuned frequency
which is irrelevant as any one on this forum will be changing the center frequency.
I'm toying with the idea of a four way power divider feeding four of them. That would
probably be between 650 and 700 watts out allowing for some inefficiencies.
The next step up would be a 1Kw tube amp.
PM me for more info
could you put up a photo of the amp not random one but one of the amp you have please.