W2SRF says:
>An old Eimac bulletin suggests 3-125 as a substitute with socket mods
I don't have data on the RK65. However, you will not get more than about 350 -
400 watts output in linear service from a pair of 4-125's (which I presume you
mean, since I can't find a 3-125), even with 3500 on the plates, although you
can get about 600-700 watts in Class C. My suggestion for a substitute for 1 kW
out is a pair of 4-400A's at 3500v, or go grounded grid with an input tuned
network and a pair of 3-500Z.
73
Peter G3RZP
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