[NLRS] Repeater amplifiers for SSB?

[Doug Reed]

My opinion is that you could probably linearize an old vacuum tube FM
amplifier much easier than you could a transistor amp. Although
finding one of the old GE MASTR Pro 330W amps that used a 4CX250 might
be a little hard these days.... With the old Class C transistor FM
amps having multiple parallel finals, I wouldn't even want to attempt
biasing them.... Go with something modern instead.

Motorola often went in for odd-ball conduction-cooled power tubes.
They usually had beryllium for the heat sink insulator so they were
treated as hazardous waste. I can get you one of those up in Little
Falls, MN if you want to pick it up..... It is still in a Motorola
Motrac vintage FM repeater in a 6 foot rack.... Probably no more than
150W RF out.   :-)

73, Doug Reed, N0NAS.