Hello Notroturbo4U: These older TV Sweep Tube Liner Amplifiers you gotta watch like anything else. I know some drive the tubes too hard having a high output power, but the tubes will die too soon, and at the prices for these old sweep tubes, its better use low power and let the tubes idel.
If I was going to fire this up, I would do it on low power about two watts, and the amp in low power and tune the driver for max then the finial tube tune and then load. . Might be a real hummer for SSB.
Remember it have has voltages that can kill ya deader than a door nail, be advised
Good luck
Jay in the Mojave