Those are DC input powers you are calculating, RF output will be less, generally a lot less, I would bet on maybe a half watt of output at 1dB compression from these class A modules into 75 ohms (Good luck getting them BTW they are way obsolete).
All the CATV stuff is specified into 75 ohms not 50, not that it much matters at these power levels.
Also, note that abs max is not a place you ever want to be, +55dBmv is -5dBV a nads over half a volt, waay more then the things will be linear with.
The only way you are getting 100W out of these is during a lightning strike!
Regards, Dan.