[Amps] Tube Question

[Byron Tatum]

Hello-
    I was wondering if someone could tell me :
        I am planning to use some 4CX250K tube socket assemblies { pair of socket assemblies mounted on plate, have raised screen ring assembly} that were removed from the AM1565, a UHF coaxial cavity. The sockets are set up now for cathode driven service. I plan to use these in a 432 Mhz. stripline amplifier, but prefer to use them grid driven {as the 4CX250R}. The 4CX250K has one significant difference - it has the cathode internally connected to the heater. I was thinking of modifying the socket assembly to allow grid driven service, but wanted to ask for advice, as I have not worked with these tubes before. Does a tube constructed such as the 4CX250K { heater tied to cathode} require any special treatment and is it OK to grid drive the tube?
    Thanks, WA5THJ.