[Amps] EIMAC Confusion

[mark]

In the EIMAC Technical Data for the 8877/3cx1500A7
is is stated in the ABSOLUTE Ratings the Plate Dissipation
is 1500W. I take this as an ABSOLUTE MAX.

However in the TYPICAL Operation at 88-108MHz USEFUL POWER OUTPUT
is rated at 2600W.

Is this meaning that the tube is providing 2600W to the load while plate
dissipation
is only 1500W? Is this possible ? If so What is then the TOTAL TUBE
DISSIPATION
and how is the filament power related to it ?

Mark