[RTTY] SPE 2K-FA amplifier duty cycle

[Bill Turner]

I'm thinking of getting an SPE 2K-FA amplifier and I have a question
about duty cycle at full power.

I understand it will run full 1500 watts on SSB and CW, but not so on
RTTY, at least not brick on the key mode. After a certain period of
operation it will cut back to a lower power level.

My question is how long will it run at 1500 watts carrier before
cutting back?

All comments welcome.

73, Bill W6WRT