[Amps] Henry 3K Classic stby. Input Power?

[dl4seq at amsat.org]

Hello,

I bought a used Henry 3K Classic with one 3cx1200a7. The amplifier is working great and I am very satisfied with the quality of it. The output power is very good and really sufficient (1.5kw). What surprises me is the AC input during standby: 600w! Has anyone an idea if this is normal or if there is a problem?

Many thanks for every hint and 73's!
Markus, DL4SEQ