>At what SWR does the Orion start to reduce its power output?
From Model 565 ORION Specifications at the front of the .pdf manual:
Rated RF Load: 50 ohms nominal, 2.0:1 maximum SWR.
Power output: ALC Adjustable 5-100 W, ? 1 dB.
and a clue here:
Current drain: 25 A max.
The specification of ?25 amperes? covers ORION?s performance under all
conditions, but if your antenna impedance is between 50 and 100 ohms, including
moderate reactance, a 22-ampere power supply will run ORION at close to
full power. If
you must have full power under all specified conditions, ORION needs 25
Simple answer is, full rated power at SWR 2.0:1 and below.
73, Bill W4ZV