A second thought and question about the zener voltages.
Is there a way to estimate what the output power in watts will be at various voltage levels?
I need to get my Low setting below 3 watts so I can tune with my amp on, as tuning with the amp off for some reason the SWR changes when I turn this amp on. However a mere 5 watts into this amp will give me a little over 100 watts out and that is over the tuning range of my LDG Auto Tuner.
So, I need perhaps 2 or 3 watts out on low power.