Easy enough to explain.
Yes you can get 2kw from a pair of 3-500Z
If you have the PS to handle it. You will be driving the snot out of the tube and severly cutting tube life but it can be done.
Same as the formula which I posted before in a closed thread.
P=E*I*efficiency
Henry amps run right at 4000VDC for B+
4000*.75ma*66% efficiency= 1980 watts
Heathkit SB1000 a single 3-500Z has 3400 VDC on the plate.
It will produce more or less the same output as an SB220 with a pair of 3-500Z.
Now the question is why? The FCC regulated amplifiers by input power when the Heathkit SB220 were being sold.
Then it was changed to regulate by output power to 1500w.
Some of the amplifiers being sold today will exceed legal limit easily, it is up to the op to keep the power output legal.
Yes even the hams run illegal power, some more than others.
It is all in the power supply and tank components
