Back then the Finals were rather inexpensive from Eimac as you weren't required to put a second mortgage on your house just to replace the valves. When Henry Radio first started selling these High Power RF Amplifiers in the 1970s, they started out as Tempo 6N2 using a pair of 3CX400A / 8874s and capable of covering 50-54 MHz and 144-148 MHz using the Ground Grid configuration on both bands. I see you've got a later version 2006A amplifier using a single 3CX800A vacuum tube in the Ground Grid configuration. You've provided some information on your Tempo 2006A 6 meter RF amplifier as far as the Grid and Plate Currents and RF Drive but you haven't provided the Plate High Voltage DC reading.
