I’m looking to build a vacuum-tube based linear amplifier. I’d like to do it all tube based, including the power supply. The original ARRL design I’m looking at (from the 60s) has two paralleled 807s delivering 150w, with 700v on the plates at 200ma. I was thinking perhaps I could double the output power to 300w by paralleling up four 807s. I guess that would draw twice the current.
The original power supply has a pair of 6DE4s for rectification, feeding a 5U4G. Assuming the transformer can handle the current draw, could I beef up the power supply to handle the four 807s by having 2 paralleled pairs of 6ED4s feeding a paralleled pair of 5U4Gs?