Older Progressive Dynamics Dist panel Charger/Conv HELP

That thing is from 1976! There have been a few improvements in converter/chargers since then :)

It could still function but might not be worth the bother except in a special situation. The primitive 1981 contraption in our 1981 camper we just got still "worked" but got tossed out. ( It was made in Winnipeg, where they might still use that type, but not us! -ducking and running :) )