Electronics from the 50s and 60s still can be used. You need to be gentle when powering them on to ensure the capacitors haven't reversed. My trick is to use a

Electronics from the 50s and 60s still can be used. You need to be gentle when powering them on to ensure the capacitors haven't reversed. My trick is to use a light bulb in series to the AC input to drop the voltage. As long as there doesn't appear to be a short, I keep swapping different wattage bulbs until it's running directly off the wall.