questions about restoring old tube receiver

[office888]

So how much voltage should the replacement caps be marked for.

Can they be marked for a significantly higher voltage, say use a 600v cap in place of a 200v cap, or is the capacitance voltage dependent?

I found a Heathkit assembly manual and schematic, it has a parts list of all components used, however the list does not give me voltage ratings on the caps. The only mention of operating voltage is on the schematic, 250v on the transformer secondary times 2 going into the tube diode, but I dont know if its using both or how it works, so I either got 250 or 500v circut, maybe I break out the multimeter tomorrow, just hope i dont burn up the multimeter.

Honestly, I know very little as to how tubes work, plates, grids, etc is all new to me but I am learning. Also found out that cheap capicator testing multimeter will not work, I need a high voltage capacitance test rig I am told, or make one and time the discharge and convert with formulas.

The ratings are usually listed on the capacitor.

More volts is fine, if not better in some cases. You will not see a performance benefit though, unless the radio is operating right at the maximum.

Capacitance, +/- 20% is the accepted way for old caps...they were barely that range of tolerance from the factory to begin with. :laugh: