I am getting ready to put in a cap order for a couple of winter projects. For the Airline 63-84 the same schematic is given for 4 or 5 models, starting with 62-79. This is a 1933 console radio with a power transformer and 10 tubes. The power tubes are 46's. The schematic appears to show five 8 mfd filter caps. My radio has definitely one 8 mfd cap in a rectangular wax paper box, a 10, a 20, a damaged illegible one could be a 10 mfd rolled paper caps, and two long wax paper box caps of different thicknesses, not marked. I don't have a capacitance meter.

The rectifier is an 80, which is said to be able to handle up to 32 mfd.
Would I be foolish to go ahead and install 20 and 10 mfd caps, simply replacing the unmarked caps with reasonable values?

Hi John,
Over the years your set has probably had many hands in it. Lots of times the tech's would use what they had on hand. I've run across it many times. If the schematics say 8 mfd that is most likely correct. 10 mfd's would be fine even 20's would work in a pinch. You would probably be good to go with the 10's because of the higher voltages used nowadays. I have a capacitor checker a BK 810B and it is rare to find an 80 year old cap with in tolerance so I mainly use it to check the new ones before I install them. I once had the schematic calling for a 16 mfd but someone in the past put in a 80 mfd and it worked fine, but I did replace it with the proper size. Hope this helps, Good Luck, George T

:I am getting ready to put in a cap order for a couple of winter projects. For the Airline 63-84 the same schematic is given for 4 or 5 models, starting with 62-79. This is a 1933 console radio with a power transformer and 10 tubes. The power tubes are 46's. The schematic appears to show five 8 mfd filter caps. My radio has definitely one 8 mfd cap in a rectangular wax paper box, a 10, a 20, a damaged illegible one could be a 10 mfd rolled paper caps, and two long wax paper box caps of different thicknesses, not marked. I don't have a capacitance meter.
:
:The rectifier is an 80, which is said to be able to handle up to 32 mfd.
:Would I be foolish to go ahead and install 20 and 10 mfd caps, simply replacing the unmarked caps with reasonable values?
: