The PHILCO Phorum
Value of cap is not listed??? - Printable Version

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+--- Thread: Value of cap is not listed??? (/showthread.php?tid=10101)


Value of cap is not listed??? - Dan Walker - 07-22-2014

I am working on a Philco model 650 and I find two caps that are not listed .
I would like to know the values of them.. They are Philco caps and the number of both of them is 30-4024S. the parts list does not show them. I think someone had replaced the original ones with this number.
They go from the speaker plug to ground.
Thanks Dan

RE: Value of cap is not listed??? - klondike98 - 07-22-2014

Philco Repair Bench shows 30-4024 as 0.006uF.

RE: Value of cap is not listed??? - Dan Walker - 07-22-2014

Thanks Bob, I thought that was the value by the schematics. I find that the Philco schematics are a lot harder to read than some of the others. I know it just takes time to learn, but that is what this forum is all about
Thanks Dan

RE: Value of cap is not listed??? - Dan Walker - 07-22-2014

I checked my supply of caps and I have a .022@1600 volts and a .05@1000 volts.. I think that the .05 is too large, but could I use the .022 in place of the .006? Dan

RE: Value of cap is not listed??? - Ron Ramirez - 07-23-2014

They are on the USA 650 schematic - parts (86) and (87). Original part no. 30-4125, .006 uF. 30-4024 may be replacements for 30-4125?

http://www.nostalgiaair.org/PagesByModel/824/M0013824.pdf

Do not use .05 or .022 uF. Anything larger than .0068 uF will adversely affect the tone (cut the highs). Use .0047 or .0068 uF, 1000 volts.

RE: Value of cap is not listed??? - klondike98 - 07-23-2014

For Philcos between 1928 and 1947 you can get very clear and complete documentation from Chuck Schwark's Philco Repair Bench site for just a few bucks.

RE: Value of cap is not listed??? - Dan Walker - 07-23-2014

Thank you for the information.. I have ordered the documentation from Chuck.