It is from a RCA 9K Console.
See Pic Below
http://www.findmall.com/gallery/albums/userpics/11182/RCA Elec Cap.JPG
AES does carry 20 mfd @ 500 volt electrolytic caps. If you have a 20-20-500 it will have two sections. Use two individual caps for replacement.
This might be an item previously replaced? I noticed a 30 & 10 mfd in the schematic. Exact values aren't critical. Schematic can be found here:
http://www.nostalgiaair.org/PagesByModel/347/M0015347.pdf
Norm
:This was bubbling on the RCA that I acquired. There is a number before the 20 (20?). Is it a 20-20-500? Would Antique Electronic Supply have it?
:
:It is from a RCA 9K Console.
:
:See Pic Below
:
:http://www.findmall.com/gallery/albums/userpics/11182/RCA Elec Cap.JPG
I really need some help here.