11-16-2016, 10:38 PM
This schematic shows 52 an 53 as tone control and caps for it. Also the .05 cap that connects to the #20 resistor and c8. Could this be what you need?
http://www.philcoradio.com/images/phorum/19v6.jpg
http://www.philcoradio.com/images/phorum/19v6.jpg