Hi! I'm working on a mid 1930's rogers set, 6r1031, and there are a bunch of auto lite capacitors with only a serial number, no capacitance value marked on them.. Unfortunately the schematic here for the chassis doesn't include a reference list for the capacitors.. The serial numbers are for example, 38104, 38102, 38108.. If anyone knows what that represents, or a site where the capacitance values are listed would be greatly appreciated.!

This link doesn't directly answer your question but it does provide some ideas on how to deal with the lack of information.

http://canadianvintageradio.com/cvrs-forums/topic/autolite-capacitors/

Some additional advice: do the minimum work necessary to get the set playing. This may just involve replacing the electrolytic B+ filter caps. After the set is working, you can make educated guesses (per the link above) as to the values of the tubular paper bypass/couping caps and replace one or two at a time, checking that the set still operates OK after each operation.

John at Pacific TV has your schematic.

http://pacifictv.ca/schematics/rogers11-10pdata.pdf
The second page has the legend you need with all the cap values listed.

Found the chassis # which you provided, then found the Model # 11-10P by searching the list.

John's website is a valuable asset for Canadian radio info. Send him some business.

:This link doesn't directly answer your question but it does provide some ideas on how to deal with the lack of information.
:
:http://canadianvintageradio.com/cvrs-forums/topic/autolite-capacitors/
:
:Some additional advice: do the minimum work necessary to get the set playing. This may just involve replacing the electrolytic B+ filter caps. After the set is working, you can make educated guesses (per the link above) as to the values of the tubular paper bypass/couping caps and replace one or two at a time, checking that the set still operates OK after each operation.
:

:John at Pacific TV has your schematic.
:
:http://pacifictv.ca/schematics/rogers11-10pdata.pdf
:The second page has the legend you need with all the cap values listed.
:
:
:Found the chassis # which you provided, then found the Model # 11-10P by searching the list.
:
:John's website is a valuable asset for Canadian radio info. Send him some business.
:
:
:
::This link doesn't directly answer your question but it does provide some ideas on how to deal with the lack of information.
::
::http://canadianvintageradio.com/cvrs-forums/topic/autolite-capacitors/
::
::Some additional advice: do the minimum work necessary to get the set playing. This may just involve replacing the electrolytic B+ filter caps. After the set is working, you can make educated guesses (per the link above) as to the values of the tubular paper bypass/couping caps and replace one or two at a time, checking that the set still operates OK after each operation.
::
:Thanks for that link to the schematic John..! I'll totally send john some business..! Thanks so much for the help!
:

:This link doesn't directly answer your question but it does provide some ideas on how to deal with the lack of information.
:
:http://canadianvintageradio.com/cvrs-forums/topic/autolite-capacitors/
:
:Some additional advice: do the minimum work necessary to get the set playing. This may just involve replacing the electrolytic B+ filter caps. After the set is working, you can make educated guesses (per the link above) as to the values of the tubular paper bypass/couping caps and replace one or two at a time, checking that the set still operates OK after each operation.

Thanks CV will do.!
:

:Hi! I'm working on a mid 1930's rogers set, 6r1031, and there are a bunch of auto lite capacitors with only a serial number, no capacitance value marked on them.. Unfortunately the schematic here for the chassis doesn't include a reference list for the capacitors.. The serial numbers are for example, 38104, 38102, 38108.. If anyone knows what that represents, or a site where the capacitance values are listed would be greatly appreciated.!
:
The values of coupling and bypass capacitors generally are not critical. Set manufacturers typically used what was least expensive (or something they bought in huge quanties to get a price break), and still gave acceptable performance - which means capacitor values tend to be on the low side. .1 mfd, 400 volt typically will work for all paper coupling or bypass capacitors - anything connected to the grid of a tube in an audio circuit (or bypass in an RF circuit.) Paper bypass capacitors across a cathode can be .25 mfd 200 volt (or higher) for an audio tube, and .01 to .1 mfd 200 volt for RF circuits. Capacitors in tone control circuits, and RF coupling, are more critical. The capacitor connected across the output transformer should typically be .02 mfd., 600 volt. EdM