I need a schematic for a Stewart-Warner Model 12-4D. I also would like to know how old it is, how to obtain a speaker or battery for it, and if it can run on AC.

Thanks!
Jason C.

Hi Jason

The schematic has been sent. The radio was made around 1940 and requires 1 1/2 volt "A" and 90 volt "B" battery. You can use a flashlight battery for the filaments, "A" battery. 10 - 9 volt transistor radio batteries in series will work for the "B" battery.

Your radio can not run off of AC but it would be a good idea to build a power supply if you plan to operate the radio very long. The price of batteries will add up..

You can take a speaker out of another radio or check garage sales. Antique Electronic Supply, tubesandmore.com sells speakers. Also check Radio Shack.

Norm

: I need a schematic for a Stewart-Warner Model 12-4D. I also would like to know how old it is, how to obtain a speaker or battery for it, and if it can run on AC.

: Thanks!
: Jason C.