The schematic here on nostalgiaair shows the battery connections.
http://ww3.nostalgiaair.org/schematics/SRC/_SRC_5-41.gif
Norm
:SILVERTONE MOD 1850 DOES ANYONE HAVE THE BATTERY CONNECTIONS FOR THIS RADIO. I THINK IT USES 3-45v, 1-6v and 1-4.5v. I THINK IT WAS MADE IN 1935. THANKS