| Hi Craig Not all buyers of radios used C batteries. When a person didn't use a C batterey C- was connected to A-. Without a C battery more current will be drawn from the B battery. When higher voltage B batteries are used even greater negative C voltage are needed. Best to use 3 penlight batteries for the C supply. No current will de drawn so batteries will last their shelf life. Norm :
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:Refer to the green buss markup on the Reference schema below.
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: Indeed, that last mentioned supply is the C bias source and is responsible for the 1st grid biasing of the last two audio tubes in
:your sets receiver tube complement.
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:Look at the different B+ supplies routings flow and you will see that the +45 is the supply level for the 1st audio /detector stage
:of the unit.
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:73's de Edd
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