The terminology came from the multiple batteries used in early
equipment (particularly receivers). The B battery was the high
voltage (plates), the A battery was the filament supplies (if
I remember correctly) and the C battery was the bias if needed
(though self biasing was common).
> -----Original Message-----
> From: amps-admin@contesting.com [mailto:amps-admin@contesting.com]On
> Behalf Of RMead100@aol.com
> Sent: Wednesday, March 20, 2002 8:51 PM
> To: Amps@contesting.com
> Subject: [Amps] Terminology Question
>
>
>
> What is the origin of the B+ term in amp/radio/power supply
> terminology. I
> understand it to be the high voltage supply, but I do not know
> the origin of
> the designation and that has finally bothered me at age 52. It
> seems to me
> the only voltage referred to with this type of
> shorthand.........i.e. no A+
> or -; no B-, no C + or -.
>
>
> R Meadows
> k8BUX
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