If I remember correctly, in early radio use: A+ was the filament
voltage, B+ was the high voltage, and C- was the bias voltage.
Michael
--- RMead100@aol.com wrote:
>
> 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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