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Re: CONtrol of ELectronic RADiation

> A & B batteries?  So they didn't skip over those two letters, after all!

The "B" batteries in the old tube portable radios supplied the high voltage
(as opposed the the low voltage needed to light the tube filaments) to the
grids and plates of the tubes. As I recall, that was around 45 volts. Some
"B" batteries, because they consisted of as many as 30 individual cells,
were the size of a brick, weighed nearly as much, and cost a fortune.

Battery radios back then were really only meant for emergencies!