Description
This article is from the Antique Radios
And Phonographs FAQ, by Hank van Cleef vancleef@netcom with
numerous contributions by others.
48 Philco battery-powered radio - Can I get a converter at Radio Shack?
I have a Philco battery-powered radio. It has a four-prong plug for
the battery. Can I get a converter at Radio Shack and use it to make my
radio work?
No. The battery radios required 1.5 volts for the tube filaments and
67-1/2 or 90 volts for "B" (plate) voltage. The 3-way portables
(AC-DC-battery) had built-in battery eliminators, and the tube filaments
were generally wired in series, requiring a 6 or 9 volt "A" battery.
You'll need to make a supply that can deliver 1.5 volts at about 400 ma.
and 90 volts at about 50 ma. for your four-prong Philco. Both have to
be good clean filtered DC. The power-pak-in-the-plug type power units
sold by Radio Shack and others are made to deliver 6-9 volts at
100-200 ma. unfiltered DC.
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hobby, recreation, old radio, old phono, antique, radios, phonographs, tools, test equipment, resource, repair, identification, books, components
