Acousticon A-90 (Imperial) Vacuum Tube Hearing Aid
The Acousticon A-90 (Imperial) hearing aid was produced by Dictograph
Products, Inc. of New York in 1947.
This model appears to have been their last 2-piece model as
subsequent models were all made with internal batteries.
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The hearing aid featured a maroon or wine colored body measuring 2 ¾”
by 2 3/8” by 13/16”. By the standards of the day it was one of the
smaller 2-piece models with a round microphone opening on the front
(hidden by the decorative grill/logo) and a
volume control on the top left.
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Left side view of the Acousticon A-90 showing the 4 position tone
control. Note the clip to hold the hearing aid in place on the clothing
(bottom left). |
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The Acousticon A-90 showing the ear piece or receiver (left) and the
battery cords for the "A" and "B" batteries (right) |
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The external batteries for the Acousticon A-90 were a 1½ volt "A" battery
(left) and a
22½ or 30 volt "B" battery (center). |
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A close-up of the receiver and the black ear mold attached it
it. At this time, although many ear molds were still stock models,
custom ear molds were available.
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