Hugh Hetherington Hearing Aid Museum
Hugh Hetherington Hearing Aid Museum

The Hearing Aid Museum

Hearing Aids of all types—Ear Trumpets, Carbon Hearing Aids, Vacuum Tube Hearing Aids, Transistor Hearing Aids, Body Hearing Aids, Eyeglass Hearing Aids and much more!

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Click on the "General Information" button (top button above) for an overview and general information on this category of hearing aid.


Body Type Transistor Hearing Aids

Dahlberg D-5 Hearing Aid

The Dahlberg D-5 all-transistor hearing aid, produced by Dahlberg Electronics, Inc., followed the D-5 hybrid later in 1953 and was Dahlberg’s first all transistor model. The D-5 used three CK718 transistors.

It used the same chrome case as the D-5 hybrid model, which measured 2½" x 1¾" by ⅞". It weighed 6 oz. with its battery.


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A single 1.4 Volt RM-1 mercury battery powered this hearing aid. This picture shows the back opened revealing the battery compartment (bottom left).


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The Dahlberg D-5 in its original case.



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