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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