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

Zenith Model 75-X Transistor (Body) Hearing Aid

The Zenith Model 75-X transistor hearing aid was manufactured by the Hearing Aid Division of the Zenith Radio Corp. beginning in December 1954. It was an 3-transistor aid. In October, 1955 it was modified with 4 transistors.

The Zenith Model 75-X measured 2¾" x 1¾" x 11/16" thick, and weighed 2¾ oz. with battery. The case was polished aluminum.

The rectangular microphone grill was in the front center of the case with the name "Zenith" below it.

When it was new the Model 75-X sold for $75.00.

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Top view of the Zenith Model 75-X showing the 1 to 7 volume control/on-off switch (top front right) and the 4-position "H" (high), "M" (mid), "L" (low) and "F" (full) tone control (top front left). In the center is the receiver cord jack.
 

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Rear view of the Zenith 75-X showing the battery door which opened from the bottom of the case.

The Zenith Model 75-X took an "N" size 1.4 volt No. 401 mercury battery.

 

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Rear view of the Zenith Model 75-X showing the various inscriptions. The top left reads "VOLUME" and the top right "TONE". The upper center has the words "Zenith", "75-X" and "the royalty of hearing".

At the very bottom on the battery door is the serial number.

 

 

 

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