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.

Vacuum Tube Hearing Aids: 1921-1953

Zenith Miniature 75E Vacuum Tube Hearing Aid

The Zenith Miniature 75E vacuum tube hearing aid sub-model was manufactured by the Hearing Aid Division of the Zenith Radio Corporation of Chicago, IL beginning sometime after July, 1949.

The front of the case was partially "frosted" and partially clear plastic, while the back was of gold-colored anodized aluminum, all set over a black plastic chassis.

The Zenith Miniature 75E measured 4” by 2˝” by ⅞” thick, and weighed 6 oz. with the batteries.

The microphone grill consisted of 2 slots on each side of the Zenith crest (top center). The "Zenith" name is directly below the microphone grill.

The Zenith Model 75E used three vacuum tubes. It sold for $75.00, thus the model number also served as its price code.

 

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Side by side comparison of the fronts of Zenith Miniature 75 (left) and the Miniature 75E sub-model (right). (Both just have "Miniature 75" on their backs to identify them.)

The most obvious difference between these two aids is that the Miniature 75 had a gold-colored anodized aluminum front, while the later Miniature 75E sub-model had a clear/"frosted" plastic front.

For more information on the Zenith Miniature 75 see the previous hearing aid listing.

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Top view of the Zenith Miniature 75E showing the 4-position "H" (high), "M" (mid), "L" (low) and "F" (full) tone control (top left), and the 1-7 position volume control/on-off switch (right). The 2-prong receiver jack is in the center, surrounded by the metal pocket clip.

 

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Rear view of the Zenith Miniature 75E hearing aid showing the opened battery compartment. This hearing aid took a 22˝ volt "B" battery (Zenith Z-225 or equivalent such as the Eveready 412E) (center) and a 1˝ volt "A" battery (Zenith Z-IPL or equivalent such as the Eveready 1015E) (bottom).


 

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The back of the Zenith Miniature 75E hearing aid. In the top left is the word "VOLUME" and in the top right the word "TONE".

On the upper half are inscribed the words "Zenith", 'MINIATURE", "75" and "the royalty of hearing".

 

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The Zenith Miniature 75E in its original carrying case.

 

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View of the Zenith Miniature 75E carrying case.


 


 

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