Zenith Miniature 75 Vacuum Tube Hearing Aid
The Zenith Miniature 75 vacuum tube hearing aid was manufactured
by the Hearing Aid Division of the Zenith Radio Corporation of Chicago,
IL beginning in July, 1949.
The gold-colored anodized aluminum case was set over a black plastic
chassis.
The Zenith Miniature 75 measured
4” by 2˝” by ⅞” thick, and weighed 6
oz. with the batteries.
The keystone-shaped microphone grill was set behind the Zenith crest
(top center).
The Zenith Miniature 75 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 the 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 Miniature 75E sub-model see the following
hearing aid listing. |
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Top view of the Zenith Miniature 75 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. |
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Right side view of the Zenith Miniature 75 hearing aid. The pocket clips are on
each side.
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Rear view of the Zenith Miniature 75 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 75 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 75 in its original carrying case. |
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View of the Zenith Miniature 75 carrying case.
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