Zenith Model 75 Vacuum Tube Hearing Aid
The Zenith Model 75 vacuum tube hearing aid was manufactured
by the Hearing Aid Division of the Zenith Radio Corporation of Chicago,
IL beginning in 1947.
The case was partially "frosted" and partially clear plastic. It measured 5⅜” by 2⅝” by ⅞” thick, and weighed
5¾
oz. without the batteries.
The microphone grill was a series of 3 semi-circles (top center). The
"Zenith" name is directly above the microphone grill.
The Zenith Model 75 used three vacuum tubes. It sold for $75.00, thus
the model number also served as the price code.
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Top view of the Zenith Model 75 showing the 4-position (1-4) tone control/on-off
switch (left), and the 1-8 position volume
control (right). The 2-prong receiver jack is in the center at the back.
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Rear view of the Zenith Model 75 hearing aid. The pocket clips are on
each side (upper half). The bottom half covers the battery compartment.
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Close-up view of the back of the Zenith Model 75 showing the information
engraved there.
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Rear view of the Zenith Model 75 hearing aid with the battery cover
removed. The "A" battery went on the right and the "B" battery on the
left. |
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View of the Zenith Model 75 battery compartment. It could be completely
removed from the hearing aid (as shown).
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