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. |  | Click picture for larger view | | |   | | | |
| 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. |  | Click picture for larger view | | | |
| 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. |  | Click picture for larger view | | | |
| Right side view of the Zenith Miniature 75 hearing aid. The pocket clips are on each side.
|  | Click picture for larger view | | | |
| 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).
|  | Click picture for larger view | | | |
| 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".
|  | Click picture for larger view | | | |
| The Zenith Miniature 75 in its original carrying case. |  | Click picture for larger view | | | |
| View of the Zenith Miniature 75 carrying case.
|  | Click picture for larger view | | |
|
(If a larger picture doesn't appear, you may have to
turn your pop-up blocker off)
|
| |
