Micronic Model 202 Vacuum Tube Hearing Aid
The Micronic Model 202 one-piece vacuum tube hearing aid was made by
Micro-Electronic Products, Inc. of Boston, MA in 1948.
The Micronic Model 202 vacuum tube hearing aid measured 4 3/16” by 2¼” by
13/16” thick (10.6 x 5.7 x 2.1 cm). Without batteries, it
weighed 3.3 oz. (94 g).
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Front view of the Micronic Model 202 vacuum tube hearing aid showing the
attractive aluminum front. The microphone grill consisted of 4
horizontal slots situated between 2 sea horses (upper front). On the
lower front, was the Micronic name and above it their logo—a crowned
"M".
Note the pocket clips on each side (near the top).
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Top view of the Micronic Model 202 vacuum tube hearing aid showing the
on-off/3-position tone control (left) and the volume control wheel
(right).
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Rear view of the Micronic Model 202 vacuum tube hearing aid showing the
swing down battery door (lower half).
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Top rear view of the Micronic Model 202 vacuum tube hearing aid showing
the location of the model number (202).
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Rear side view of the battery compartment of the Micronic Model 202
vacuum tube hearing aid. The battery door swung down and out.
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Close-up view of the receiver cord plug of the Micronic Model 202
vacuum tube hearing aid. The receiver cord plugged into the top left
side of the battery compartment. A most unusual place to be sure.
This plug slid into place from the right to the left (shown in its
starting position on the right). Micronic used the Brush company's
rather unusual plug and jack for this model.
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Inside view of the battery compartment of the Micronic Model 202
vacuum tube hearing aid showing the serial number (M 212181) on the
metal divider between the "B" and "A" batteries. Also, note the receiver cord plug (top left)
in it's proper position when plugged in. |
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Close-up view of the battery compartment of the Micronic Model 202
vacuum tube hearing aid. This hearing aid used a 1½ volt "A" battery
such as the
Eveready 1015E and a 22½ volt "B" battery such as the
Eveready
412E. |
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View of the Micronic Model 202 vacuum tube hearing aid showing the
receiver cord and two-prong plug (receiver missing).
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