Magnatone Model TR-7 Transistor (Body) Hearing Aid
The Magnatone Model TR-7 transistor body hearing aid was made for
Magnatone (unknown distributor, unknown location) by Conny Industrial Co. Ltd, Tokyo, Japan in 1959.
Note that the Model TR-7 was sold by Conny under their own name, and by
Magnatone and Lafayette under their respective names.
This 4-transistor hearing aid was 2⅝" high x 1¾" wide x 11/16"
thick (6.7 x 4.5 x 1.8 cm) and weighed 2.1 oz. (60 g) without the
battery.
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Front view of the Magnatone Model TR-7 transistor body hearing aid showing the
V-shaped wire pocket clip (upper center) that curves around the
triangular microphone grill. |
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Lower front view of the Magnatone Model TR-7 transistor body hearing aid
showing the "private label" Magnatone name.
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Top view of the Magnatone Model TR-7 transistor body hearing aid showing the
4-position tone control (left), the two-prong receiver cord jack
(center) and the 1-7
on-off/volume control (right). The tone control symbols were as
follows: F (flat frequency response), L (low tones stressed), M (medium
tone) and H (high tones stressed).
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Top view of the Magnatone Model TR-7 transistor body hearing aid showing the
two-pronged receiver cord plug and jack (shown unplugged). Note the
unusually long pins on the plug. |
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Left side view of the Magnatone Model TR-7 transistor body hearing aid
showing the "Mic" & "Tel" lever for switching between the microphone and
t-coil. (shown in the microphone position). |
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Front page of the Magnatone Model TR-7 transistor body hearing aid
instruction brochure. Read the
Magnatone instruction sheet here.
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Rear view of the Magnatone Model TR-7 transistor body hearing aid
showing markings for "Volume" (top left), "Tone" (upper right), t-coil
(lower center), and on the battery door (bottom) "4 Transistors" and
"Japan".
The case was the common light gold color used on many hearing aids of
the day.
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View of the empty battery compartment of the Magnatone Model TR-7 transistor body hearing aid
with the battery door swung up from the bottom. |
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Inside the battery door of the Magnatone Model TR-7 transistor body hearing aid
was a sticker showing the serial number (852980) and the model number
(TR-7). |
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The Magnatone Model TR-7 transistor body hearing aid
used a 1.5 volt size "N" carbon-zinc battery such as this
Lamina UM-5 battery. |
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Rear view of the receiver of the Magnatone Model TR-7 transistor hearing aid
with the receiver cord plugged into it.
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Front view of the receiver of the Magnatone Model TR-7 transistor
hearing aid showing the removable stock ear tip (shown attached here).
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The receiver of the Magnatone Model TR-7 transistor body hearing aid is
shown here unplugged from the receiver cord. The prongs on the plug are
unusually long.
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The Magnatone Model TR-7 transistor hearing aid in its original carrying
case.
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Outside view of the original carrying case for the Magnatone Model TR-7
transistor hearing aid. The case measured 4½" x 2¼" x 1½" (11.4 x 5.7 x
3.8 cm).
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Close-up view of the design embossed into the top of the case of the
Magnatone TR-7 transistor hearing aid.
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