Oticon Model TA Vacuum Tube Hearing Aid
The Oticon Model TA vacuum-tube hearing aid was made by Oticon A/S of
Copenhagen, Denmark in 1946.
The Model TA was Oticon's first vacuum tube hearing aid.
The Oticon Model TA measured 3⅞" x 3" x
1⅛" (9.8 x 7.7 x 2.8 cm) thick and weighed 5.3 oz. (152 g) without the batteries.
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Front view of the
Oticon Model TA vacuum-tube hearing aid. It contained both the
microphone and all the electronics.
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Front view of the Oticon Model TA vacuum-tube hearing aid microphone
showing the microphone grill forming the word "Oticon" in black.
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Rear view of the Oticon Model TA vacuum-tube hearing aid showing the
pocket clip (top) and "name plate" (center).
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Close-up view of the Oticon Model TA vacuum-tube hearing aid name plate
showing the serial number (21353), and below that the name "Oticon" and
below that the model "TA"..
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Inside rear view of the Oticon Model TA vacuum-tube hearing aid circuit
board showing the 3 vacuum tubes (center) and other electronic
components.
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Inside front view of the Oticon Model TA vacuum-tube hearing aid circuit
board showing the microphone (large circle in the center) and other
electronic components.
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Bottom view of the Oticon Model TA vacuum-tube hearing aid showing the
unplugged receiver and battery cord plug.
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Bottom rear view of the Oticon Model TA vacuum-tube hearing aid showing
the receiver/battery cord plug assembly plugged in.
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Top view of the Oticon Model TA vacuum-tube hearing aid showing the
on-off/volume control wheel (center).
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Upper left side view of the Oticon Model TA vacuum-tube hearing aid showing the
"H" (high), "N" (normal) and "L" (low) tone control switch (center).
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Upper rear view of the Oticon Model TA vacuum-tube hearing aid showing the
spring-loaded pocket clip.
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Close-up side view of the Oticon Model TA vacuum-tube hearing aid
receiver and ear mold. I doubt that this is the original receiver as the
cord is spliced.
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Close-up view of the battery plugs of the Oticon Model TA vacuum-tube
hearing aid. The 2-prong "A" battery plug is on the left and the 3-prong
"B" battery plug is on the right.
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View of the Oticon Model TA vacuum-tube hearing aid with its two
external batteries plugged in. This hearing aid took a 1˝ volt "A" battery (such as the
Eveready D18) (back right), and a 45 volt "B" battery (such as the
Eveready B109) (back left).
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The Oticon Model TA vacuum-tube hearing aid in its original case.
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Outside view of the carrying case of the Oticon Model TA vacuum-tube
hearing aid. The case measured 5 11/16" x 4˝" x 1 13/16" (14.4 x 11.5
x 4.6 cm). |
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Top view of the carrying case of the Oticon Model TA vacuum-tube
hearing aid showing the name "Oticon" stamped in the upper left corner.
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