Hugh Hetherington Hearing Aid Museum
Hugh Hetherington Hearing Aid Museum

The Hearing Aid Museum

Hearing Aids of all types—Ear Trumpets, Carbon Hearing Aids, Vacuum Tube Hearing Aids, Transistor Hearing Aids, Body Hearing Aids, Eyeglass Hearing Aids and much more!

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Click on the "General Information" button (top button above) for an overview and general information on this category of hearing aid.

 

Vacuum Tube Hearing Aids: 1921-1953

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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