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

Sonotone Model 533  Vacuum Tube Hearing Aid

The Sonotone Model 533 vacuum tube hearing aid was manufactured by Sonotone International, Inc. of Elmsford, New York in 1942.

The Sonotone Model 533 used three vacuum tubes. It weighed 9¾ oz without the batteries and measured 5" high x 2⅜" wide by ⅞" thick (12.7 x 6.0 x 2.2 cm).

It was quite attractive with its shiny black plastic case with the pearlized inserts on the front.

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Right side view of the Sonotone Model 533 vacuum tube hearing aid showing the volume control.


 

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Left side view of the Sonotone Model 533 vacuum tube hearing aid showing the tone control. Both the volume and tone controls look identical and there are no markings on the case to tell them apart.

 

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Top view of the Sonotone Model 533 vacuum tube hearing aid showing the on-off switch (center).

 

 

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Top view of the Sonotone Model 533 vacuum tube hearing aid showing the battery/receiver cable unplugged. It was a bit unusual to have the battery cords plugged into the top of the hearing aid, rather than the more normal bottom plug.

 

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Close-up view of the  2-pronged "A" battery plug (left) and the 3-pronged "B" battery plug (right) of the Sonotone Model 533 vacuum tube hearing aid.

 

 

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Close-up view of the unplugged  2-pronged "A" battery plug (bottom) of the Sonotone Model 533 vacuum tube hearing aid and the top of a 1½ volt Sonotone No. 800X "A" battery.

 

 

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Close-up view of the unplugged 3-pronged "B" battery plug (bottom right) of the Sonotone Model 533 vacuum tube hearing aid and the top of a 45 volt Burgess No. XX30E "B" battery.

 

 

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This is what the Sonotone Model 533 vacuum tube hearing aid looked like when plugged into its "A" and "B" batteries.

 

 

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Side view of the Sonotone Model 533 vacuum tube hearing aid receiver and an early custom hard black plastic ear mold.
 

 

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View showing how the ear mold snapped to the receiver. Here shown unsnapped.


 

 

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Top rear view of the Sonotone Model 533 vacuum tube hearing aid showing the name (Sonotone) and serial number (B30194).

 

 

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The model number was at the lower back of the Sonotone Model 533 vacuum tube hearing aid.

 

 

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The Sonotone Model 533 vacuum tube hearing aid in its original leatherette carrying case.

 

 

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Outside view of the Sonotone Model 533 vacuum tube hearing aid's leatherette carrying case.

 

 


 

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