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

Cleartone Model 700 Vacuum Tube Hearing Aid

 Cleartone was the tradename of American Sound Products of Chicago, IL.

The Cleartone Model 700 was released in November, 1950. It was a one-piece unit, containing 3 vacuum tubes and a printed circuit board.

The case was either gold-colored or silver-colored.

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There were only two controls—the on/off/volume control at the top left and a two position sliding tone control (top right) shown in the "Hi-tone" position (slid right).

The earpiece cord plugs into the two-pronged plug in the top center.


 

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The inside of the Cleartone 700 showing the 3 vacuum tubes (top left) and the volume control wheel (top right). The "A" battery compartment is the middle left and the "B" battery compartment is at the bottom.

 

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The back of the Cleartone 700 showing the model number. The Hi-Low tone control is at the top left and the volume control at the top right. The battery compartment door swings up from the bottom.

 


 

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