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

Beltone Mono-pac Model S "Symphonette" Vacuum Tube Hearing Aid

The Beltone Mono-pac Model S "Symphonette" vacuum tube one-piece hearing aid was  produced by the Beltone Electronics Corp. of Chicago, IL in 1948.

 It measured 3⅝” by 2¼” by ⅞” and weighed 6 oz including the batteries. It used 3 vacuum tubes. This hearing aid used a printed circuit.

The case was a light tan-colored plastic front with a chrome back. Pocket clip is on the front in the center.

The microphone grill (top center) is in the shape of a square with rounded corners and inlaid with a filigree pattern.

Shown with the receiver is a phantom ear mold so the receiver button could be hidden below the collar making the ear mold much less visible.

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Top view of the Beltone Model S showing the 2-position tone control (labeled on the back as "1" and "2") (center) and the receiver cord jack (right).

 

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View of the left side of the Model S showing the volume control/on-off switch.

 

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Rear view of the Model S showing the make and model engraved in the case "Beltone MONO-PAC Model S".

Note the green dot beside the M (left just above the hinge). A dot here seems to indicate this aid used a magnetic receiver rather than a crystal one.

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View of the battery compartment of the Beltone Mono-pac Model S showing the batteries in place. The "A" battery (center) is an RM-3 1.4 volt mercury battery, while the "B" battery is a 22½ volt No. 412 E.

The battery compartment door is hinged at the top and swings upward.

 

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The Beltone Mono-pac Model S "Symphonette" in its original case.

 

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Outside view of the original case of the Beltone Mono-pac Model S.

 


 

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