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

Radioear Model 41 Type C "Special" Vacuum Tube Hearing Aid

The Radioear Model 41 Type C "Special" was a 3-vacuum tube, 2-piece hearing aid manufactured by E. A. Myers & Sons of Pittsburg, PA in 1942.

The microphone grill consisted of 4 vertical slots (top). The case was an early black plastic. It measured 3⅞" x 1⅞" x ¾".

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The back of the Radioear Model 41 Type C "Special" In the center, is inscribed:

Type C
SPECIAL
RADIOEAR
Forty-one
Pats. Pending
M6501

 

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View of the upper back of the Radioear Model 41 Type C "Special" showing the off/volume control (upper right) in the off position.

Near the bottom left is a three-position screw—probably a high-medium-low tone control.

In the center and hanging down is the pocket clip. The hole in its top is so a lanyard could be threaded through it to wear it around your neck.
 

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View of the lower back of the Radioear Model 41 Type C "Special" showing a rather unusual switch. The upper "Bat. New" position (shown) was used when using a new battery. When the battery was nearing the end of its life, you pushed the lever down to the "Bat. Used" position. This probably switched out a resistor to increase the dropping battery voltage to increase the volume again.

 The Model 41 apparently used a special 34½ volt "B" battery and presumably the normal 1½ volt "A" battery.

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Bottom view of the Radioear Model 41 Type C "Special" showing 3 jacks (left) for the battery cord plug, and the 2 jacks (right) for the receiver cord plug.

This hearing aid used a crystal receiver (not shown).

 


 

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