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". |  | Click picture for larger view | | |   | | | |
| The back of the Radioear Model 41 Type C "Special" In the center, is inscribed: Type C
SPECIAL
RADIOEAR
Forty-one
Pats. Pending
M6501 |  | Click picture for larger view | | | |
| 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. |  | Click picture for larger view | | | |
| 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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