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.

 

Body Type Transistor Hearing Aids

Medicor Model MB-24xx Transistor (Body) Hearing Aid

The Medicor Model MB-24xx Transistor (Body) Hearing Aid was manufactured by Medicor Müvek of Budapest, Hungary in 1973.

There is no model number on this hearing aid, but it looks similar to other hearing aids in the MB-2400 series  such as the MB-2410 and MB-2411. Since it is newer, presumably it would have a model number greater than 2411. I here designate it as 24xx until the real model number is found.

This is probably a 4-transistor hearing aid. It measured 2 9/16" high x 1 13/16" wide x 11/16" thick (6.6 x 4.6 x 1.7 cm) and weighed 2.2 oz. (60 g) without the battery.

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Front view of the Medicor Model MB-24xx transistor hearing aid showing the chrome metal main part of the body with a gray plastic top and bottom.

Note the name "Medicor" at the top right and the wire pocket clip.

 

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Top view of the Medicor Model MB-24xx transistor hearing aid showing the volume control wheel (top left), the "M" (microphone), "T" (t-coil) and "O" (off) switch (bottom left), the microphone grill (center right) and the 3-position tone control lever (right).

Note: the volume control wheel is marked with a black line at its minimum position a double black line at its middle position (shown) and a triple black line at its loudest position.

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Rear view of the Medicor Model MB-24xx transistor hearing aid showing the letters "AVC" (automatic volume control) at the top, and a hole with an adjusting screw (center left). The function of this screw is unknown.

 

 

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Right side view of the Medicor Model MB-24xx transistor hearing aid showing the receiver cord jack.

 

 

 

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Close-up side view of the Medicor Model MB-24xx transistor hearing aid showing the receiver cord plug and jack. Note that the left pin is larger than the right pin so in could only be plugged in the correct way.

 

 

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Right side view of the Medicor Model MB-24xx transistor hearing aid showing the receiver cord plugged into the jack.

 

 

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Bottom view of the Medicor Model MB-24xx transistor hearing aid showing how the battery compartment cover pulled off to reveal the battery compartment.

 

 

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Close-up view of the bottom of the Medicor Model MB-24xx transistor hearing aid showing the battery compartment with the serial number at the bottom.

The first two digits of the serial number "73" indicate the year of manufacture—namely 1973.

 

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View of the battery compartment of the Medicor Model MB-24xx transistor hearing aid showing the 1.4 volt mercury battery in place such as this Duracell RM401H battery.

Note the "+" at the right side indicating that end as the positive terminal.

 

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Bottom view of the Medicor Model MB-24xx transistor hearing aid showing  the spring clips that hold the battery compartment door in place when fully pushed together.

 

 

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Side view of the receiver of the Medicor Model MB-24xx transistor hearing aid showing the pins inserted into the receiver jack. Most hearing aids of this era used a two pin plug rather than discrete pins.

 

 

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Rear view of the receiver of the Medicor Model MB-24xx transistor hearing aid.

 

 

 

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Front view of the receiver of the Medicor Model MB-24xx transistor hearing aid. At the top is the number "62" and at the bottom the number "412". At the right is a "star" or snowflake symbol.

 

 

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View of the front of the receiver of the Medicor Model MB-24xx transistor hearing aid showing the ear mold snapped apart. The ear mold snapped to the nubbin in the center of the receiver.
 

 

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The Medicor Model MB-24xx transistor hearing aid in its original carrying case.

 

 

 

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Outside view of the original carrying case for the Medicor Model MB-24xx transistor hearing aid. The case measured 4 5/16" x 2⅞" x 1⅛" (10.9 x 7.4 x 2.9 cm).

 

 

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Note the Medicor name embossed into the lower right corner of the case of the Medicor Model MB-24xx transistor hearing aid.

 

 

 

 

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