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!

Home Enter the Museum About Us Contact Us

FREE Subscription to:
Hearing Loss Help
The premier e-zine for people with hearing loss

Your email address
will never be
rented, traded or sold!

Your First Name:
Your E-mail:
Search this site:

 Results per
 page

 all words
 any words


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

Beltone Mono-pac Model AL "Allegro"  Transistor (Body) Hearing Aid

The Beltone Mono-pac Model AL "Allegro" was produced by the Beltone Electronics Corp. of Chicago, IL in 1954.

It measured 2¼” by 1½” by ⅝” and weighed 2 oz without the battery. It used 3 transistors.

The case was chrome front and back over a brown plastic chassis—visible on all sides. It came in two versions--a shirt pocket version and a tie-clip version (shown here).

The square microphone grill in the center of the front of the case consists of two columns of 5 rectangular slots.

Click picture for larger view

 

Back Next

 

Top view of the Beltone Mono-pac Model AL showing the volume control/on-off switch (top left),  and the receiver cord jack (right). The square hole above the right side of the receiver jack was for a protrusion on the receiver cord plug so it couldn't be plugged in wrong.

 

Click picture for larger view

 
Left side view of the Model AL showing the 2-position tone control.

 

Click picture for larger view

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

Note the yellow dot on the right side above the hinge.

 

Click picture for larger view

 
Comparison of two versions of the Beltone AL "Allegro" hearing aid. The model on the left has a standard pocket clip for wearing in a shirt pocket. The version on the right has a tie-clip so the hearing aid could be worn hidden under a man's tie.

 

Click picture for larger view

 
View of the battery compartment of the Beltone Model AL.

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

 

Click picture for larger view

 
View of the battery compartment of the Beltone Model AL showing the battery in place. It used an No. 450 1.4 volt mercury battery.


 

Click picture for larger view

 
The Beltone Mono-pac Model AL in its original case.

 

Click picture for larger view

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

 


 

Click picture for larger view

 

(If a larger picture doesn't appear, you may have to turn your pop-up blocker off)