|
|
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! |
|
|
|
|
|
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 |
Maico Model DJ "Commodore" Transistor (Body) Hearing Aid
The Maico Model DJ was manufactured by Maico Electronics, Inc. of
Minneapolis, MN in 1975. The name "Maico" was derived from the
initials of the Medical Acoustic Instrument Company.
The Model DJ used an integrated circuit, rather than discrete transistors. The case was
stainless steel . It measured 2½" x 1¾" x
⅝" thick.
The cord and receiver (earpiece) are shown to the right. An ear mold
(not shown) needs to be snapped to the receiver.
|
 |
Click picture for larger view |
| |
 
|
| |
|
|
Top view of the Model DJ showing the volume control (right) and 3 position tone
("N", "1" & "2") control (left). The jack (2 holes) in the
center is where you plugged in the receiver (earpiece) cord. The
microphone is between the jack and the volume control. In front of the
jack is a small lever for activating the T-coil. It has three
positions—"M" (microphone), "TM" (both microphone and t-coil), and "T"
(t-coil only).
Notice that the microphone was located on the top, not on the front as
was more commonly done with body aids. |
 |
Click picture for larger view |
| |
|
|
The Maico Model DJ used a 1½ volt Number 1015 (AA) battery. Note that there
were internal "screwdriver" controls for adjusting the tone, compression
and power output (5 positions each) that were accessed from inside the
hearing aid to the left of the battery.
|
 |
Click picture for larger view |
| |
|
(If a larger picture doesn't appear, you may have to
turn your pop-up blocker off)
|
|
|
|
|
 |
|
|
|
|
 |
|
|
