Viennatone Model F Transistor (Body) Hearing Aid
The Viennatone Model F transistor hearing aid was made by Viennatone
GES. M.D.H. in Vienna, Austria in 1958.
This 4-transistor hearing aid measured 3¼" x 2 7/16" x 13/16" (8.2 x
6.2 x 2.0 cm) and weighed 2½ oz. (72 g) without batteries.
Nowhere on this aid is the manufacturer's name or trade name shown.
|
 |
Click picture for larger view |
| |
|
| |
|
|
Front view of the Viennatone Model F transistor hearing aid showing the
model number ( large F) in the logo (center) and battery compartment
door (bottom).
|
 |
Click picture for larger view |
| |
|
|
Close-up view of the logo in the front center of the Viennatone Model F transistor hearing aid showing the
shield with the tiny rectangular microphone port in the center of it.
Below is the large F for the model number. |
 |
Click picture for larger view |
| |
|
|
Top view of the Viennatone Model F transistor hearing aid showing the
tone control (left), receiver cord jack (center) and volume
control/on-off wheel (right). The receiver and receiver cord are
missing as is the wire pocket clip.
|
 |
Click picture for larger view |
| |
|
|
Close-up view of the top right corner of the Viennatone Model F transistor hearing aid showing the
3-position tone control. The positions are marked as I, II, and III.
|
 |
Click picture for larger view |
| |
|
|
Close-up view of the upper right side of hte Viennatone Model F transistor hearing aid showing the
serial number (60587) to the right of the tone control.
|
 |
Click picture for larger view |
| |
|
|
Right side view of the Viennatone Model F transistor hearing aid. The
hole in the center is for attaching the wire pocket clip (missing).
There is a corresponding hole on the other side.
|
 |
Click picture for larger view |
| |
|
|
Rear view of the Viennatone Model F transistor hearing aid.
|
 |
Click picture for larger view |
| |
|
|
Bottom view of the Viennatone Model F transistor hearing aid showing the
battery compartment door opened revealing the two AA-sized batteries.
To open the battery compartment door, you unscrewed the plastic screw
(center) enough so the door could swivel 90°.
|
 |
Click picture for larger view |
| |
|
|
There was no need to completely unscrew the battery compartment door as
shown here. Note the red + (right) and black - (left) showing the
proper polarity of the batteries.
|
 |
Click picture for larger view |
| |
|
|
View of the battery compartment of the Viennatone Model F transistor hearing aid.
This hearing aid was rather unusual in that it could use either 1 or 2
batteries depending how much power you needed. If you only wanted to
use 1 battery (left), then you used a dummy battery (right) in the
other slot as the two battery slots were hooked together in series. |
 |
Click picture for larger view |
| |
|
|
View of the bottom of the Viennatone Model F transistor hearing aid showing the
real battery (left) and the dummy battery (right). This hearing aid
used AA batteries such as this
Eveready No. 1015E carbon-zinc battery.
|
 |
Click picture for larger view |
| |
|
|
Close-up view of the dummy battery of the Viennatone Model F transistor hearing aid.
The dummy battery was a piece of plastic the same size as the real
battery with a strip of metal that wrapped around both ends and one side
to complete the circuit so the current from the real battery could flow. |
 |
Click picture for larger view |
| |
|
|
The dummy batty (left) was exactly the same size as the real battery
(right).
|
 |
Click picture for larger view |
| |
|
|
Rear view of the Viennatone Model F transistor hearing aid showing the
two vertical marks (lower center) that lined up when the battery
compartment door turned the right way.
|
 |
Click picture for larger view |
| |
|
|
Bottom view of the Viennatone Model F transistor hearing aid showing the
battery compartment door screwed shut.
|
 |
Click picture for larger view |
| |
|
(If a larger picture doesn't appear, you may have to
turn your pop-up blocker off)
|
|
|
