Paravox Model D Vacuum Tube Hearing Aid
The Paravox Hearing Aid Company of Cleveland, Ohio manufactured the Paravox
Model D (Top Twin Tone) vacuum tube hearing aid in 1950. It was one of a
range of Paravox hearing aids of the time that had a very attractive
brushed aluminum case. The volume control wheel was on the left side. A
pocket clip was located on the rear face. The Model D measured 2⅞” by
1¾” by ¾” and weighed 4 oz. with batteries. |
 |
Click picture for larger view |
| |
|
|
|
|
On the Model D, the gold
filigree microphone opening on the front was closed off. Instead it had
twin microphone openings on the top edge. (The gold knob in the center
is actually the top of the pocket clip.)
|
 |
Click picture for larger view |
| |
|
|
An unusual feature of the Paravox D is that the battery compartment
cover slid off, rather than the usual hinged cover. Here it is shown
half-opened. You can also see the gold-colored pocket clip at he top
left. |
 |
Click picture for larger view |
| |
|
|
The Paravox D used a 22½
volt 505E "B" battery (middle) and a 1.4 volt RM-1 mercury "A" battery
(bottom left). |
 |
Click picture for larger view |
| |
|
|
The Paravox Model D in its original
case. |
 |
Click picture for larger view |
| |
|
|
The outside of the the original case
for the Paravox Model D.
|
 |
Click picture for larger view |
| |
|
(If a larger picture doesn't appear, you may have to
turn your pop-up blocker off)
|
|
|
