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

 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.


Vacuum Tube Hearing Aids: 1921-1953

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)