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.

 

Vacuum Tube Hearing Aids: 1921-1953

Sonotone Model 600  Vacuum Tube Hearing Aid

The Sonotone Model 600 vacuum tube hearing aid was manufactured by Sonotone International, Inc. of Ossining, New York in 1945.

The Sonotone Model 600 vacuum tube hearing aid used three vacuum tubes. It weighed 5.9 oz. (170 g) without the batteries, receiver or cords. It measured 4 15/16" high x 2⅜" wide by 1" thick (12.5 x 6.1 x 2.5 cm).

Click picture for larger view

 

Back Next

 
Front view of the Sonotone Model 600 vacuum tube hearing aid showing the 5-slot microphone grill.

The plastic case was a light beige (almost skin color).


 

Click picture for larger view

 
Top view of the Sonotone Model 600 vacuum tube hearing aid showing the on-off/volume control wheel (center).

 

 

 

Click picture for larger view

 
Left side view of the Sonotone Model 600 vacuum tube hearing aid showing the bi-focal switch (left).

 

 

Click picture for larger view

 
Close-up view of the top left corner of the Sonotone Model 600 vacuum tube hearing aid showing the bi-focal switch (center).

The two-position bi-focal switch was either in the "full on" position or in the "half-on" position. In this latter position (the "bi-focal" position) it "dimmed out"  background sounds for clearer hearing in crowded, noisy places.

 

Click picture for larger view

 
Rear view of the Sonotone Model 600 vacuum tube hearing aid showing the pocket clip (upper center).

 

 

 

Click picture for larger view

 
Top left view of the back of the Sonotone Model 600 vacuum tube hearing aid showing the 6-position switch immediately to the left of the pocket clip. Shown here in position 6. This switch was probably the tone control.
 

 

Click picture for larger view

 
Rear view of the Sonotone Model 600 vacuum tube hearing aid showing the "nameplate" in the center of the back.

It show the manufacturer (Sonotone), the model number (600) and below that the serial number (634080) and below that, "Made in U.S.A.".

 

Click picture for larger view

 
Rear view of the Sonotone Model 600 vacuum tube hearing aid showing the A-B switch below the "nameplate". Sonotone used the AB designation for their high-cut filter (to cut out some of the annoying high-frequency sounds). Shown here in the "B" position.

 

Click picture for larger view

 

Bottom view of the Sonotone Model 600 vacuum tube hearing aid showing the V-shaped jacks for the battery cable plugs and the receiver cord plug.

 

 


 

Click picture for larger view

 

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