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!

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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

Danavox (Aditone) Model 547-HC2a Mod I Transistor Hearing Aid

The Danavox (Aditone) Model 547-HC2a Mod I transistor body hearing aid was made by Danavox International A/S of Copenhagen, Denmark in 1954. It was sold under the "Aditone" trade name in Germany. Note: it was sold in the USA under the trade name of  "Audibel" rather than "Aditone".

 It was a rather large hearing aid measuring 3⅜" x 2¼" x ¾" (8.7 x 5.7 x 1.9 cm). The body aid without batteries weighed 3.6 oz. (104 g).

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Front view of the Danavox (Aditone) 547-HC2a Mod I transistor body hearing aid showing the fancy microphone grill on each side of the pocket clip. The original HC2a had a small horizontal oval microphone grill and a gold-colored front.

 

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Top view of the Danavox (Aditone) 547-HC2a Mod I transistor body hearing aid showing the volume control wheel (left), the two-pronged receiver cord jack (center), the M (microphone), T (telecoil) and O  (off) switch (upper right) and the 3-position tone control (lower right) represented by the 1, 2 or 3 white dots.

 

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Front view of the Danavox (Aditone) 547-HC2a Mod I transistor body hearing aid showing the name "Aditone" (bottom right). Aditone Tvermoes KG was a German subsidiary of Danavox, based in Krefeld, Germany. Aditone was the original trade name of Danavox and later when they changed the trade name to Danavox, they continued to use the Aditone trade name in Germany.

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Right side view of the Danavox (Aditone) 547-HC2a Mod I transistor body hearing aid showing the volume control wheel (right).

 

 

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Left side and bottom view of the Danavox (Aditone) 547-HC2a Mod I transistor body hearing aid showing the hinge for the battery door (right).

 

 

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View of the top and front of the Danavox (Aditone) 547-HC2a Mod I transistor body hearing aid showing the pocket clip. The two rivet heads held the pocket clip in place. You could easily pull the clip off and mount it on the back if you so chose.

 

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Rear view of the Danavox (Aditone) 547-HC2a Mod I transistor body hearing aid showing the deep wine-colored back, a rather unusual color for hearing aids.

At the bottom is the swing-down battery door.

 

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Rear center view of the Danavox (Aditone) 547-HC2a Mod I transistor body hearing aid showing the model number (547 HC2a) and the serial number below it (5C 2709).

Below that is the slider button to open the battery compartment door. The battery door was spring-loaded so when you pushed the clip it automatically swung open.
 

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Lower rear view of the Danavox (Aditone) 547-HC2a Mod I transistor body hearing aid showing the battery compartment. This hearing aid took two No. 1015 (AA size) 1½ volt batteries such as the Eveready 1015-E carbon-zinc battery.

Note the spring clips to hold each battery are high on the positive terminal (right) side (to touch the center of the battery) and low on the negative terminal (left) side so they couldn't reach the positive terminal.

This was an ingenious way to prevent the batteries from working if they were inadvertently put in with the polarities reversed.

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