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

Philips Model KL-6540 Transistor (Body) Hearing Aid

The Philips Model KL-6540 hearing aid was manufactured by Philips B. V. in The Netherlands in 1963.

The Model KL-6540 was the super wide range (broad band version) of the KL-6500 standard model.

This hearing aid used 4 transistors. The chrome case measured 3" x 1⅞" x ¾". It weighed 4 oz. without battery.

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Top view view of the Philips Model KL-6540 hearing aid showing the 9 position volume control (top left), the on-off switch/3 position tone control below the volume control and the round microphone grill (right),


 

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Left side view of the Philips Model KL-6540 hearing aid showing the t-coil switch in the microphone position (below pocket clip wire) and receiver cord jack (right). The on-off switch/3 position tone control with the 1, 2 and 3 dots position indicators (top left) and the black volume control (bottom left).

 

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Rear view of the Philips Model KL-6540 hearing aid showing the Philips name engraved near the bottom of the case.

 

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View of the receiver of the Philips Model KL-6540. The receiver cord plugged into the lower left side of the case.

 

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View of the bottom (inside) of the Philips Model KL-6540 showing the battery in place (left) and the power adjustment (right). You can set the power output from 0.2 milliwatts to 20 milliwatts.

 

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Bottom view of the Philips Model KL-6540 showing how the battery door swings to the right to reveal the battery compartment. It used a single AA sized battery. Shown is an Eveready 1½ volt No. 1015E battery.

 

 

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