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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