Cleartone Model 700 Vacuum Tube Hearing Aid
Cleartone was the tradename of American Sound Products of
Chicago, IL.
The Cleartone Model 700 was released in November, 1950. It was a
one-piece unit, containing 3 vacuum tubes and a printed circuit board.
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There were only two controls—the on/off/volume control at the top left
and a two position sliding tone control (top right) shown in the
"Hi-tone" position (slid right). The earpiece cord plugs into the
two-pronged plug in the top center.
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The inside of the Cleartone 700 showing the 3 vacuum tubes (top left)
and the volume control wheel (top right). The "A" battery compartment is
the middle left and the "B" battery compartment is at the bottom. |
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The back of the Cleartone 700 showing the model number. The Hi-Low
tone control is at the top left and the volume control at the top right.
The battery compartment door swings up from the bottom.
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