Telex Deluxe Voltmeter for Hearing Aid Batteries
This Telex deluxe battery meter is a dual range meter for testing both A (1.5
volt) and B (22.5 volt) batteries.
It was used for testing hearing aid batteries in the period from 1949
when it was first made
to 1952.
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To measure "A" batteries, you lift the spring loaded arm up and place
the battery with the positive terminal facing down on the bottom
contact. Note: this bottom contact has two positions. For measuring "A"
batteries it is pushed in (see right).
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To measure "B" batteries, you likewise lift the spring loaded arm up
and place the battery with the positive terminal facing down on the
bottom contact. However in this case, you pull the bottom contact out
(see right). This switches the meter to the higher voltage range of the
"B" batteries. |
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View of the front of the original box for the Telex hearing aid
battery voltmeter.
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