Sterling Hearing Aid (Battery) Tester
This dual-scale battery meter carries the Sterling name. It was one type
of battery meter used in the 1940s and early 1950s to test the voltages of hearing
aid "A" and "B" batteries.
When testing
batteries, you held the wired probe to the negative side of the battery,
and touched one of the pins to the positive side. The pin at 7
o'clock is marked +50 and was for testing "B" batteries. The
pin at 5 o'clock is marked +2 and was for testing "A"
batteries.
|
 |
Click picture for larger view |
| |
 
|
| |
|
|
Close-up of the meter showing the two scales. The upper scale ranged
from 0 - 50 volts and was for testing the higher-voltage "B" batteries. The
lower scale ranged
from 0 - 2 volts and was for testing 1˝ volt "A" batteries.
|
 |
Click picture for larger view |
| |
|
(If a larger picture doesn't appear, you may have to
turn your pop-up blocker off)
|
|
|
