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Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 0
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 1
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 2
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 3
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 4
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 5
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 6
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 7
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 8
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 9
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 10
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 0
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 1
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 2
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 3
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 4
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 5
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 6
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 7
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 8
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 9
Vintage Bell Telephone "Tong Test" Ammeter, Original Case, 3 Ranges, #810, US $80.00 – Picture 10

Vintage Bell Telephone "tong Test" Ammeter, Original Case, 3 Ranges, #810

US $80.00

  • Niles, Michigan, United States
  • Jan 29th
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This a Bell Telephone vintage Columbia tong test ammeter from the 60's or 70's era. It has 3 meters which are interchangeable, 0 to 75 amperes, 0 to 200 amperes, and 0 to 500 amperes. For any old phone colletion this would be a must. The Columbia tong test ammeter is an example of the iron vane type, used for measuring large AC currents up to 1000 amperes. The iron jaws of the meter direct the magnetic field surrounding the conductor to an iron vane that is attached to the needle of the meter. The iron vane moves in proportion to the strength of the magnetic field, and thus produces a meter indication proportional to the current. This type of ammeter can measure both AC and DC currents and provides a true RMS current measurement of non-sinusoidal or distorted AC waveforms. Interchangeable meter movements can be installed in the clamping assembly to provide various full-scale current values up to 1000 amperes. The iron vane is in a small cylinder that is inserted in a space at the hinged end of the clamp-on jaws. Several jaw sizes are available for clamping around large conductors and bus bars up to 4 1/2 inches (110 mm) wide.
Seller Notes “Surface scratches as shown in pictures, a unique phone company tester”

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