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Ballantine Variotransformer model 5, US $540 – Picture 0
Ballantine Variotransformer model 5, US $540 – Picture 1
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Ballantine Variotransformer model 5, US $540 – Picture 5
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Ballantine Variotransformer model 5, US $540 – Picture 0
Ballantine Variotransformer model 5, US $540 – Picture 1
Ballantine Variotransformer model 5, US $540 – Picture 2
Ballantine Variotransformer model 5, US $540 – Picture 3
Ballantine Variotransformer model 5, US $540 – Picture 4
Ballantine Variotransformer model 5, US $540 – Picture 5
Ballantine Variotransformer model 5, US $540 – Picture 6

Ballantine Variotransformer Model 5

US $540

  • New Castle, Pennsylvania, United States
  • Jan 29th
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Boonton Rubber Manufacturing Company, The Ballantine Variotransformer is a "tunable radio frequency amplifying transformer having a range from 200 to 600 meters...This transformer has both primary and secondary continuously variable by turning a single knob. Don't know much more about it. I do have the original receipt from 1924

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