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General Radio Impedance Bridge Transformer 578-A, US $18.00 – Picture 0
General Radio Impedance Bridge Transformer 578-A, US $18.00 – Picture 1
General Radio Impedance Bridge Transformer 578-A, US $18.00 – Picture 2
General Radio Impedance Bridge Transformer 578-A, US $18.00 – Picture 3
General Radio Impedance Bridge Transformer 578-A, US $18.00 – Picture 0
General Radio Impedance Bridge Transformer 578-A, US $18.00 – Picture 1
General Radio Impedance Bridge Transformer 578-A, US $18.00 – Picture 2
General Radio Impedance Bridge Transformer 578-A, US $18.00 – Picture 3

General Radio Impedance Bridge Transformer 578-a

US $18.00

  • Greenacres, Washington, United States
  • Jun 9th
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This impedance bridge transformer was removed from a General Radio impedance bridge. Can't recall the model number of the device. This transformer however has the following specs according to a 1934 GenRad publication: Frequency Range = 50 cps to 10,000 cps Primary Impedance Range: 50 ohm to 5,000 ohm Secondary Impedance Range: 1,000 ohm to 100,000 ohm So this transformer will work into the audio range. The impedance bridge was operational when parted out so presumably this component  is also good. Each of the windings is shielded and has an appropriate terminal marked 'S' to go to ground. I measure 732mH and 33 DC ohms on the 600T side and 12.21H 690 DC ohms on the 2400T side so continuity is fine. Shipping is USPS Priority Flat Rate Mail.

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