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Dukane Model 3A55 MIc input transformer.

An octal plug in transformer for the Dukane Model 1E460A powered PA amplifier. These have been tested for continuity as per the pinouts.
$169.00
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There is little data available on these transformers, other than they are designed for low impedance balanced mic inputs, 600Ω ~ 150Ω.

The pinouts are as follow:

  • 1 external case.   
  • 2 NC according to schematic, but is connect to pin 3.
  • 3 Input center tap
  • 4 & 5 Input
  • 6 & 7 Output
  • 8 internal shield.  

 DMM Readings:

  • 3 to 4: 11.6Ω
  • 3 to 5: 10.2Ω
  • 4 to 5: 20.7Ω
  • 7 to 8: 2KΩ (varies)

You're welcome.