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Unbalanced Audio Isolation Transformer



  • Ground-Loop Elimination
  • Ground Isolation in Unbalanced Line
  • Isolation in Rugged Field Case


APPLICATION: The AV-HK1 is a stereo transformer isolation module for use with unbalanced, high impedance audio inputs.   Input and output connections are provided on gold-plated phono jacks.

The shield connection of each INPUT jack is electronically isolated from the case and from the output ground.   The shield connection of each OUTPUT jack is connected to the case shield.  The user audio source, such as a computer, CD player, cassette player, or other consumer audio product connects to the AV-HK1 input.  The output should be connected to  the input of the grounded amplifier or mixer in the audio system.


                        Part #                     Typical Performance

 -10 dBV Nominal 10k ohms
 -10 dBV Nominal 10k ohms
Freq. Response
20 Hz to 20 kHz ( +/- 0.3 dB )
<0.5% ( 30 Hz to 20 kHz ) ; 0.05% @ 1 kHz

RDL Dark Ultrastyle ( Dark Gray w / Beige Lettering )


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Height 1.38 in. 3.5 cm ( unmounted )
Height 1.44 in. 3.66 cm ( mounted )
2.05 in.
5.20 cm
Length 2.90 in. 7.37 cm  



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