Heres a new trick

[ElecronicsEdC]

go to thrift stores and good will and buy up any old 28-56kmodems

The transformer inside is worth it
Tried and true
couples audio perfectly !

[sakis]

cant be right ....audio signals in telephony are limmited to something like 3KHZ or so ... i wonder though if this is limited by the trafo or other parts of the circiut ...yet again the ratio of winding might also be an issue

kind regards sakis

[ElecronicsEdC]

I am using it in my app right now and it sounds great !

Give it a try ok !

[kenpeter]

600:600 transformers with very narrow bandwidth can behave much wider
when driven by low impedance <600 source into high impedance >600 load.
In this special case, not to your advantage to impedance match...
Assuming you desire the transformer only for balun and isolation.

[ElecronicsEdC]

correctumundo