[LAU] OT: isolating transformers, redux

[linuxdsp]

Ken Restivo wrote:
> I've been looking around for a 1:1 line level transformer to lift the ground when connecting the headphone stereo output jack of a laptop or iPod to a consumer-grade amp that takes a headphone jack input.
> 
> All I've been able to  find is insanely expensive, like US$200.
> 
> http://www.jensen-transformers.com/prices.html#ci2rr
> 
> That's ridiculous. I just need the transformer itself; I can connectorize it myself.
> 
> But my searches (Jameco, Mouser, DigiKey) aren't turning up anything except POWER transformers, much larger than what I need.
> 
> Can anyone point me to some part numbers and (reasonable) prices for a 1:1 line level transformer?
> 
> Thanks.
> 
> -ken
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user at lists.linuxaudio.org
> http://lists.linuxaudio.org/listinfo/linux-audio-user
> 

I don't think that's insanely expensive :) given that jensen are 
probably one of the best at this sort of thing and their transformers 
are used in many professional grade applications - and if you are going 
to transformer-couple things then the quality of the transformer is 
absolutely critical (even to get consumer grade performance) and 
requires specialist knowledge and manufacture to get right (or a lot of 
luck!).  There may be other options that don't require a transformer - 
it depends upon the problem you are trying to solve.