Transformer DI for modulars

[DCMagnuson at aol.com]

Hi list,

I'm considering making a DI module for the output of my modular synth.  
Basically, I'd like to have a small mixer feed into a transformer so I can 
provide a balanced output to my mixer.  I have a few questions regarding this:

1) Can anyone recommend a suitable transformer?  I imagine I'd want a high 
input impedance, and around 600 ohm balanced output.  I hear good things 
about Jensen trannys... they are supposedly quite clean.  Any other 
manufacturers that I should look at?  

2)  I figure I'll need some attenuation to drop the signal levels from 10V 
p-p to standard line level.  Should this pad be put before or after the 
transformer?  I was figuring that putting the pad after the tanny will allow 
me to saturate the transformer a little, and "warm" things up a bit with some 
distortion.  Is this a good idea?  Maybe a selectable pad before and after 
the transformer would be best?

3) What precautionary measures should be taken to avoid damage from phantom 
power?  My mixer has globally selectable phantom power, so I need to protect 
the DI from damage.  Will the current limiting resistors in the mixer provide 
enough protection to avoid smoking something?  Transformers (inductors) are 
seen as shorts at DC, correct?  I just want to make sure I'm not going to 
kill either the transformer or my phantom power supply by drawing too much 
current.

Thanks everyone, and happy holidays

Dave Magnuson