Lundahl 1539 as isolation transformer?

[ilfungo]

Hi can I use a Lundahl 1539 as isolation transformer between Digi 192 out ( balanced) and Amek m2000 input
( unbalanced) ?
How connect 1539 for 1:1 ratio?
THANKS!!!

 

[gyraf]

In Amek M2000, both channel line-1 and line-2 inputs are balanced (at least on the modules I've seen).

LL1539 likes very-very-low drive impedance - preferably minus 40 Ohms. It still may work fine, but you need to try for yourself to find out. Wire it pri. in parallel, sec. in series for 1:1

Jakob E.

 

[ilfungo]

Thanks gyraf
I'm using 2 channel out of 192 ( pro tools Master ) to external stereo input on monitor section ( master module).
My only problem is a low hum from 192.
I've tried Ebtech hum eliminator between and all noise is gone, but my doubt is about the level capabilities of Ebtech.


For lundahl 1539:
2+4 =in +
3+6 =in-

(7 connected to 11)
8 out +
12out -
Correct?
I don't know why but with this connection ( tested with transformer between soundcard in and out )result is +6 db
THANKS

 

[gyraf]

+6dB because you are now using both phases of 192-output - in unbalanced input you short minus side to ground