recording audio on a Nagra IV SJ

["Fernando de Izuzquiza"]

Hi all, 
Anyone have experience recording audio on a Nagra IV SJ recorder? 
As you know, this particular model was intended for scientific 
measurement and it records "direct" to tape, without inserting 
emphasis/deemphasis at record/playback, -theoretically- having 
excessive tape hiss because of that.

I'd like to know about any real experience with it, or well founded 
comments.

It was used a lot to record subsonic sources like very low freq 
elephant talk, high frew insect calls, traffic rumble/industrial studies, etc. 
It's freq resp was 2,5Hz to 35kHz, and DC to 4kHz on the central FM 
channel.

Thank you in advance, 

Fernando