Dec 07, 2008 07:37 am oh also its a twin channel pre.
transformer coupling.
Posted on Dec 07, 2008 07:37 am
Dematrix
http://www.reverbnation.com/2ndg
Member Since: Nov 27, 2007
On my new pre it has a transfomer coupling button for XLR inputs.
can someone tell me what this is and what it does? No explination is given in the manual.
thanks.
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Dec 07, 2008 07:37 am oh also its a twin channel pre.
Dec 07, 2008 01:45 pm Long or short, it eliminates hum or external noise on balanced i/o.
Here are a couple different little bits on it.
www.comrex.com/support/technotes/tn210.htm
Dec 07, 2008 07:26 pm oh, ok, i so its more a protection/noise thing?
i guess its best to always use it then.
thanks Noize.
might spend the rest of today getting to know this new pre, done a little bit on it, but not much. any cool tips for pre usage?
Dec 07, 2008 09:51 pm Noize is dead on here. Transformer coupling removes any DC from the circuit. And allows only AC to pass.
In high end pre's, this is used to lower the noise floor on the input. It's put in parallel with the input IC.
It also reduces the input impedance. Therefore reducing the noise.
Here is an article that explains some of it.
www.analog.com/library/an...ransformer.html
Dec 07, 2008 11:27 pm Thanx Rob, that was the article I was looking for but lost my link and coun't come up with it in google.
Mighta helped if I woulda searched properly.
Dec 08, 2008 10:50 am When I read the thread title, the childhood nerd in me was secretly hoping that this thread would be about Autobots having sex with each other or something...
Dec 08, 2008 11:07 am Tad, I have a wonderful animated GIF for that, but it's not apropos for this site.
Dec 08, 2008 01:00 pm Hahaha Herb. I did a Google image search in the hopes that I could accompany my post with a visual aid. I only found 1 pic and it, too, was not appropos for this site. I was hoping for something more "R" than "NC-17".
Dec 08, 2008 06:50 pm transfomer spooning was my next question.
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