Transformer wiring question

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paulrichards7
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Transformer wiring question

Post by paulrichards7 » Wed Mar 02, 2011 4:10 pm

Hi, I got hold of a couple of old transformers for my color box
I am looking at wiring diagram(see below)
http://i390.photobucket.com/albums/oo34 ... Triads.jpg
Now if I wire these as 600:600 line transformers
1. They will be unbalanced, right?
2. Not quite sure what the center tap does?
Any help would be great
Thanks
Paul

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digitaldrummer
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Post by digitaldrummer » Wed Mar 02, 2011 5:42 pm

wire them for the 600 ohm - which means you will tie the pair together and cover with some shrink tube.

Then hook pins 2 & 3 (tip and ring) of your jacks (XLR or TRS) to the transformer input and output pairs and you will have a balanced input and output. pay attention to the polarity so you don't inadvertently reverse phase. tie the grounds (pin 1 or sleeve) of your jacks and maybe connect the chassis of your transformer in there if needed. done.

Mike

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Scodiddly
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Post by Scodiddly » Wed Mar 02, 2011 7:46 pm

Each side has two 300-ohm windings. So think like you're figuring speaker wiring... put them in series for higher impedance, parallel for lower impedance.

There are uses for a center tap, but not really in your application.

paulrichards7
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Post by paulrichards7 » Thu Mar 03, 2011 3:23 pm

Thanks so much for that guys
Paul

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Post by rocksure » Mon Mar 21, 2011 3:36 am

I'd be interested to know how they sound when you get it done. I have a couple of Triad A67-j transformers that I am going to use a s 600:600 in a dual Spectra Sonics 110 preamp rack that I am building. It's got me interested in old Triad transformers in general.
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