Yardleyite wrote:
Hi All
Looking for information and hook up specs for a Chicago Transformer MOD trans
CMS-1

What do you need that you can't find out?

With an ohmmeter you should be able to find out which wires make each
winding, and where the center taps are. It won't tell you which is
primary and which is secondary, though, but it puts you on the right
track.

Take a 6V filament transformer and connect it to one winding. Apply 6VAC.
Measure the voltage across that winding, then the voltage across the other
winding, and you now know the unloaded transformer ratio.

Now you'll know which is the primary and which is the secondary as well,
from the ratio. Apply a 1 KC square wave to the primary (which you can
get from the calibrator on a Tek scope), then look at the secondary on
a scope. Hang a variable resistor off the secondary and crank it down
until the output looks as square as possible. Now measure the resistance
of the pot and you'll know the optimal load impedance of the transformer.

What else do you need?
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."