[sdiy] Easy transformer question

Sat Mar 8 00:32:49 CET 2003

You can do whatever you like ;^P

The 'dot' on the two secondary windings indicates
polarity (like '+' on a battery)... you can put
the secondaries in series (which would double the voltage
out and double the impedance to 1200 ohms) or put them
in parallel (which would double the current out and half
the impedance to 300 ohms)... or leave one winding open and
use the other winding...

I can't say without some study what would be the best choice.
Nothing is likely to blow up in any of these cases... just
make sure that you watch the polarity. Connect these OUT of phase
and it will not work for sure !!!

H^) harry

--------Original Message--------  

From: trypannon at hotmail.com
To: "synth" <synth-diy at dropmix.xs4all.nl>
Sent: Mar 7 2003 18:11
Subject: [sdiy] Easy transformer question

>I finally got around to ordering the parts for a passive ring modulator, and
>I remember somebody told me that the transformer they'd seen used was mouser
># 42tl028.  http://www.mouser.com//catalog/specsheets/164249.pdf
>The circuit (http://www.synthfool.com/ringmod.html) shows two connections on
>one side of the transformer and three on the other, but this transformer has
>three connections on one side and four on the other, and I've been
>unsuccessful in my search for some sort of transformer 101 type pages.
>Basically what it boils down to is...do i only use two pins on the four pin
>side, or do I pair some of the pins together, or what?
>Thanks,
>Steve