Transformer identification

[Harry Bissell]

Fair warning: This advice is good for transformers presumed to be from
(hehheh) TUBE sets... These would have an Iron Laminated core (EI etc..)
You will see the various layers of core material, like plywood made of
steel...

If the core is Ferrite (an amorphous - glass like material made from
sintered powered iron) don't try this trick. These are used in most modern
TV sets and are for high frequency (usually 15.75KHz) switching power
supplies. These are usually a single unit including the flyback
transformer for High Voltage.  They will saturate almost instantly on 60Hz
and fry.

OTOH the ferrite cored transformers have very little DIY worth unless you
like X-rays or hate the neighbors dog.... ;^)>  Harry

Paul Perry wrote:

> At 04:48 PM 9/08/99 -0500, Tim Nowaczyk  wrote:
> >     I found a few old TV transformers <snip> simply putting
> >a voltage across some wires and testing the secondaries is out of the
> >question.
> >
> You only have to find the 'fattest' pair of wires.
> This is the 6.3v heater wire pair, usually.
> Then put 6.3 volts to this from another transformer.
> Then measure the outputs on the other wires (having previously
> checked which were connected to each other).
>
> WARNING: TV transformers (or any consumer stuff) can be weird.
>
> paul perry melbourne australia