UPS transformer question

[indaco]

I got in hand two UPS trabsformers that I'm thinking to reuse for some job. I opened one, whose laminations are EI75 (I assume more o less 60VA since the core is about 10cm^2). By a check with the mains Vp=220V on the thinner wire of 0.7mm (blue-black) -> Vs=8.3V. The secondary diameter is thick, 2 paralleled wires of 1.5mm, but the thing that puzzles me is that they aren't normal enameled copper but they seem aluminium core (they are light and soft). The same for the thinner one. Has someone experimented that?

 

[thimios]

I got in hand two UPS trabsformers that I'm thinking to reuse for some job. I opened one, whose laminations are EI75 (I assume more o less 60VA since the core is about 10cm^2). By a check with the mains Vp=220V on the thinner wire of 0.7mm (blue-black) -> Vs=8.3V. The secondary diameter is thick, 2 paralleled wires of 1.5mm, but the thing that puzzles me is that they aren't normal enameled copper but they seem aluminium core (they are light and soft). The same for the thinner one. Has someone experimented that?

I have a same thing, i used this for my SX class A amplifier.
Don't try to solder wires, use something like this for transformer's connection.

 

[indaco]

I have a same thing, i used this for my SX class A amplifier.
Don't try to solder wires, use something like this for transformer's connection.

Yes, it's a good idea if the wires have aluminium core so can't be soldered easily