Of what value is this trafo?

[wxn]

Taken out from an old Technics receiver, has center tapped secondary of about 2x20VAC. Could someone estimate rougly the power of this device?
Thanks

 

[wxn]

another pic

 

[leroy]

I would rate this transformer around 15VA

Leroy

 

[wxn]

Only 15VA? I hoped for at least 50...

 

[leroy]

The only way to find out is testing the transformer: increase the output load step by step and monitor the output voltage and transformer temperature. Output voltage should not drop more than 10..20% and temperature should not exceed 60 degC

 

[Frank Berry]

What was the power output of the amplifier from which this transformer was taken?

That should provide an estimate of the transformer's rating.

 

[AudioFreak]

I'd say 15VA or less.... 50VA is physically much larger than that.

 

[wxn]

What was the power output of the amplifier from which this transformer was taken?

That should provide an estimate of the transformer's rating.

IIRC it was 2x25W but delivered by a single STK4042 (or similat) mounted on a miserable heatsink...
Btw this trafo isn't so small, weights about 2kg