power toroidal transformer / WRONG VALUE

[Sinkia]

Hi Folks

I do have q uestion...

I have bought a transformer from Don Audio, which should be 220V / 9V / 5V sec.

Instead of those values, I do have 240V and 10V..
Can someone explain me how I can do to regulate those voltages before hitting my power supply PCB?
Many thanks in advance for your answer !
Best

 

[Anthon]

Have you measured it without a load? The voltage will decrease in a circuit.

A simple increase of the voltage drop resistor on the PCB should do it, if it is still a little bit high.

 

[Sinkia]

Have you measured it without a load? The voltage will decrease in a circuit.

A simple increase of the voltage drop resistor on the PCB should do it, if it is still a little bit high.

Yeah I have mesure it with no loead / nothing !
Hmm ok I see.
I'll try to figure out which resistor those are

 

[PRR]

The rated voltages are usually Full Load.

Small-medium transformers will sag 10%; or the other way, show 10% high at NO load.

And all tube-work can be +/-20%.

I'd say it is just what you need.

 

[Sinkia]

The rated voltages are usually Full Load.

Small-medium transformers will sag 10%; or the other way, show 10% high at NO load.

And all tube-work can be +/-20%.

I'd say it is just what you need.

Thanks !!  8)