Increasing Voltage of a transformer

[MaxHeadRoom78]

I think he is blowing smoke, as long as you do not exceed roughly 1Kva in operation then there should be no problem.
What load do you plan on using?
Max.

 

[JimB]

"About up winding of Toroidal that is 19 Volt to 27 Volt. Its not technically possible. Coz your existing power rating changes from 1000 VA. To 1500 VA.

If we do this then your primary winding will be damaged."

Can someone please confirm if this claim is indeed true?

Yes, if you say it quickly it is quite true, well almost, the power would increase to 1420VA.

But that is assuming that the current rating remained the same, which is why earlier in post#2, I said:

If you increase the voltage per winding from 19 to 27v, the current rating will reduce to 26 x (19/27) = 18 Amps.

This will leave the power rating at 1000VA.

JimB

 

[audioguru]

The transformer is rated for 1000VA. 19V at 26A x 2.
Maybe you did not tell your vendor that you will reduce the maximum current from each new 27V output to 18A?

 

[unclejed613]

keep the primary fuse the same size... if you go over 1000VA, the fuse will blow... however, adding a ton of output devices is sure to increase current draw... it will increase the idle current. increasing the power supply voltage will increase the thermal stress on any 3-terminal regulators in the power supply, and standing currents in the diff amp and VAS (unless they are using constant current sources).

is there any particular reason for adding output devices and rail voltage? it seems like you are trying to actually increase the output power of the amp, but the limiting factor here will still be the capability of the primary winding of the power transformer. if you are only trying to increase the "dynamic headroom" of the amplifier, that's likely to work (you will also need to increase the voltage rating and capacitance of the main filter caps for it to be effective), but actually increasing the output power won't.

it might be useful to add some pictures of the schematics of this amplifier, because otherwise our comments are conjecture and guesswork.