#1
Hey there I am working on a project for guitar amplifier. So project requires 25-0-25 step down transformer. What is this. I mean how will it output voltage. Would 25+ and -25, +25 and 0 or something that will result total pd of 25. Well i will be testing my circuit in software simulation so i required help for it. I am beginner in electronic (Science student of A-levels).

Here is the description of project regarding transformers. I am bit confuse about output 25-0-25 transformer but +/-35 output.?

The amplifier is designed for a maximum loaded supply voltage of +/-35V, and this must not be exceeded. Normal tolerance for mains variations is +/-10%, and this is allowed for. The transformer must be rated for a nominal 25-0-25 volt output, and no more.
#2
25-0-25 means it puts out +25v AC when measure from the 0, which is a center-tap.
Here's the three wires coming from the secondary:

Last edited by Invader Jim at Jul 19, 2008,
#3
+25AC? The voltage across one end and the 0v tap will be 25VAC. Across the two outer ends, it will be 50VAC.
#5
But standards don't utilize polarity when referencing AC voltages. Simply 25VAC will suffice.