# Questions tagged [secondary-winding]

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### Does this transformer look like the secondary winding can be easily unwound to change the output voltage?

Similar to this post: How to bring down the output voltage of a 2 x 25 VAC 6 A transformer? (Around 35 VDC after rectifiers) I want to bring down the voltage of this low profile transformer. Does the ...
1 vote
143 views

### I would like to know the origin of the following formula

I don't understand what's in the red circle. Why is the unit 's' and what does 's' stand for? Why must we divide the current at Open-circuit test by the voltage at Open-circuit test? I don't ...
• 57
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### Why connecting two secondary windings together in an aiding dot-orientation parallel configuration will result in no output?

I need clarification on what would happen if the transformer is in aiding dot-orientation parallel configuration as shown below. Would that be the same as connecting two batteries, in parallel, as ...
57 views

### Why would an in series-opposition center-tapped transformer not be used to drive a circuit?

I understand that if a center-tapped transformer is connected in series-opposition as in the image below, there would be no voltage across both circuit terminals. But can the individual voltage ...
366 views

### Damage on Tesla Coil Secondary - is it ok?

I am building a small tesla coil (the OneTesla TinyTesla) and my secondary coil has some small damage. Is this damage tolerable as long as the wires still have continuity, or does it need to be a ...
• 392
32 views

### What is the sign convention for the primary counter balancing current of a 2-winding transformer?

In a two winding 1-phase transformer on load, Primary Current(I1) = No Load Current(Io) + Primary Counter Balancing Current(I2') So, We get I1 = Io + I2' We know I2' = K*I2, where K is the turns ratio ...
1 vote
200 views

### What actually constitutes a turn on a transformer coil?

Quick background on myself: I work as an engineering tech at a company that manufactures instrument transformers. I assist our technical director with designing transformers, however I do not have an ...
• 13
91 views

### Bumps in secondary coil

I am making my first Tesla coil, and I need some advice on the secondary coil. I have some bumps present and I don't know how to remove them from the wire. Do I need the wires to be straightened and ...
1 vote