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SMPS transformer

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I was redesigning the power supply of my radio because the current one is too under powered to do the job so I swithced to a SMPS. The problem is that the requirements for said power supply must be:

Output 1: 20V with at least 10A of current (may go higher deppending on further calculations)

Output 2: 6V at 500mA

Output 3: same as output 2

Output 4: 12V at 100mA

I don't trust myself making this transformer because something is bound to blow up in my face (it always does). Is there anywhere I can go to get a custom SMPS transformer made for me? I've looked on Google but everywhere seems to have a transformer with certain output voltages that are less common but not what I need.
 
What is the input voltage to the SMPS?

Why do you need two separate identical 6V supplies? Do you require isolated grounds?
 
The input voltage would be 120V but I guess after it is rectified from AC it would be more like 160V.

I have 2 6V outputs because the thermal management part of the supply needs 2 different voltages, 5V for the IC that works the fan and 12V for the fan itself. It seemed more efficient this way than using a regulator that would waste power.
 
......I have 2 6V outputs because the thermal management part of the supply needs 2 different voltages, 5V for the IC that works the fan and 12V for the fan itself. It seemed more efficient this way than using a regulator that would waste power.
I still don't understand. Do you need two 6V outputs or one 5V and one 12V?
 
I really need a 5V and a 12V but I will just run the 6V through a couple diodes to drop it to an appropriate voltage for the IC.
 
Here's one company that will do custom transformers but they won't be cheap.
 
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