Building a power supply unit.
If i want to make a psu with two transformer, can I use only one female power pot? Parallel connect it to them. Am I using one fuse also?
Yes and yes. I have made so without any tech problem.
Last few questions,
1. You guys said 160VA-250VA(watt) per channel will be enough "save". Does it apply to the transformer before bridge or after?
As an example,
1. a 250VA Transformer 115V Primary, 25V/25V Secondary, and 10A. Bridge: *1.414. Finally = (25*1.414)V*10A = 353.5
2. a 250VA PSU, Transformer: Pri: 115V, Sec: 17.7V/17.7V, and 10A, Bridge: *1.414. Finally = (17.7*1.414)V*10A = 249.4VA?
Which one is right?
2. Does Secondary Voltage important to match the datasheet's graph? Or I just need to get enough VA(watt) rating?
Speaker: 10 Ohm, 35W. Target Power supply 20V Power rail 26-
Transformer A: Pri 115V, Sec 20V/20V, 12.5A
Bridge: *1.414 = (20*1.414)V12.5A = 353.5VA Per Channel
Transformer B: Pri 115V, Sec 12V/12V, 20.8A
Bridge: *1.414 = (12*1.414)V20.8A = 352.9VA Per Channel
3: If I am going to have some high current transformer such as above. Can a 3.15A fuse handle it, like Nuuk's site suggested? How is fuse work?
If it break when there is more than 3.15A go through it, then I should use higher rating fuse for those high current transformer, right?
All those through are my guessing only. Plz correct me, and my math. Feel Free to comment.:scratch:
250VA 2*18V => 250/(18+18)=6,94A
Can anyone answer the last two questions?:confused:
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