Please help a mathematically challenged builder
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 1st April 2012, 05:03 PM #1 Apuesto Paul   diyAudio Member   Join Date: Mar 2012 Please help a mathematically challenged builder I am planning to build power conditioner/isolator for my tv and audio equipment. Depending on costs, I amplanning to build the following 1.) AC mains -> caps -> CMC -> caps -> component 2.) AC mains -> Trans 1 primaries/Trans 1 secondaries -> caps -> trans 2 secondaries/ trans 2 primaries -> component. (where trans 1 and trans 2 identical step down trannies) How do I calculate the values for the trannies and CMC? I am in the US (110 v) and the biggest device would be the TV that sucks 628 watts. Now I know ohm’s law, but how trannies are rated is just way above my pay grade. Also, how do I calculate the fuse sizes? Thanks for any help. Apuesto
 1st April 2012, 05:48 PM #2 DF96   diyAudio Member   Join Date: May 2007 For reasons of safety, I recommend you copy an existing design exactly. Even better, buy one. Otherwise, check that your loved ones have adequate insurance on your life and your house. Sorry, but if arithmetic confuses you then you really should not be building power conditioners.
 1st April 2012, 11:27 PM #3 Apuesto Paul   diyAudio Member   Join Date: Mar 2012 LOL! Good advice I am sure DF. I'm comfortable with the design and have built one for a phono amp with good result (and no fires yet!). I cannot find the formula (or probably do not recognise it if I did see it) that will tell me what rating a transformer or choke should be to be able to supply a component drwaing a specific wattage.

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