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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
2x 24V is two separate 24V windings. You can wire them in parallel for 24V, or in series for what the Americans would call "48V CT". Or you can wire them in parallel with one reversed, and reduce the transformer to a smouldering ruin.
I'm not familiar with the MiniBrute, so I don't know what kind of transformer it really needs. But I'd bet it's less than 100VA, anyway.
Registered Member #1533
Joined: Wed Jun 11 2008, 02:13PM
Location: ReykjavÃk, Iceland
Posts: 46
cduma wrote ...
Hmmm... Quite clearly this is something other than what I thought. A good place to find the ferrite core is inside the power supply of a PC or inside any power brick/wall wart with primary resistance that is not indicative of a transformer which means switch mode power supply which usually use that type of transformer. If you use ones from a PC be careful since there are two large filter capacitors which will do more than tickle.
Avoid powdered iron cores, from manufacturers such as Micrometals as these are designed for DC choke applications with a low AL and losses that increase significantly with frequency. These toroids are most often found in the outputs of PC power supplies where they are used for output filtering and coupling the outputs. Don't be tempted to use them!
I have tried ignoring this advice as I am predisposed to for the sake of curiosity and I can testify that it does not bode well. You, cduma, should investigate things more closely before you give out advice on the subject in question.
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can someone please help me with some parts (ferrite core, filament transformer)
