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DIY For Audio
Power Transformer Questions
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<blockquote data-quote="Family_Dog" data-source="post: 965882" data-attributes="member: 82"><p><em></em></p><p><em>1. When using a transformer like the one in my picture, and I connect mains to the 220VAC input, are all the different outputs (before the bridge rectifier - visible in the picture) always AC? i.e. AC in, AC out? I suspect so, but just need absolute confirmation.</em></p><p></p><p>Yes, but pulsating DC immediately after the bridge rectifier. Filter caps would sort that out.</p><p></p><p><em></em></p><p><em>2. When I connect mains to the input, and the one output (two wires) is 240v (vac) and I connect that OUTPUT to another items that operates on mains in, does this transformer then serve as an "isolation transformer"?</em></p><p></p><p>Yes, but subject to the total VA of the transformer secondary windings. If the transformer was made for a valve circuit, it is unlikely that the current would exceed 100mA or so, so it cannot be used as an isolation transformer for, eg., an AVR or Power Amp exceeding this.</p><p></p><p>-F_D</p></blockquote><p></p>
[QUOTE="Family_Dog, post: 965882, member: 82"] [i] 1. When using a transformer like the one in my picture, and I connect mains to the 220VAC input, are all the different outputs (before the bridge rectifier - visible in the picture) always AC? i.e. AC in, AC out? I suspect so, but just need absolute confirmation.[/i] Yes, but pulsating DC immediately after the bridge rectifier. Filter caps would sort that out. [i] 2. When I connect mains to the input, and the one output (two wires) is 240v (vac) and I connect that OUTPUT to another items that operates on mains in, does this transformer then serve as an "isolation transformer"?[/i] Yes, but subject to the total VA of the transformer secondary windings. If the transformer was made for a valve circuit, it is unlikely that the current would exceed 100mA or so, so it cannot be used as an isolation transformer for, eg., an AVR or Power Amp exceeding this. -F_D [/QUOTE]
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Power Transformer Questions
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