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Old 9th June 2010, 09:15 AM   #1
Kuro is offline Kuro  Hong Kong
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Default Where to buy step-down toroidal transformer with electrostatic shield?

I'm looking for a high quality 50VA toroidal transformer with 6-0-6V output (or 2x0-6V)or 7-0-7V output (or 2x0-7V). I prefer having two primaries of 0-115V each so I can use it in parallel or in series.

Ideally, I'd prefer the transformer having an electrostatic shield b/w primary and secondary with wire from the shield for grounding. This is to avoid noise coupling from primary to secondary.

So far, I only see Nuvotem meeting most of the specs., but I don't see anyone advertising transformers with electrostatic shield.
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Old 13th June 2010, 02:01 AM   #2
jcx is offline jcx  United States
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shielded toroid still has large C between the windings and the shield - so you have the problem of where to gnd the shield

I'd rather have the order of magnitude less C in a split bobbin EI and forgo the shield
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Old 15th June 2010, 04:19 PM   #3
Kuro is offline Kuro  Hong Kong
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The problem is that I've a space constraint so an EI won't fit. Plus the fact that I don't want excessive heat from an EI.

Is there a way I can measure the capacitance of a toroid?
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Old 15th June 2010, 04:32 PM   #4
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try plitron
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