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Kuro 9th June 2010 09:15 AM

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.

jcx 13th June 2010 02:01 AM

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

Kuro 15th June 2010 04:19 PM

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?

ackcheng 15th June 2010 04:32 PM

try plitron

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