Re: [TCML] Turn-to-Turn short circuit

[Matthew Stevens <truesoutherngeek@xxxxxxxxx>]

This is a link to a picture of the coil in question

http://drop.io/overlapped_coil_chokes/asset/100-1673-crop-jpg

should I have used insulated wire?
I am using an 8kv, 30mA NST for a power supply
I think I understood what Stephen said, but I wanted to be certain before I
powered up!

On Sun, Mar 15, 2009 at 6:47 PM, Stephen Hiscock
<stephenhiscock@xxxxxxxxx>wrote:

> I'm assuming you are talking about a single layer inductor? and the wires
> are all touching each other? and they are all insulated?
> (if not insulated then you will have to work out the insulation of air for
> the gap between turns that you have)
>
> It depends on Voltage per turn (ie what is the final output voltage divided
> by the total number of turns),
> The insulation of the wire ie what voltage will produce a discharge through
> the insulation of surrounding each individual wire,
> and how far apart the overlapped the overlapped wire are from each other..
> eg you could have 20 wires overlapped if the over lapped wires are only
> overlapping one at a time and are all spaced far from each other.
> but if all next to each other, then it may be problem
>
> But saying this simply, if the Voltage per turn exceeds the wire insulation
> then you will have a problem ,but 99.99% of the time this won't apply.
>
>
> regards
> stephen
>
>
> Matthew Stevens wrote:
>
>> If two of turns on a coil overlap, will it cause a short? I am using two
>> chokes I made from pens and wire as RF filters, and one (only one) of the
>> turns overlaps another. Just wondering if this would cause a problem,
>> before
>> I put current to the coil!
>>
>> Thanks!
>>
>> Matthew
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