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Re: [TCML] Isolated secondary building up charge



Hi Jim, Krux,
 
IIRC, that may fall under the category of  "electret".
 
David Rieben
 
 

From: Jim Lux <jimlux@xxxxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx> 
Sent: Wednesday, March 26, 2014 5:03 AM
Subject: Re: [TCML] Isolated secondary building up charge


On 3/26/14 1:16 AM, Krux wrote:
> So this is a new one for me, but then I have only built one tesla coil, so the whole hobby is new...
>
> Anyway, I was tearing down my tesla coil, as I had designed it so that I could take it apart to easily transport it if needed.  I was carrying the 4.5" diameter secondary with top load attached across the room when I noticed it had a charge on it.. The charge was minimal at first, like if you are building up a static electric charge on something, and then when I was half way into the room it crossed into a "hey.. Ow.. Let's put this coil down on this bench here" level of painful zap..
>
> My best guess is that I was picking up on the magnetic fields that were being put off by all the florescent lighting in the room. Either that or my movement some how built up a static charge.. But has anyone heard of/experienced something like this before.
>
>
this has been noticed by lots of folks.  It's not magnetic fields, but 
electrostatic. Your coil has a nice insulating surface, so the secondary 
makes a fine capacitor.

I forget what it gets called if you want to search the archives. 
"residual charge" would be a good start. 


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