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Re: Filter Torroids Question
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To: tesla-at-grendel.objinc-dot-com
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Subject: Re: Filter Torroids Question
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From: jim.fosse-at-bdt-dot-com (Jim Fosse)
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Date: Tue, 05 Mar 1996 08:02:27 GMT
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On Mon, 4 Mar 1996 13:00:20 +0700, you wrote:
>Hi Jim,
>
>> >As far as the voltage rating on the wire, you shouldn't need to worry
>> >too much. These ferite toroids are non-conductive.
>>
>> WRONG, they are semiconductive. They vary between 10 ohms/meter and 10^5
>> ohms/meter! If you don't bleave me, put one on ground and connect the
>> secondary of your neon to it about 1/8" away!
>
>Actually Jim, I was talking specifically about those toroids that many of
>us have purchased lately from Hosfelt electronics. These particular toroids
>are plastic coated. So, they are non-conductive. I still covered mine with
>several layers of electrical tape. But you are correct, ferrite is a
>semiconductor.
>
>My apology for being vague,
>Scott Myers
No problem,
I ordered 10. I've only wound 2 so far. I put 1 layer of
electrical tape on them. I've had no problems yet at 15Kv -at- 60ma.
Now, my sons bike 30" away, that's another thread!
jim
p.s. I've been an EE for 20 years and got the supprise/shock of
my life last week when the wire started arcing to the ferrite core. I
KNEW they were insulators! Well so much for preconceptions.
EE 1978 UCB
Who's Who in the West
Who's Who in the World......
I hate it when I SLAM head first into the hard wall of reality! or
worse, the even harder wall of engineering ART!
jim