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Re: [TCML] Faraday Cage Safety
Hi Ed,
Thank you for sharing your insight on Faraday cage safety. I will follow your advice and create a Faraday cage that covers the entirety of the coil. Do you have any advice as to how fine the wire mesh should be?
Thank you for your kindness,
Amir
-----Original Message-----
From: Ed Phillips <evp@xxxxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Sat, Aug 3, 2013 12:49 pm
Subject: Re: [TCML] Faraday Cage Safety
I'm not sure about the aesthetics of the cage but can add that for sure
the spark gap, capacitor, and all leads to and from the primary need to
be shielded as well, probably better than the top of the coil itself
because, in addition to the desired primary frequency, there will be VHF
signals of enormous peak power which will probably get into everything
in the vicinity and are potentially damaging. You haven't indicated
the size of your upper terminal but you should certainly expect your
streamers to reach the sides rather than the top. I have a coil of
similar dimensions operating from a 9 kV NST and it easily throws 27"
streamers and should probably do better with a good spark gap. You
should also have an 'RFI' filter in the primary circuit.
More experienced opinions will surely follow.
Ed
Amir Mojarradi wrote:
>Hi Everyone,
>
>
>I am almost finished creating a small (2.5" diameter x 12" height, 7.5kv/60ma)
Tesla coil for display in an office setting. However, I know I need to operate
the coil inside of a Faraday cage to protect sensitive electronics that are
around the office as well as from any over-curious observers.
>
>
>I was wondering if anyone had any insight constructing a permanent Faraday cage
that is both safe and aesthetically pleasing? I am curious to know if anyone has
tried using a birdcage or similar already existing material successfully and
with safe results. The dimensions would be 16" x 16" x 24", and I have thought
of using wire mesh, but I would like to make it look as good as possible.
>
>
>Also, I was wondering if the Faraday cage needs to only surround the primary
and secondary, or if it must surround everything including the spark gap and
transformer? This would alter my cage dimensions. From previous posts, I've
confirmed that a bottom and top are necessary as well.
>
>
>I wanted to double check to make sure I understand any special grounding
procedures. From my understanding, the coil is grounded to the cage and the cage
is grounded to the NST ground.
>
>
>Thank you so much for your help and any advice.
>
>
>All the best,
>
>
>Amir Mojarradi
>Los Angeles, CA
>_______________________________________________
>Tesla mailing list
>Tesla@xxxxxxxxxx
>http://www.pupman.com/mailman/listinfo/tesla
>
>
>
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