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Re: Coil Grounding


-----Original Message-----
From: Tesla List <tesla-at-pupman-dot-com>
To: tesla-at-pupman-dot-com <tesla-at-pupman-dot-com>
Date: Sunday, February 13, 2000 12:47 AM
Subject: Coil Grounding


>Original Poster: "Troy Peterson" <highvoltage-at-mad.scientist-dot-com>
>
>Hi all,
>
>I am rather new to coiling, having built a small (30cm) coil, and a solid
>state coil  (the dial 3055 type) I am now moving on to a larger coil, but I
>have a problem...
>
>I am in a small rented Duplex - my coiling work is done in the basement.
>How do I ground my coil? any suggestions? I can't run a heavy wire outside
>from in here, and I can't pound a ground rod through the cement floor. I am
>currently running my small coil on a water pipe, this may not be such a
>good idea, but it is a low power coil and it doesnt seem to be a problem. I
>have done a few calculations and located (but not purchased) the parts I
>need for the coil. My calculations are as follows, if you see any errors,
>or have any  suggestions plz send me a message back.
>
>  Primary xformer: E=10KV
>                           A=23ma
>
>               E
>               --- = Z = 434.78k ohms
>                I
>
>  Tank Capacitor:
>                               1
>                       C = -------- = 0.006202 uF
>                             2piFZ
>
>  Primary Coil:  Inverse conical
>
>      (I havn't done these calcs yet, I'm planning to wait till I have the
>ACTUAL specs on the secondary)
>
>  Secondary:
>                   Coil length: 61cm (24 inches)
>                   Coil Diameter: 20.3cm (8 inches)
>               Wire: 22 gauge
>                  ohms/ft: 16.2
>                  wire dia: 0.0285 inches
>                  turns/inch: 37
>                  feet/pound: 514.2
>                  req'd length of wire: 1858.88 ft
>           turns: 888
>
>
> Anyway, that's what I am planning, any comments, math errors, etc? Also, I
>plan to use beer-bottle capacitors because of parts availability where I
>live (small town - capacitors: hard to find, beer bottles: very easy ;)
>could someone help me to approximatly calculate the number of bottles I
>would need (and surface area of foil, etc) to achieve somewhere near the
>above noted value?
>
>Thank-you to anyone that can help,
>
>Troy Peterson [VE7SOK]
>highvoltage-at-mad.scientist-dot-com
>or
>troypete-at-sunwave-dot-com
>
> 

I have a coil that is about the same size( same power supply anyways) I
just grounded it to the ground connection in the fuse box (not the ground in
the electrical outlet) and it seems to work and hasn't started any fires
yet. I'm not sure this is such a good idea though.