[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: First coil



Original poster: "Jason by way of Terry Fritz <twftesla-at-qwest-dot-net>" <jasonp-at-btinternet-dot-com>

Joe,

Nod bad :) A better SG and probably better coupling/tuning will get you much
further. Build a TSG with an iggy coil - dimmer, 10uF cap and there you go.
Will work much better than that gap of yours. Also, try tuning it and put on
a breakout point. but as I say, not bad for a load of crap :)

Regards,
Jason
----- Original Message -----
From: "Tesla list" <tesla-at-pupman-dot-com>
To: <tesla-at-pupman-dot-com>
Sent: Friday, November 02, 2001 3:05 PM
Subject: First coil


> Original poster: "Joseph Geiss by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<joseph20-at-home-dot-com>
>
> hello all,
>
> about 1 year ago I decided to build a coil so I wound a secondary and
then,
> it happened, I got a girlfriend so all my money and time went to a
different
> cause. well tonight (Thursday) I decided to drag out the secondary I hand
> wound (ugh! never again) to see if I could make a coil with it and what I
> had laying around.
>
> The secondary is 4" ID PVC and about 20" tall with 15.5" wound it has
> 775turns of 26awg wire on it.
>
> The primary was a 3 turn hideously malformed flat spiral of 12awg house
> wire. It is about 1/2" from the secondary and varies from 1" to 1/4"
spacing
> between turns.
>
> The transformer is a single MOT
>
> The spark gap is a (now don't laugh) 1600rpm AC cooling fan I got out of
> some cooling unit, I broke 2 of the  metal fan blades off and trimmed the
> remaining 2 so its like a spinning metal ruler to make a sort of rotary
gap,
> one HV terminal of the MOT is connected to the motor shaft and the other
is
> connected to a flying lead that's close to the spinning blade and
completes
> the circuit about 80% of the time.
>
> The cap is slightly LTR, a .86uf microwave oven cap
>
> topload is a 4" ball of aluminum foil which could most likely be smashed
to
> a 1.5" - 2" ball
>
> This is in my basement and without the secondary grounded, if I prop up a
4'
> fluorescent tube on the near by table and bring one of the metal ends near
> the topload I can get 1" sparks, the gap sounds to be around 200-300
breaks
> per second but is probably lower than that because the flying lead shakes
> and gets to far away from the fan blades.
>
> not to bad for the crap I had laying around, any suggestions to get a
little
> more output?
>
> pleased with my junk coil,
> Joe Geiss in Maryland
>
>
>