Re: [TCML] Re: Toroid

[Futuret <futuret@xxxxxxx>]

Aluminum dryer duct definitely comes in 6" diameter, or it used to anyway.
Home depot used to sell it around here.  I haven't looked lately.  

The shop vac was probably blowing too much air across the gap and
interfering with the firing of the gap.  Changes in quenching have little or
no effect on tuning except as the sparks get longer you may have to
tap the primary outward (more turns) to account for spark loading tuning
effects.  

Do you have a photo of the spark gap posted somewhere?  Spark gaps
can be very cantankerous at times.  Spark gaps are very affected by
the number of series spark gaps for a giving voltage or input power,
and the shape of the gaps (flat, rounded, pointed, wide, narrow, etc).
The more power you put through a static spark gap, the more 
critical the gap design becomes to ensure adequate quenching.

Did you run your design through JavaTC to verify that you have
enough coupling between primary and secondary?  If the coupling
is too loose, you'll lose spark length.  Do you have the overall
specifications listed somewhere for this coil?  You may have
posted this in the past... I forget or missed it.  Also if the
capacitor is rather small, well in the STR range, this will reduce
the output too.  Do you have a video of the coil running so we can
hear the sound?  Apologies again if you've already posted this.

Cheers,
John

 

 

 

-----Original Message-----
From: Christian Hill <monolegal@xxxxxxxxx>
To: Tesla Coil Mailing List <tesla@xxxxxxxxxx>
Sent: Sun, Sep 30, 2012 7:40 pm
Subject: Re: [TCML] Re: Toroid


Hello. It is a static spark gap that was (probably poorly) quenched by a
computer case fan but is now unquenched. The fan burnt up the other day. I
can easily set up the shop vac to quench the gap. I would imagine that
changes in quenching will require changes in tuning, correct? I noticed a
reduction in arc length when the gap was quenched by the shop vac versus
when it was unquenched. The new toroid is 29" in total diameter with a 4"
ring. Aluminum dryer duct only seems to come in the 4" variety. Where can I
get some 6" diameter or larger flexible tubing? Thank you.
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