Re: rubber insulated wire for secondary (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Sun, 14 Oct 2007 13:16:30 EDT
From: FutureT@xxxxxxx
To: tesla@xxxxxxxxxx
Subject: Re: rubber insulated wire for secondary (fwd)

 
In a message dated 10/14/2007 12:06:44 P.M. US Eastern Standard Time,  
tesla@xxxxxxxxxx writes:

my first  coils were wound with plasic type coated wire, it will work, but
this  insulation 'space winds' and your number of turns are reduced, as
compaired  to reg magnet wire, and fewer turns MAY mean less spark. Heck, I
dunno ,  does this sound correct ?? ;-) ,anybody ?>



Yes, thick insulation does indeed "space-wind" the coil and may  reduce
the spark length due to a decrease in inductance.  One may  compensate
to a degree by making the secondary wider.  One a small coil, it  may
be more important to use many turns of close-wound wire.  On a  very
large coil, space-winding and/or fewer turns may be better tolerated.
In a general sense, fewer secondary turns results in a higher  frequency
which may limit the spark length especially in a small coil.   Fewer
secondary turns also results in the use of fewer primary turns which
results in a lower surge impedance which can result in higher spark
gap losses and lower efficiency especially in a small narrow coil.
 
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John



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