Re: [TCML] still stuck at 36"

[futuret@xxxxxxx]

Static gaps can fire erratically at times.  It sounds to me as
if this is happening on your coil.  The problem is a combination
of the capacitor value, the break-rate, the gap spacing,
and how much air blows on the gap perhaps.  By increasing
the airflow, you're probably intermittently inhibiting the
firing of the gap at times, thus producing the choppy,
stuttering sound.

When i talk about the combination of problems what
I mean is that if you narrow the gap, the problem may
go away, if you use a smaller cap, the problem may go away,
if you increase the break rate (by using a smaller cap or
less air flow or closer gaps) then the problem may go away.

So basically you're pushing the coil beyond what it wants
to produce (spark-length-wise) using the particular
components that you're using, and with the amount
of air-flow that you're using.

That's my best guess anyway.

John
--


-----Original Message-----
From: Bill Bohn <b.jbohn@xxxxxxxxxxx>
To: tesla@xxxxxxxxxx
Sent: Thu, 29 Jan 2009 5:54 pm
Subject: [TCML] still stuck at 36"



HI all, still chasing the elusive big spark.I have made a valve that can
control the air across the spark gap.Its a large ball valve t’ed to the 
hose
from the vac.

When the valve is about ½ open things seem slightly better.Will this 
act the
same as slowing the vac with a variac? Its just changing air flow as 
far as
I can tell.

0AAs I am gaining longer sparks now 40-44”I am wondering what influence my
fairly confined space has on streamer length.I am not hitting walls or
anything yet,

Soon I hope.Not stud walls with wires. They are cement blocks.This coil 
is
the largest I have built.The smaller ones have always had a rather 
pleasant
sound

about them,this one doesn’t have a steady harmonic like the smaller
coils.This thing is choppy, gruff, corse I have some thing not right! 
All my
tranys check ok

Lots of room on the primary for tuning .lots of top load options. mmc 
cap.
improved spark gap.lots of perseverance.And time.

Is there anyone in the west burbes of Minneapolis that I could 
contact/call,
that would be willing to talk.

Thanks again everyone!

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