New cap test run

From:  Wysock, William C. [SMTP:Wysock-at-COURIER8.AERO-dot-org]
Sent:  Thursday, June 11, 1998 7:54 AM
To:  Tesla List
Cc:  ttr
Subject:  RE: New cap test run

Dear Ed,

Congratulations!  It sounds like you are getting just about maximum
performance out of your new coil configuration.  I hope you have
insulation discs inside the secondary coil form (preferably 1/4 up
from the bottom turn, a middle disc, and 1/4 down from the top turn.)
These should be at least 1/2" lucite or other plastic, sealed with
silicon (RTV.)  This will help insure that you don't fry the inside of
your coilform.  As for the transformer, if yours is the kind thart has
a removable inspection cover, you'll (typically) see down inside
through the transformer oil, a tap switch knob, marked as "1"
through "5" for positions.  If your transformer has the manufacturer's
label on the side, you'll see that tap position # 1 equals 100%,
i.e., the highest voltage setting on the high voltage winding.  Often,
as originally set by the power utilities, these transformers are set
to tap position # 3.  As Bert Pool would say, "safe coiling to you,"
and I hope you post images of your success, for all of us to see.
BTW:  Watch out for the neighbors!

Best Regards,
Bill Wysock
Tesla Technology Research
From: Tesla List
To: Tesla List
Subject: New cap test run
Date: Wednesday, June 10, 1998 6:12PM

From:  Esondrmn-at-aol-dot-com [SMTP:Esondrmn-at-aol-dot-com]
Sent:  Tuesday, June 09, 1998 10:21 AM
To:  tesla-at-pupman-dot-com
Subject:  New cap test run

Well, I fired up the coil last night with the second .025 mfd cap in 
with the first - for a total of .05 mfd.  The safety gap across the caps was
set to .50".  I had calculated best tune to be at turn 8.0.  It actually is 
turn 8.5.  With 3.3 ohms of resistive ballast in series with a 5000 watt
variac used as inductive ballast, I had 28 amps of primary current and 
pole transformer input voltage of 200 volts.  The system ran good with best
discharges to a grounded wire of about 72".

I tried changing from 3.3 ohms to the new 2.4 ohm resistor array and at max
power the system was some what erratic.  Primary current was 35 amps 
up to 45 amps.  Switched back to the 3.3 ohm resistors and changed the 
tap from the 240 volt output to the 280 volt output.  What a difference - we
had long sparks all over the place.  I had a wire extending about 2.0" off 
side of the toroid, aiming toward a grounded wire target.  From this point, 
had 75" plus sparks to the ground wire but also had multiple breakouts all
over the toroid, some as long as the ones leaving from the wire.  Had 
hits to the strike rail, must have had a couple into the primary also since
the main safety gaps fired a few times.  Primary current was 35 amps with 
transformer primary voltage at 250 volts (8.75 kva). Also had hits down to 
concrete driveway.  This is the first time this coil has had strikes that 
the earth.  The cap safety gaps never did fire!  This is great as that was 
major problem a month ago.

Based on the big increase in performance gained by going to the 280 volt tap
on the variac, it kind of makes me want to open up the pole transformer and
find the next higher voltage tap - maybe.  Next run I will try using both
toroids, the 40" on the bottom with the 33" raised up above it about 12".
This works good on my smaller coil to keep the sparks from hitting the

I know there are several other 6.0" dia coils out there.  What kind of
performance have you achieved?  My secondary winding length is 27.6" so I am
getting sparks that are 2.7 times as long as the secondary.

Finally happy in Spokane, Ed Sonderman