Re: 12kV, 30ma TC (42" sparks),sync-gap vs. static gaps (fwd)

To: tesla-at-pupman-dot-com
Subject: Re: 12kV, 30ma TC (42" sparks),sync-gap vs. static gaps (fwd)
From: Tesla List <mod1-at-pupman-dot-com>
Date: Sun, 2 Aug 1998 21:50:18 -0600 (MDT)
Approved: mod1-at-pupman-dot-com



---------- Forwarded message ----------
Date: Sun, 2 Aug 1998 02:27:58 -0400
From: B**2 <bensonbd-at-erols-dot-com>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: 12kV, 30ma TC (42" sparks),sync-gap vs. static gaps (fwd)

Hi John, All,
    Charge a 10 uF capacitor to 500 Volts.  Switch it into the primary of an
HEI type of ignition coil (square shaped core, +ACQ-20 at Trak auto) with a 600
volt SCR.  The discharge period is tens of microseconds.  At a certain point
the core saturates.  The resulting voltage spike on the secondary is 30-40
kV and a few tens of nanoseconds wide. The voltage spike can be separated
from the slow voltage waveform with the use of a spark gap (sharpening gap)
set at about 20-25 kV made with at least one inch diameter spheres.

    If you are triggering a gap with copper pipes then the pulse can be
applied directly to one of the pipes in the middle of the chain.  Another
way is to strip the braid off about 2 feet of RG-8AU polyethylene insulated
cable.  Lay the insulated cable across the gaps with the open end
overhanging by about 6 inches.  Apply the sharpened pulse to the other end
of the insulated cable.  The electrostatic induction from the fast dV/dt
should be sufficient to ionize and break down the pipe gaps.

Barry



-----Original Message-----
From: Tesla List +ADw-tesla+AEA-pupman-dot-com+AD4-
To: tesla+AEA-pupman-dot-com +ADw-tesla+AEA-pupman-dot-com+AD4-
Date: Saturday, August 01, 1998 12:51 PM
Subject: Re: 12kV, 30ma TC (42+ACI- sparks),sync-gap vs. static gaps (fwd)


+AD4-
+AD4-
+AD4----------- Forwarded message ----------
+AD4-Date: Sat, 1 Aug 1998 09:10:53 EDT
+AD4-From: FutureT+AEA-aol-dot-com
+AD4-To: tesla+AEA-pupman-dot-com
+AD4-Subject: Re: 12kV, 30ma TC (42+ACI- sparks),sync-gap vs. static gaps (fwd)
+AD4-
+AD4-In a message dated 98-07-31 22:02:10 EDT, you write:
+AD4-
+AD4APAA8-
+AD4APg- Hi John, All,
+AD4APg-     What would happen if you set the gaps too wide to fire normally and
+AD4APg-triggered them into conduction with an SCR fired ignition coil synched to
+AD4APg- the AC line?
+AD4-
+AD4APg- Barry +AD4APg-
+AD4-
+AD4-Hi Barry,
+AD4-
+AD4-Your idea sounds like it might work well.  It should quench well
+AD4-too, since the gaps would be so wide.  I've never experimented with
+AD4-triggered gaps of any type.  The trigger pulse would have to be short
+AD4-duration so it wouldn't delay the quenching.
+AD4-
+AD4-John Freau
+AD4-