RE: Xenon Short Arc Igniter Help? (fwd)

["High Voltage list" <hvlist@xxxxxxxxxx>]

Original poster: <sroys@xxxxxxxxxxxxxxxxx>



---------- Forwarded message ----------
Date: Sun, 13 Feb 2005 21:33:34 -0800
From: Dave Halliday <dh@xxxxxxxxxxxxxx>
To: 'High Voltage list' <hvlist@xxxxxxxxxx>
Subject: RE: Xenon Short Arc Igniter Help? (fwd)

Go to a one-hour photo place and ask them for some carcasses of
disposable cameras.

I have had no problem getting five or ten for free.

They have flash circuits and the wiring is pretty easy to trace.  Break
out the switch on the shutter to a "firing button" and you should be
good to go.

> -----Original Message-----
> From: High Voltage list [mailto:hvlist@xxxxxxxxxx] 
> Sent: Sunday, February 13, 2005 7:44 PM
> To: hvlist
> Subject: Re: Xenon Short Arc Igniter Help? (fwd)
> 
> 
> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
> 
> 
> 
> ---------- Forwarded message ----------
> Date: Sat, 12 Feb 2005 10:01:06 -0700
> From: robert heidlebaugh <rheidlebaugh@xxxxxxxxxxxxxx>
> To: High Voltage list <hvlist@xxxxxxxxxx>
> Subject: Re: Xenon Short Arc Igniter Help?
> 
> Xenon flash lamp trigger coils are made to fire photo flash 
> lamps and strobe
> lamps many photo labs can supply old camera flash assemblies 
> or you can
> order just the trigger coil for under $5 and power then off 
> line voltage.
> They produce a 3000 v trigger voltage,
>    Robert  H
> -- 
> 
> 
> > From: "High Voltage list" <hvlist@xxxxxxxxxx>
> > Date: Thu, 10 Feb 2005 22:05:30 -0700 (MST)
> > To: hvlist <hvlist@xxxxxxxxxxxxxxxxx>
> > Subject: Re: Xenon Short Arc Igniter Help? (fwd)
> > Resent-From: hvlist@xxxxxxxxxx
> > Resent-Date: Thu, 10 Feb 2005 22:05:32 -0700 (MST)
> > 
> > Original poster: <sroys@xxxxxxxxxxxxxxxxx>
> > 
> > 
> > 
> > ---------- Forwarded message ----------
> > Date: Wed, 09 Feb 2005 14:18:13 -0800
> > From: Jim Lux <jimlux@xxxxxxxxxxxxx>
> > To: High Voltage list <hvlist@xxxxxxxxxx>
> > Subject: Re: Xenon Short Arc Igniter Help? (fwd)
> > 
> > At 12:53 PM 2/9/2005, you wrote:
> >> Original poster: <sroys@xxxxxxxxxxxxxxxxx>
> >> 
> >> 
> >> 
> >> ---------- Forwarded message ----------
> >> Date: Tue, 8 Feb 2005 21:21:39 -0500
> >> From: Charles Brush <cfbrush@xxxxxxx>
> >> To: High Voltage list <hvlist@xxxxxxxxxx>
> >> Subject: Xenon Short Arc Igniter Help?
> >> 
> >> Hi everyone,
> >> 
> >> I have a 750w xenon short arc aviation lamp that I bought on ebay a
> >> few months ago, and I am trying to piece together a power 
> supply for
> >> it.  The lamp requires about 41 amps at 18 volts DC, so I thought a
> >> small DC arc welder might make a good supply for it.  
> There are some
> >> pretty cheap inverter models that are very light, and have
> >> continuously variable current.  The problem is what do I use as an
> >> igniter circuit to initiate the arc?  I gather about 30kV is
> >> required, and building some simple flyback kinda thing wouldn't be
> >> hard.  What I don't quite get however is how I'd keep the HV out of
> >> the rest of the power supply.  it just has to initiate the arc and
> >> then isolate itself.  Any comments or suggestions would be quite
> >> welcome, and if anyone here has used short arc lamps I'd 
> love to hear
> >> your experiences.  I am well aware of the hazards of these kinds of
> >> lamps and will take full precautions (I have also been collecting
> >> antique carbon arc lamps for years...as well as building big Tesla
> >> coils and other fun things).  Thanks for reading this post!
> > 
> > I think these things work by using a saturable core inductor in
> > series.  You couple the HV pulse in series with the lamp, 
> (the inductance
> > of the saturable core keeping the HV from being shorted by 
> the low output
> > impedance of the LV power supply), then when the lamp 
> strikes, the current
> > shoots up, the core saturates, and goes to low impedance.
> > 
> > 
> > 
> > 
> > 
> 
> 
> 
> 
>