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Memo: Re: Strobe switching circuit.

Subject: Memo: Re: Strobe switching circuit.
From: Peter J BARWICK <peter.j.barwick@hsbc.com>
Date: Thu, 4 Jan 2001 15:32:34

Steve,

I had a look at the Aeroflash web site where it says that the power
supplies provide 450 volts dc to a capacitor which is parallel to and
discharged through the xenon flash tube when it is triggered.  This
raises a few issues:-

-  you could end up with both tubes in parallel with the one capacitor
leading to odd timing or even neither of the tubes working.

-  the power supply will probably be some sort of inverter circuit
which will only draw a small residual current once the capacitor is
charged up, so the current saving will be limited.

-  there is a definite time lag between the xenon tube flashing and
the capacitor re-charging for the next flash.  There may not be enough
time to get to 450 v before the other tube is triggered.

-  you will end up with long cable runs with 450 volts on them (even
when everything is switched off) - cannot be too safe!

-  with removable wings, these long cables need to have some plugs and
sockets involved.  Again with 450 volts on them, assembly/disassembly
could be hazardous.

All in all, I would suggest that you do not pursue this idea.

Regards,
Peter Barwick


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