From: Rod Fleming (rodfleming@sol.co.uk)
Date: 05/05/00-09:39:41 AM Z
Hi
----- Original Message -----
From: Tom Ferguson <tomf2468@pipeline.com>
To: <alt-photo-process-l@skyway.usask.ca>
Sent: 05 May 2000 15:12
Subject: Re: Gum prints by enlargement
>All the paper was fogged that night, apparently
> from the small number of 2000WS flashes from across the large room.
>
> So, bottom line: It might work. But, you want a brute force high output,
> cheap (simple clear glass tube) head. Let us know what you find.
>
> P.
First, folks, a word on safety; the power capacitor in even the simplest
little disposable camera packs plenty enough wallop to kill an adult human
stone dead, and the caps in a "brute force high output" unit- hey, nice
hairdo!!! So be very careful.
Having said that, DIY freaks might care to have a look at this here site
here
http://www.misty.com/~don/donflash.html
In which Don Klipstein- who clearly is of the stuff the Wright brothers were
made of- tells you all you need to know to make truly intergalactic strobe
flashes.
However, the source I'd want to investigate- if I was not happy with the
sun, which admittedly we Scots don't see too much of- would be carbon arc.
This is really heavy on UV and requires the application of a continuous
voltage across the gap between two carbon electrodes (anybody have an old
WW2 anti-aircraft searchlight unit around?) You'd have to mount it remotely
because of the heat, and use a condenser system to collimate the light, and
have very efficient cooling, but I'm pretty sure it would work all right. A
basic version could be designed using a small hobby type arc welder -say 120
to 150 amp- fitted with a carbon arc brazing attachment. Remember to wear
plenty of sun screen......
Rod
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