Re: DIY light source for 10X10" enlarger.

"jjs" <jjs.jjs.net> wrote

> So, if I put up to 1000@[EMAIL PROTECTED]
 [sic, watts?] into that head

Seriously -- if you want to control a 1KW head it
isn't any problem.  You will need an auxilliary
contactor - a metal box with a relay in it -
that plugs into the (220V ?) power and the
timer.  You then plug the enlarger into the
contactor box.  Not mine, but:
http://www.largeformatphotography.info/forum/attachment.php?attachmentid=9893&d=1202624791

Darkroom Automation can supply contactor boxes
if you don't want to make your own.

The situation is the same with all timers.
Most giant enlargers have their own electronics
for running the head and the servo motors and also
have their own timer -- in this case the
contactor is built into the enlarger's power supply.

If you have an old HID head or a shuttered head
then the timer connects to the shutter and the
lamp power is a non-issue.

If you are making a custom 1 KW head you may
find yourself involved in making a power supply
for it.  You would then have a contactor as
an integral part of the supply.

If you buy a 1KW stand-alone head it more than
likely has the contactor built into it or the
contactor is an integral part of the head 'kit'.

I am sure you have seen this thread ... Durst 10x10 enlarger:
http://www.largeformatphotography.info/forum/showthread.php?t=32852

-- 
Nicholas O. Lindan, Cleveland, Ohio
Darkroom Automation: F-Stop Timers, Enlarging Meters
http://www.darkroomautomation.com/index2.htm
n o lindan at ix dot netcom dot com