Re: Aristo cold head


"john" <x@xxxxx> wrote in message
news:xIGdnR2rW_DX3bPVnZ2dnUVZ_gidnZ2d@xxxxxxxxxxxxxxxx
I know nothing about cold heads (except being bald in a
Minnesota Winter).

Need something for the 8x10 Saltzman enlarger. On EvilBay
there is an Aristo T12.

Seller wants $575 BIN. Here is the ad copy:

"This is the top-of-the-line 8x10 enlarger light source.
Aristo T12 High Intensity Light Head is a two part
unit -lamp housing and power pack- which contains a three
prong thermo cord which operates the thermostatically
controlled heater. This is plugged into any available 115V
outlet. The lamp housing is 11-7/8" x 11-7/8" x 6-3/4"
high."

Is that everything I need for the light source? Is there a
particular "gotcha" to beware of?

I truly appreciate any help on this you all can offer.

John

Others have answered your questions but contratulations
on having this monster, an absolutely superb chunk of
machinery.
If you have the original shutter it will work well with
the cold light head, they want to run continuously. The
Arista has a heater in it to make the output more uniform
when its used intermittantly but all gaseous discharge lamps
increase output as they get hotter and most like to work on
a continuous basis. The Saltzman shutter was made to work
with the original mercury vapour lamp house which _had_ to
run continuously. Saltzman had other lamphouses available
but the Cooper-Hewitt tube type was the most common.
Arista makes lamps which are compatible with variable
contrast paper and can be refitted to older lamphouses.
Does your Saltzman have one or two support rods for the
bellows?


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Richard Knoppow
Los Angeles, CA, USA
dickburk@xxxxxxxxxxxxx


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