Re: Aristo cold head

"john" <x@[EMAIL PROTECTED]
> wrote in message 
news:xIGdnR2rW_DX3bPVnZ2dnUVZ_gidnZ2d@[EMAIL PROTECTED]
>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 sup****t rods for the 
bellows?


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Richard Knoppow
Los Angeles, CA, USA
dickburk@[EMAIL PROTECTED]