[LargeFormat] darkroom horrors (was philosophy)

[Les Newcomer]

Brock,

Amusingly, not pictured is the stainless steel sinkline with the heated 
water jacket. I bring it in through the thermostatically controlled 
Lawler valve (Chrome body that divides the copper into left (unfiltered) 
and right (filtered and flow controled)) by looking at the faucet and 
tapping the thermometer. The valve is supposed to keep constant temp of 
the water coming in.  once the tempered water is in the water jacket.
Now I suspect once up to temp and at rest,  the 18-20 gallons of liquid 
would have a fairly long cooling period. But as I said before, I'm a 
compulsive over engineer and I found a Calumet heated recirculating pump 
cheap that should keep the chemicals fairly constant over a 4 or 5 hour 
period.  It uses 110 rather than Plutonium, the Plutonium may be cheaper 
in the long run, but the AC doesn't fog the film like the surplus 
Russian 236.

The Thermostatic valve I salvaged out of the lab at the old JD Power 
building in Detroit before it came down.

I've had it for ten years and never hooked it up, but I have to say for 
the amount of frustration in leaks and the cost of the rebuild kit, I 
would have bought an Intellifaucet in a heart beat.
On Friday, March 22, 2002, at 11:49 PM, Brock Nanson wrote:

> | for the curious, the stainless steel box with the dial in the upper 
> left
> is
> | the Nitrogen control,  the black box is my process timer from 
> heathkit (no
> I
> | didn't build it, never could get a switch to work from Heathkit, got 
> it at
> | an auction) It can be programed for several times in a sequence which 
> is a
> | big help when your hands are full of stainless steel and silver 
> nitrate.
> The
> | last mystery box on the right controls the odd gray angle thingy near 
> the
> | filter. That goes to both the film and print washer and allows me to 
> time
> | the water as well as control the rate of flow.  Those parts came from 
> Rain
> | bird, Radio Shack and some cast offs from an auction.
>
> That's all very fine, I can follow the description.  But what I can't 
> work
> out is where the cooling water from the reactor core comes in...?
>
> Seriously though, do you have a means of controlling temperature 
> (besides
> looking at the thermometer and tapping the faucet)?
>
> I can see I should have patented my idea of mounting everything on a 
> piece
> of plywood so as to allow mechano-tinkering and reasonable portability!
>
> Brock
>
>
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