Note: OP was with a smartphone, I didn't have internet on my pc until ~30 min ago... ISP is phail.
You'll need to limit the size of your base/extension to fit within the size constrains of whatever HW you want to use the pot with.
I want to make them to sell them, So I want them to fit anything.
I just found intel's datasheets, and I have one from ASrock for the AM3 holes, and AMD's are all mounted the same, right?
If so, I should be good
So, On to design..
I've read what articles about LN2 pots that I could find, and done my own designing and math to come up with what I have. But I'm not designing the pot for my own hardcore use, and I want to get input from those who have much more experience freezing CPU's.
Here are a few things I'd like to ask:
What Diameter temperature probe do most people use? Mine is .184 inches, notably larger than most.
If you were to recommend a size to make the most people happy, what would it be?
How much is enough?
My Design in progress has 3.8 Pounds of copper, and ~1 LB of aluminum in the lower part of the base (I didn't count the walls in my calculations, I figure they don't matter as much)
I can add more copper mass (with little impact to surface area) but It would make it more expensive in material.
Should I aim for more mass, or... what is the preference?
(I haven't done any LN2 benching yet. Only dice. Seeing as my HW store doesn't carry LN2
(I could put in a PO with A&L gasses, But I dont have a dewar, or the money for one anyway))
Does Too much hurt? Or should I make it as much as possible?
I'll provide exact figures for my design later.
I Intend to make universal mounting brackets (using the prints mentioned above), one goes on the pot and and goes underneth. Same as my dry ice pot.
Does anyone think that would be inconvenient for whatever reason?
(Those hex pieces slide on, and the setscrew in the side lets you lock them, then you can use them to screw the rods into the backplate. I personally really liked the setup, I could feel and torque each of the 4 corners just the way i wanted)
How much LN2 should a good pot hold? ATM the design holds ~2.5 cups (leaving 2.5 inches of tube unfilled) but all I have to do is increase the length of my aluminum tube to increase that.
Attachment of the tube:
At the moment the tube that goes on top Is interference-fit, which means anything short of a sledge hammer or hydraulic press couldn't remove it. (Someone told me these come apart when it gets cold, and some pots have failed because of it. I see how a poorly done Press-fit would come apart at LN2 temps. But not a strong interference
fit, with equal cross-sections in the two parts.)
Would a permanent top be an issue for some reason?
If it might be, I could put in a tight thread, but it would take a lot longer to make the pot.
The Shortest cross-section between the LN2 and the processor would be .625" in my current design Does this sound acceptable, too thin, or too thick?
Does this look good
I am going to be using a square base again (works well for mounting, both at the mobo and in my machine). The tube isn't going to be so thick, though. (Bigger OD, thinner walls, inside NOT done with a cheap ass chinese boring bar that flexes .5 over 4 inches!)Those aren't scratches, it's frost! If I make pots to sell they are going to be very well finished. Scratches, chip indents, use of mechanical abrasives... ALL inexcusable!
If anyone feels like commenting on these aspects of the design, or pointing me to resources, I'd much appreciate it.