Large stirplate?

[nduetime]

First time poster here.

I come from another forum based on the recommendation of someone else. I was told that it is believed that a "Doc" has either completed or in the process of completing a larger stirplate. I've searched but haven't really come up with anything. Does anyone know of details or pictures of this device might be laying around on this forum?

[benrota]

How large is large? If you mean one that will work with a 5000ml flask, then I did that with a combination of the instructions here http://onebeer.net/sp_howto.shtml and in the July '07 issue of BYO http://brewyourownstore.com/julyaugust07.html.

If you mean bigger than that, I do remember some discussion on one of the podcasts about building one that could stir a carboy, but I don't remember which one that was...

[filmlabrat]

Oh damn, now I have stirplate envy!

[TimmyR]

On a similar note, based upon what I've read to this point it appears building a stirplate has some trial and error. My questions are

Will the 80mm fan with hard-drive magnet get 3-4 liters os starter moving? (assuming you ge the right POT and can wire it of course)

What is the min-size you'd buy if you had the money and just did not want to deal with building one? Hanna 180M? Hanna 300M? Something else?

[BeerMan]

I built a double stir plate using 2 computer cooling fans and hard drive magnets in a single wooden box on one 12V transformer it will stir two 1 gallon starters with no problem but you will want a 1 1/2 to 2 inch stir bar. When I first assembled it I installed 1 new and 1 used fan. They were out of balance if I turned up the power to to get the used fan to stir a large starter the the new one would toss the stir bar off the magnet, easy fix replaced the used fan.