Stir Plate

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Stir Plate

Postby redtail28 » Sun Jan 20, 2008 10:00 pm

I've been playing with a stir plate that I made. It works real good with the
Small stir bars if you don’t spin it too fast. I'm using an old gallon wine
Jug for the test. The bottom of the jug is round so getting it stated
Takes practice. Here's a parts list.

120v fan
Light dimmer switch
2 magnets from lows
Old wood
And wood screws and
Hot glue

The only thing that I had to buy was the dimmer switch for $ 8.
I went wider on the box so I can add a second fan one day.
The test that I’m running is with the long stir bar and 3/4
Of a gallon of water, and the dimmer switch on high. It's pulling a good
Vortex. Here are some pictures I have cork for the top not on yet
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Postby triple-oh_six » Sun Jan 20, 2008 10:34 pm

Looks good. I've been thinking of making one myself. Right now I have a starter sitting motionless, poor yeasties, but tommorrow they dine on amber ale wort.
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Postby redtail28 » Sun Jan 20, 2008 10:41 pm

Good luck
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Postby GuitarLord5000 » Sun Jan 20, 2008 11:11 pm

I made a similar one a few months ago. I have to say, the last yeast starter I made performed quite a bit better on the stirplate than any of my previous starters. Its a good idea and cheap too. I actually had all the parts lying around my house. Its well worth the build, as a commercial one goes for 80 bucks and up.
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Postby yeastmeister » Mon Jan 21, 2008 7:28 am

I started out with those 1 gallon jugs myself. The bottom is just entirely too round to get a decent stirring action going. The thickness of the glass and the bottom just don't hold the bar well enough. Once the yeast gets active, the solution gets much thicker.

Eventually, I wound up getting a 5000ml flask from morebeer that works incredibly well. I can get a gallon of starter stirring in that thing if I really want to.

Mine are commercial and heated, but I started out with non-heated ones. Depending on where your starters are, you may find it helpful to insulate them in this weather. My stir plates are downstairs in my brewery which I don't heat (heat and beer, bad....), if I don't heat or insulate them in the winter, they just don't grow as fast as they should.
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Postby redtail28 » Mon Jan 21, 2008 9:40 am

Fun that you said More Beer! I ordred a 5000 ml flask, stainless steel diffusion stone and a sanitary inline filter for O2 last week.
Also I found this web site that has all kinds of stir bars. They carry one that is shape like a dumbell for jars with curved bottoms. The site is

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Postby aleguy » Mon Jan 21, 2008 1:38 pm

I've never had a problem with still starter... yet. but i'm a little concerned that if you drink too much beer made from a stir-plate starter you will get dizzy and fall down.
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