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Home Brew Forums > Home Brewing Beer > DIY Projects > Chillers and Stir Plates > My Stirplate... Cheap and Easy Build...
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Old 03-20-2009, 09:29 PM   #181
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Originally Posted by Anthony_Lopez View Post
Thats for the kind words! As of now, I have replaced my hard drive magnets with ones from K&J Magnetics. They are MUCH stronger and much smaller. I have tested this setup with a 12VDC wall wort and as of last weekend did a .75 gallon starter on it using a 1 gallon glass jug from whole foods apple juice. Worked great!
which magnets di you end up using from K&J Magnetics?
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Old 03-20-2009, 10:03 PM   #182
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If you look at the original post on this thread, I believe I left the link for them.

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Old 03-20-2009, 10:16 PM   #183
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thanks

1.84 for 2 magnets and 5 $ to ship ohh well its only money.

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Old 03-21-2009, 12:21 AM   #184
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I think I paid 10 dollars total for mine... i got 10 magnets + shipping.

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Old 03-23-2009, 05:42 AM   #185
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I've read the whole thread, and plan on building one. I need to get a flask still. Should I get the 1000 or 2000 ml??? Does the stir plate increase the yeast enough to use the 1000 ml?

Thanks.

-Aaron

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Old 03-23-2009, 03:22 PM   #186
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I've read the whole thread, and plan on building one. I need to get a flask still. Should I get the 1000 or 2000 ml??? Does the stir plate increase the yeast enough to use the 1000 ml?

Thanks.

-Aaron
For most normal ales a 1L(1000ml) starter is sufficient. If you plan on doing bigger ales or lagers you might want to look for a larger vessel for starters up to 5L.

That said, you don't have to use a Erlenmeyer flask. Any container with a relatively flat bottom should work. Another member posted pics of a stirplate with a glass apple juice bottle and I've been looking at the 4L wine jugs for bigger starters if I need to.
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Old 03-23-2009, 04:02 PM   #187
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I just built my own stir plate--haven't used it yet, but plan to do so next week. To answer the question above regarding flask sizes, etc.: I'm planning to use a cheap vase that has a flat bottom as the vessel for my starter. It's glass, easily washable/sanitizeable (is that a word?), and best of all, very inexpensive (I probably got it at Wal-Mart a few years back for under $3). I'm planning to put some sanitized aluminum foil over the mouth of the vase to try to keep the nasties out, but loose enought to allow at least a little bit of gas exchange; either that or some saran wrap and a rubber band...

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Old 03-23-2009, 04:26 PM   #188
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Remember for a 1L starter, you need a vessel larger than 1L. I use a 2L flask for my starters, and a 1L flask for culturing.

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Old 03-23-2009, 08:59 PM   #189
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I mocked up my stirplate and something just ain't right. I'm using a 12V power supply with a surplus .2 amp fan. I epoxied a big washer to the hub and am using 2 rare earth magnets, a 2" stirbar, and a 2L flask. So my problem is that it's very difficult to get the stirbar to "catch" and it usually gets thrown. When I can get it to catch the vortex only goes about halfway down the liquid level and certainly isn't the maelstrom of bubbles everyone else seems to have. What's the likely culprit? Magnets? Positioning? Spacing? I have a suspicion that my fan is spinning too fast and isn't torquey enough but would like to hear everyone's thoughts...

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Old 03-25-2009, 12:03 AM   #190
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Another question for you....My power supply doesn't have color coded lines, just 2 braids of copper. Which is which? I seem to remember something about the printing on the outside, but I don't remember. Thanks

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