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Old 01-31-2011, 04:30 AM   #501
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You don't need a vortex for this. You just need to keep the yeast in suspension. The 9v power supply will work for this. On one of mine I'm using a 5v power supply with a 1 liter flask. It has little to no vortex and makes lots of good yeast.
I noticed in other peoples that it goes far down and when it reaches the stirplate it kicks up bubbles. I thought that's what I was shooting for? So even if it only goes down only 1 inch and is about 5 inches from the stirplate that will still work?
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Old 01-31-2011, 04:53 AM   #502
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I noticed in other peoples that it goes far down and when it reaches the stirplate it kicks up bubbles. I thought that's what I was shooting for? So even if it only goes down only 1 inch and is about 5 inches from the stirplate that will still work?
Yes...the objective is to move the yeast to the "food". I have had no problems with getting activity within a few hours due to no HUGE vortex. By just disturbing the surface of the liquid you should get enough oxygen transfer to support ludicrous propagation of yeaties
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Old 01-31-2011, 11:17 AM   #503
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Yes...the objective is to move the yeast to the "food". I have had no problems with getting activity within a few hours due to no HUGE vortex. By just disturbing the surface of the liquid you should get enough oxygen transfer to support ludicrous propagation of yeaties
I wish I didn't cut my old power supply...no I have to rewire it again! I added a power connector that the 12v supply came with so I'll just have to wire the 12v connector to the 9v supply. As long as it works I'm happy, although the big vortex would make me happier.
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Old 01-31-2011, 11:52 AM   #504
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Has anyone had any luck using a 1 gallon growler on this stir plate? If so, what size of stir bar are you using?

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Old 01-31-2011, 11:58 AM   #505
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I wish I didn't cut my old power supply...no I have to rewire it again! I added a power connector that the 12v supply came with so I'll just have to wire the 12v connector to the 9v supply. As long as it works I'm happy, although the big vortex would make me happier.
You may also want to play with the magnet location a little too, if your throwing the stir bar it could be because it's not centered quite right.
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Old 01-31-2011, 02:51 PM   #506
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I fill my 2 liter flask all the way to the where the neck begins with no problem.


you know it's best not to fill your flask to more than about 3/4 of its listed volume, right? with it that full your surface area to volume ratio is very small and you likely aren't getting as much oxygen to your yeast as they could use
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Old 01-31-2011, 03:41 PM   #507
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you know it's best not to fill your flask to more than about 3/4 of its listed volume, right? with it that full your surface area to volume ratio is very small and you likely aren't getting as much oxygen to your yeast as they could use
Naah...IMO, the continuous stirring takes care of that issue. Wort is exposed to the surface and exchanged very rapidly. I am convinced that the yeast get all of the oxygen they need regardless of the fill level so long as the wort is stirred continuously.
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Old 01-31-2011, 03:51 PM   #508
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Yes...the objective is to move the yeast to the "food". I have had no problems with getting activity within a few hours due to no HUGE vortex. By just disturbing the surface of the liquid you should get enough oxygen transfer to support ludicrous propagation of yeaties
+1. That's all you need.
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Old 01-31-2011, 03:58 PM   #509
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you know it's best not to fill your flask to more than about 3/4 of its listed volume, right? with it that full your surface area to volume ratio is very small and you likely aren't getting as much oxygen to your yeast as they could use
The only problem with filling up the flask more than 3/4 full is a lot of krausen coming out from under the aluminium foil cover onto the counter top, and having your wife tell you that your beer stuff is making a mess on the counter.
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Old 01-31-2011, 04:00 PM   #510
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Has anyone had any luck using a 1 gallon growler on this stir plate? If so, what size of stir bar are you using?
I'm using a 1 inch stir bar with my 1 gallon growler. I tried a 2 inch one, but could not get it to work.
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