Saturday, October 16, 2010


I finally own a magnetic stirplate. It was about time. As I usually use yeast from my yeast bank, starters can get quite big without a stirplate.Take my last beer for example. Without a stirplate, I would need 3.5 l starter, with a stirplate 1.3. Not only are smaller starters easier, they are also cheaper, you need less malt extract. Commercial stirplates tend to be quite expensive, as they are made to stir big volumes on a daily base. For my purposes, I decided a home-made version would be good enough. So, I went to the local electronics store and bought a box, a 12V fan, a few rare earth magnets, a contact and a potentiometer. All together less then 250 Swedish kronor (25€, 35$). Maybe not as durable as a commercial stirplat, but it works. Here's the result stirring a 100 ml starter, but it's capable of stirring starters up to 1 liter.


Bazinga Brewery said...

What was the size of your last brew, the one that needed the 1.3L starter? As you know, I'm thinking about building one of these myself and I'm trying to figure out what effect my stirrer will need (aka how big starters will I have to make).


Maarten said...

Hi Sofie,

Sorry for my late reply. I make eithet 20 l or 40 l batches. For that a 1.3 liter starter usually is not enough, but when I need more I let the yeast sediment and pith it in 1,3 l starter untill I have enough yeast.

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