Tight Arse Stir Plate

[Gulf Brewery]

Thanks ausdb
I saw them on the JayCar website , a bit expensive I think....someone quoted a price way under that.

Am I correct here or should I expect to pay this?

http://www1.jaycar.com.au/productView.asp?...eMax=&SUBCATID=

Batz

[post="54992"][/post]​

Batz

Look at the one I made (link in this thread somewhere) and I used 2 x bar magnets and glued them together. They work OK, but I haven't tried rare earth ones to see if they are better.

Cheers
Pedro

 

[Batz]

OK
Checkout Aussiemagnets


http://www.aussiemagnets.com.au/Merchant2/..._Code=RareEarth

Batz

 

[PostModern]

Old Hard Disk Drives have rare earth magnets. If you've got one sitting around in your spares cupboard they're a great source.

 

[Plastic Man]

These guys are selling out some rare earth magnets. 55c for the 7mm a 3mm.

http://www.oatleyelectronics.com/items.html

 

[Hoops]

OK
Checkout Aussiemagnets


http://www.aussiemagnets.com.au/Merchant2/..._Code=RareEarth

Batz

[post="54994"][/post]​

I reckon the 10mm x 5mm would be the go.
If anyone else in Brisbane wants some maybe do a order together?

Hoops

 

[quincy]

I am just about to start yeast farming. The other challenge for me will be starters as up until now I have not used them or just dumped the next brew straight in on top of a previous trub.

Up until this morning I didn't even know that a "stir plate" existed.

Now I have read through all this and the related links I have concluded that I need one!!

Could I start out with a 100ml starter in say a 2litre flask, set up on a stir plate and continue to step it up (over the next 24-48 hrs) to a final volume of say 1 litre while it continues to stir?

Cheers

 

[JasonY]

Hey Sosman, any plans to bung the stirer in a fermenter! h34r: would be interesting to see what 20L of wort would get up to with a couple of days help from this. I am sure you wouldn't get anywhere near the turbulence you get in the flask but perhaps some potential?

 

[jgriffin]

Hey Sosman, any plans to bung the stirer in a fermenter! h34r: would be interesting to see what 20L of wort would get up to with a couple of days help from this. I am sure you wouldn't get anywhere near the turbulence you get in the flask but perhaps some potential?

[post="55036"][/post]​

I was thinking the same thing but wasn't game to ask

 

[Gulf Brewery]

Hey Sosman, any plans to bung the stirer in a fermenter! h34r: would be interesting to see what 20L of wort would get up to with a couple of days help from this. I am sure you wouldn't get anywhere near the turbulence you get in the flask but perhaps some potential?

[post="55036"][/post]​

I was thinking the same thing but wasn't game to ask

[post="55037"][/post]​

I was thinking the same thing but I'm not game to try it
The loss from foaming would be quite high

Cheers
Pedro

 

[dicko]

How about a 25litre brew in a 60litre fermenter?

or

Only turn it on for a short time?

Cheers

 

[Batz]

On a timer

Mix every hour for 5-10 min. ??


Batz

 

[Gulf Brewery]

Could I start out with a 100ml starter in say a 2litre flask, set up on a stir plate and continue to step it up (over the next 24-48 hrs) to a final volume of say 1 litre while it continues to stir?

[post="55031"][/post]​

Quincy - the only hassle with this is that 100ml doesn't give a lot of depth in a 2 litre flask. Mine is full at the moment, so I can't try it. I think it is better with at least 250ml in the 2 litre flask.

How about a 25litre brew in a 60litre fermenter?
or
Only turn it on for a short time?
Cheers

[post="55086"][/post]​

On a timer
Mix every hour for 5-10 min. ??
Batz

[post="55088"][/post]​

Yep, both possible. The hassle with 25 litres in a 60 litre fermenter is that you won't be able to see the stir bar at the bottom. If it gets off centre, it would be a pain trying to get it back again. Also, the fermenter would need a dead flat spot in the middle.

Once the trub and yeast starts to floc as well, you won't be able to turn it with a fan motor / magnet combo. I know with mine, the fan goes a lot faster without a stir bar to move. I have had the yeast that thick at the bottom of a flask, that the motor could not turn the stir bar.

Cheers
Pedro

 

[sosman]

Hey Sosman, any plans to bung the stirer in a fermenter! h34r: would be interesting to see what 20L of wort would get up to with a couple of days help from this. I am sure you wouldn't get anywhere near the turbulence you get in the flask but perhaps some potential?

[post="55036"][/post]​

Well not unless I use one of these:

 

[sosman]

Guys I have no doubt that the stir plate will improve yeast yield but please don't get too carried away with yeast that this trial yielded. Quite a bit of yeast went into the mix at the start, even though it was of quesionable viability. It had been in the fridge under beer for about 6 weeks.

 

[JasonY]

Once the trub and yeast starts to floc as well, you won't be able to turn it with a fan motor / magnet combo. I know with mine, the fan goes a lot faster without a stir bar to move. I have had the yeast that thick at the bottom of a flask, that the motor could not turn the stir bar.

Holy sh@t sosman, you wont have any torque problems with that baby. Just watch the yeast don't crawl out and murder you in the night. Look forward to seeing the inevitable explosion. Just make sure it doesn't burn a hole in the fermenter! h34r: h34r: h34r: :beerbang:

 

[sosman]

Maybe a coffee plunger pot would be suitable as a flat bottomed flask. So long as you are happy with the covering of some aluminium foil.

[post="54988"][/post]​

The vessel doesn't have to be glass. The thin SS such as found in cheap stock pots will work ok (I tried it). You just have to manage sanitation as the wider the mouth, the more chance you have of contaminants blowing in.

 

[sosman]

Has anyone found a good place to buy the rare earth magnets?

[post="54989"][/post]​

Batz I bought my 12x5mm from Alpha Magnetics for 75c each.

 

[Hoops]

Great stuff Sos.
Just spoke to the guy from Alpha Magnets and he said that they are not supposed to send the rare earth magnets through the mail, and normally courier bag them.

The 12x5mm are 75cea + GST
The 12x10mm are $2ea + GST

Courier bag is $12+ GST and will fit about 50 magnets.

Who in Brisbane is interested in getting a few?

Got a few quotes for erlenmeyers, will get a few more and post them tonight.

Hoops

 

[ausdb]

Hi Batz

Here are the details of the magnet place in Perth, I said I would post the other day

MAGIC FORCE
U 25/ 70 Roberts St Osborne Park 6017 (08) 9201 1655

 

[Doc]

What a shame these guys aren't in Australia. Min order $100 though.
Talk about being specialised :lol:

Doc