Get your HBT Growlers, Shirts and Membership before the Rush!


Home Brew Forums > Home Brewing Beer > DIY Projects > Chillers and Stir Plates > Looking into making DIY stir plate for 10gal batches
Reply
 
LinkBack Thread Tools
Old 10-04-2012, 05:51 PM   #1
austinb
Feedback Score: 0 reviews
Recipes 
 
Join Date: May 2007
Location: Portland, OR
Posts: 247
Liked 12 Times on 10 Posts
Likes Given: 1

Default Looking into making DIY stir plate for 10gal batches

Hi. I am thinking about making a stir plate to improve yeast cell count before pitching. Most of the directions I am seeing are talking about 1 liter starters. However, I brew 10 gallon batches so I was wondering if I should be making 2 liter starters instead? If i'm making 2L starters should I use a bigger fan than 80mm? 120mm seems to be the most common size above 80mm, would 120mm be too big? Also what size stir bar should I use for 2L? I saw 1" recommended for 1L starters so should I double it to a 2" stir bar? Thanks.

__________________
austinb is offline
 
Reply With Quote Quick reply to this message
Old 10-04-2012, 07:27 PM   #2
OMJ
Feedback Score: 1 reviews
Recipes 
 
Join Date: May 2009
Location: Camp Hill, PA
Posts: 582
Liked 18 Times on 13 Posts
Likes Given: 4

Default

I use the stir plate from this thread http://www.homebrewtalk.com/f51/my-s...y-build-86252/ and have no problem with starters of 2 or 3 liters.

__________________
OMJ is offline
 
Reply With Quote Quick reply to this message
Old 10-04-2012, 07:43 PM   #3
BBL_Brewer
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
BBL_Brewer's Avatar
Recipes 
 
Join Date: Feb 2011
Location: Kokomo, IN
Posts: 3,701
Liked 429 Times on 297 Posts
Likes Given: 323

Default

If you want to make larger starters, you can use gallon glass jugs instead of flasks. I have six stir plates and use jugs for all of them. Some people have problems with the stir bar being thrown since the bottoms are usually domed, but if you get your magnet heights adjusted right and use a stir bar with a pivot ring, you shouldn't have any problems. Jugs are a lot cheaper than a 3 or 4 liter flask.

__________________
Slots Down Brewery
Stick with the plan....not the sparge.


Never Ending Liquid Yeast - How to Farm Yeast and Freeze it.

BBL_Brewer is offline
 
Reply With Quote Quick reply to this message
Old 10-05-2012, 06:53 PM   #4
SweetSounds
Feedback Score: 1 reviews
Recipes 
 
Join Date: Jan 2010
Location: Des Moines, Iowa
Posts: 1,429
Liked 19 Times on 18 Posts
Likes Given: 4

Default

I have a 2l flask on my DIY stir plate with a 1" stir bar.

It works just fine, and I've made a 1/5l starter with it.

Posted myne here: http://www.homebrewtalk.com/f51/gloc...4/#post4418241

__________________
Quote:
Originally Posted by Ecnerwal View Post
What does the primary pressure gauge on the tank tell us? That's right, the temperature. Put it on a scale if you want to know how much is in it...
Put some duct tape over the gauge - Or better yet - Replace the high pressure gauge with a plug - High pressure gauges are useless!
SweetSounds is offline
 
Reply With Quote Quick reply to this message
Old 10-05-2012, 09:06 PM   #5
davepeds
Feedback Score: 0 reviews
Recipes 
 
Join Date: Feb 2012
Location: Oklahoma City, Oklahoma
Posts: 94
Liked 1 Times on 1 Posts
Likes Given: 2

Default

Quote:
Originally Posted by BBL_Brewer
If you want to make larger starters, you can use gallon glass jugs instead of flasks. I have six stir plates and use jugs for all of them. Some people have problems with the stir bar being thrown since the bottoms are usually domed, but if you get your magnet heights adjusted right and use a stir bar with a pivot ring, you shouldn't have any problems. Jugs are a lot cheaper than a 3 or 4 liter flask.
Let me holler at you on this one - because this is exactly what I'm struggling with. I have a little fan off amazon as suggested by another man on here. I have glued magnets to this thing that move my 1" stir bar and lock onto it when the unit is still. But, once I get the fan going on lowest setting, the bar (with a pivot ring) either rattles and doesn't spin or it flies off center to the side.

I cant get it working. What do you mean by magnet height? I moved the magnets up away from the fan by separating them with a plastic (empty) tea candle holder. Still no love.

Anybody have issue or concerns about me using those little uber-strong Bucky ball magnets IN the starter? They're metal, so I feel like I could easily sterilize and clean them by boiling them or soaking in sanitizer. I'm just a little nervous about having little metal balls, that certainly look shiny and stainless, being in the yeast starter spinning their balls off.
__________________
davepeds is offline
 
Reply With Quote Quick reply to this message
Old 10-05-2012, 10:20 PM   #6
BBL_Brewer
HBT_SUPPORTER.png
Feedback Score: 0 reviews
 
BBL_Brewer's Avatar
Recipes 
 
Join Date: Feb 2011
Location: Kokomo, IN
Posts: 3,701
Liked 429 Times on 297 Posts
Likes Given: 323

Default

Quote:
Originally Posted by davepeds View Post
Let me holler at you on this one - because this is exactly what I'm struggling with. I have a little fan off amazon as suggested by another man on here. I have glued magnets to this thing that move my 1" stir bar and lock onto it when the unit is still. But, once I get the fan going on lowest setting, the bar (with a pivot ring) either rattles and doesn't spin or it flies off center to the side.

I cant get it working. What do you mean by magnet height? I moved the magnets up away from the fan by separating them with a plastic (empty) tea candle holder. Still no love.

Anybody have issue or concerns about me using those little uber-strong Bucky ball magnets IN the starter? They're metal, so I feel like I could easily sterilize and clean them by boiling them or soaking in sanitizer. I'm just a little nervous about having little metal balls, that certainly look shiny and stainless, being in the yeast starter spinning their balls off.
What I mean by magnet height, is how close the magnet is to the bottom of the container. Since the magnet is glued to the fan (same as in my case) I guess that really means you have to adjust the position of the fan. I had to play around with mine to get the magnets in the perfect spot. I mounted my fans on bolts so that I could easily adjust them until I found the sweet spot. That was almost three years ago and I haven't had to make any more adjustments since.
__________________
Slots Down Brewery
Stick with the plan....not the sparge.


Never Ending Liquid Yeast - How to Farm Yeast and Freeze it.

BBL_Brewer is offline
 
Reply With Quote Quick reply to this message
Old 10-06-2012, 04:25 AM   #7
rtrevino
HBT_SUPPORTER.png
Feedback Score: 4 reviews
 
rtrevino's Avatar
Recipes 
 
Join Date: Apr 2008
Location: San Antonio, Texas
Posts: 413
Liked 4 Times on 4 Posts
Likes Given: 3

Default

A 2L starter for a 10 gallon batch sounds a little low. I brew 10 gallon batches and use Mr Maltys iPhone app to calculate the starter volume, and on the last batch of AHS Blue Moon the app calculated a starter batch of 4 billion cells need. Next there is a book titled yeast and in it there is a recommended yeast starter chart http://multimedia.billybrew.com.s3.a...able-large.jpg, using this chart I did a 4 liter starter with 2 vials of white labs in a gallon jug on the stir plate for 24 hours and then cold crashed the starter. I decanted the liquid and filled the jug with the cooled wort, put it back on the stir plate for a few minutes to stir up the sleeping yeast and pitched the whole thing into the 9 gallons of cooled/Oxygenated wort, 48 hours later it was had almost fermented out.

This is the same process I use each time I brew no matter what the volume is and my DIY stir plate has been able to handle all of the starters.

__________________
Side By Side Kegerator and Fermentation Chamber Build
rtrevino is offline
 
Reply With Quote Quick reply to this message
Old 10-10-2012, 01:00 AM   #8
SloTimes
Feedback Score: 0 reviews
Recipes 
 
Join Date: Oct 2011
Posts: 39
Default

I tend to use this calc. Its nice for stepped starters.

http://www.yeastcalc.com/

It says that for 10 gal of 1.060 wort youre going to need 418 Billion cells, a two liter starter on a stir plate will get you at a max with day one fresh yeast 310 billion cells. If youre doing 10 gal batches I second the gallon jug idea if you want to save money. I went that route at first because a gallon of carlo rossi wine in a glass jug was 8 bucks at my local grocery store. I got a glass jug and my friends drunk fir 8 bucks..not a bad deal. That worked for a while but after a while I wanted to be able to heat it on the stove and then transfer the container directly to an ice bath to chill it.. so borosilicate glass i went. Luckily my LHBS has 5L erlenmeyer flasks for $35 bucks.

Now to stir that sucker my little 12v pc fan made into a stir plate wasnt gonna cut it. It would throw the magnet before I could get it spinning and on the rare occasion it didnt throw the mag it just couldnt spin the starter wort fast enough to make a vortex.

So I upped the ante. I bought a 120V muffin fan on ebay (~$15 shipped), ceiling fan speed control from HD (~$10), some strong rare earth magnets from an online retailer (~$5 shipped), cannibalized an extension cord I had, and built the box out of some old scrap wood. Now that stir plate with a 1in stir bar with a pivoting ring with throw the starter wort in my 5l flask like nobodys business.. im pretty sure I could put a large vortex in my carboy if i ever felt the need

__________________
SloTimes is offline
 
Reply With Quote Quick reply to this message
Reply



Quick Reply
Message:
Options
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dramatically improve your Stir Starter stir plate wildwest450 Chillers and Stir Plates 27 03-24-2012 01:05 AM
DIY stir plate keeps throwing stir bar. blawjr Chillers and Stir Plates 11 11-02-2011 05:53 PM
Good excuse for the wife for making stir plate rtrevino Chillers and Stir Plates 2 10-17-2011 03:05 PM
DIY Stir Plate, Stir Bar attracted to mounts littlejon326 Chillers and Stir Plates 5 03-13-2011 03:12 PM
Stir Plate w/ Stir Rod in Boil Kettle resslerk Chillers and Stir Plates 6 03-20-2010 08:10 PM



Newest Threads

LATEST SPONSOR DEALS