HOMEBREW Digest #5934 Fri 06 April 2012

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  Re: Question about mash yield ("Darrell G. Leavitt")
  Re: Fining on a large scale (Fred L Johnson)
  Mash Tun, Hops, and Milling ("Keith Christian")
  RE: Question about mash yield ("Ryan Thomas")

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---------------------------------------------------------------------- Date: Fri, 6 Apr 2012 07:11:45 -0400 (EDT) From: "Darrell G. Leavitt" <leavitdg at plattsburgh.edu> Subject: Re: Question about mash yield Mike; I brew a lot, and while I don't do a lot of calculating (I let Promash do that for me), it appears to me that beyond the conversion temperature/s, other factors that have had an impact on my efficiencies have to do with the amt of water used in the mash, the amt of hot liquor, the length of the boil, and I am sure that there is also some water chemistry goin on too, but other than real light brews when I have to use some distilled water (my water is like Munich water, rather on the hard side), I don't do much beyond calcium sulfate in the mash (drops the ph) and acidifying the sparge water. Happy Brewing! Darrell Return to table of contents
Date: Fri, 6 Apr 2012 08:59:38 -0400 From: Fred L Johnson <FLJohnson52 at nc.rr.com> Subject: Re: Fining on a large scale Aaron is having trouble dropping yeast in a 780 gallon batch of beer and asks if the amount of gelatin he uses for what approximatley 5-gallon batches can be simply scaled up to use for a 780 gallon batch. Assuming that the amount of gelatin Aaron uses for 5-gallon batches is an appropriate amount, I can't imagine any reason why this would not be directly scalable to a different size batch, unless the concentration of yeast he is trying to drop in the large batch is different than in the 5-gallon batches. The amount of gelatin relative to the amount of target material (yeast) in suspension should be a constant in my opinion. Of course, gelatin binds other things also, and these must be in the same concentration as in his 5-gallon batches also for this to work as expected. Fred L Johnson Apex, North Carolina, USA Return to table of contents
Date: Fri, 6 Apr 2012 07:27:48 -0700 From: "Keith Christian" <keithchristian at roadrunner.com> Subject: Mash Tun, Hops, and Milling I am making some changes in my brewing setup and I am looking for some advice. I am switching to a quarter barrel instead of a half barrel keg as my mash tun and I am interested in how much grain others are able to mash comfortably in one. My next batch consists of 19 lbs of grain and I am sure that it will work just fine, but wondering how much would max it out. My next batch is going to be an IPA and I thought I'd try Magnum hops for bittering. The AA is listed at 20! I have never used hops with that high of an AA and wonder how best to use them. The later additions of hops are going to be Simcoe. Looking forward to brewing a hoppy beer! When purchasing grain, I have always requested that it be bagged up separately so it can be milled by itself. I am wondering if this is something that I should continue to do or not. Milling Carapils with 2 row will be easier to mill than just the carapils by itself. The mill I use is a Malt mill set on its finest setting. Thanks, Keith Return to table of contents
Date: Fri, 6 Apr 2012 09:53:23 -0600 From: "Ryan Thomas" <ryanthomasai at gmail.com> Subject: RE: Question about mash yield Mike inquires about differences in his brewhouse efficiency between batches. One thing to look at is differences in grain, and another is how you are calculating your efficiency. I use ProMash for my efficiency calculations, and I use the included values for Pale and Pils malts. I have a consistent supply of both but I do not have the actual specs from the maltster as far as potential yield. Using the defaults I always have very high (95+) efficiency when using pale malt and lower (80-85) efficiency when using mostly pils. This leads me to suspect that the default values are low for the pale and high for the pils compared to my actual grains on hand. If your grain source changed between recipes that could account for your differences. Changes in your crush will also change your efficiency. If you used the mill at your LHBS it may have been changed between batches. Cheers, Ryan Thomas Broomfield, CO Return to table of contents
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