alpha acids - Home Brew Forums

Register Now!
Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > alpha acids

Reply
 
Thread Tools
Old 10-14-2010, 08:22 PM   #1
Teufelhunden
 
Teufelhunden's Avatar
Recipes 
 
Oct 2009
Texas
Posts: 130
Liked 1 Times on 1 Posts



Hey guys, I am going to brew a recipe that calls for northern brewer hops 6.5% alpha acids. I looked on AHS website and can only find them at 10.4%. What is the best way to adjust?

 
Reply With Quote
Old 10-14-2010, 08:57 PM   #2
RugenBrau
Recipes 
 
Sep 2008
Finger Lakes
Posts: 752
Liked 6 Times on 6 Posts


http://www.howtobrew.com/section1/chapter5-4.html

this should help you figure it out.
__________________
"Your HYDROMETER is the only BEST indicator of fermentation activity. Nothing else is accurate or consistent"...Revvy

 
Reply With Quote
Old 10-14-2010, 09:04 PM   #3
ridnpowder
Recipes 
 
Sep 2010
Keweenaw Peninsula, Michigan
Posts: 18

From what I understand...

Weight x %AA = Weight x %AA
In your case that would be:
Weight X 6.5%AA = Weight x 10.4%AA

This essentially boils down to 6.5/10.4=0.625 or 5/8 of the called for weight.

If the recipe calls for 1oz of 6.5%AA hop, the you would use 5/8oz of 10.4%% hops.

Here is a IBU calculator that my be useful if you want to play around with the hop weights, %AA, and addition time.

http://www.rooftopbrew.net/ibu.php

 
Reply With Quote
Old 10-14-2010, 10:38 PM   #5
david_42
 
david_42's Avatar
Recipes 
 
Oct 2005
Willamina & Oak Grove, Oregon, USA
Posts: 25,593
Liked 151 Times on 142 Posts


Only adjust the bittering add. The flavor and aroma adds are for the oils and oil levels are not impacted by AA %. You will be a little higher for the IBUs, but not by much.

 
Reply With Quote
Old 10-15-2010, 01:06 AM   #6
Teufelhunden
 
Teufelhunden's Avatar
Recipes 
 
Oct 2009
Texas
Posts: 130
Liked 1 Times on 1 Posts


Thanks guys!!!

 
Reply With Quote
Reply
Thread Tools


Similar Threads
Thread Thread Starter Forum Replies Last Post
dry hopping with a high alpha% brendanb Beginners Beer Brewing Forum 16 04-22-2010 12:13 AM
homegrown hops alpha levels minus Beginners Beer Brewing Forum 5 10-10-2009 09:24 PM
subbing hops: target hops (high alpha) for something normal alpha jigidyjim Beginners Beer Brewing Forum 2 09-27-2009 07:44 AM
How to adjust ammount of hops according to Alpha Acids chemman14 Beginners Beer Brewing Forum 13 09-08-2009 08:57 PM
Does anyone know a clone for Three Floyds Alpha King Pale Ale? impatient Beginners Beer Brewing Forum 6 01-20-2009 12:01 AM


Forum Jump