Author Topic: No head!?!?  (Read 2885 times)

Offline Joe Sr.

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Re: No head!?!?
« Reply #15 on: April 24, 2012, 07:17:34 AM »
Also soap/oil on the glass, fermenter, etc.

I would rule this out first.  If you're using jet dry or something like that in your dishwasher it will kill the head on the beer.

Rinse and wipe your glass and see if that helps.
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Offline a10t2

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Re: No head!?!?
« Reply #16 on: April 24, 2012, 07:46:13 AM »
Your wort did not get up to 216F under any kind of normal brewing conditions

A ~20°P wort at sea level would boil at 216°F. Not that that's necessarily what happened, but it wouldn't be abnormal.
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Online morticaixavier

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Re: No head!?!?
« Reply #17 on: April 24, 2012, 07:49:09 AM »
Your wort did not get up to 216F under any kind of normal brewing conditions

A ~20°P wort at sea level would boil at 216°F. Not that that's necessarily what happened, but it wouldn't be abnormal.

okay but a 7.5 plato wort would not. So, to the OP, what's your elevation?
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Offline gmwren

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Re: No head!?!?
« Reply #18 on: April 24, 2012, 08:21:05 AM »
I used to use two lab grade thermometers that gave very close readings. One was NIST certified (with serial number), the other was NIST traceable. I suspected something was wrong, so I used water baths to determine how far off. Boiling was off 12 and 10 deg F high respectively, ice water bath (correctly done) was 4-5 high on both. talked myself into getting a Thermapen and confirmed they were both 7 deg low at a 150 mash temperature. Those things were all over the place. The Thermapen also confirmed my Ranco probes and ice bath numbers.

Offline garc_mall

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Re: No head!?!?
« Reply #19 on: April 24, 2012, 09:12:08 AM »
I used to use two lab grade thermometers that gave very close readings. One was NIST certified (with serial number), the other was NIST traceable. I suspected something was wrong, so I used water baths to determine how far off. Boiling was off 12 and 10 deg F high respectively, ice water bath (correctly done) was 4-5 high on both. talked myself into getting a Thermapen and confirmed they were both 7 deg low at a 150 mash temperature. Those things were all over the place. The Thermapen also confirmed my Ranco probes and ice bath numbers.

That means you were roughly between 130-134 for the 30 minute beta rest. That's in protein degradation temperatures, and I would guess that is what really wiped out your head.
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Offline tschmidlin

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Re: No head!?!?
« Reply #20 on: April 24, 2012, 09:56:08 AM »
Your wort did not get up to 216F under any kind of normal brewing conditions

A ~20°P wort at sea level would boil at 216°F. Not that that's necessarily what happened, but it wouldn't be abnormal.
How do you get there?  I've got 216F coming out to 102.2C.  To get an increase of 2.2C you need 40 brix.  Is this calculator off? :-\
http://sugartech.co.za/bpe/index.php
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Offline a10t2

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Re: No head!?!?
« Reply #21 on: April 24, 2012, 10:38:24 AM »
How do you get there?  I've got 216F coming out to 102.2C.  To get an increase of 2.2C you need 40 brix.  Is this calculator off? :-\
http://sugartech.co.za/bpe/index.php

I was working from memory, with each 10% bumping it up about 1°C. When I plug 20°Bx into that calculator it says 101.9°C... 23°Bx is 102.2°C... ???
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Offline tschmidlin

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Re: No head!?!?
« Reply #22 on: April 24, 2012, 03:13:34 PM »
How do you get there?  I've got 216F coming out to 102.2C.  To get an increase of 2.2C you need 40 brix.  Is this calculator off? :-\
http://sugartech.co.za/bpe/index.php

I was working from memory, with each 10% bumping it up about 1°C. When I plug 20°Bx into that calculator it says 101.9°C... 23°Bx is 102.2°C... ???
Interesting.  When I put the temperature as 100C then I get 23°Bx, but when I leave the temp blank I get 40°Bx.  In a water boiling point elevation calculator, why would you have to enter the temperature?  I assume by temperature they mean the bp of water?  Strange.  I guess I was doing it wrong, thanks for fixing it :)
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Offline andrew000141

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Re: No head!?!?
« Reply #23 on: April 25, 2012, 09:09:07 AM »
In reply to the elevation issue, The beer was moving slightly about as if the bottom was boiling but the top wasn't. Where i live its about 370-470 feet above sea level, sorry for the large range.
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Re: No head!?!?
« Reply #24 on: April 25, 2012, 09:42:38 AM »
In a water boiling point elevation calculator, why would you have to enter the temperature?  I assume by temperature they mean the bp of water?

I think that it's to compensate for altitude effects. 30°Bx at sea level is a 3.0°C BPE, but at 90°C where I boil it's 2.8°C.
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Offline tschmidlin

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Re: No head!?!?
« Reply #25 on: April 25, 2012, 10:12:05 AM »
In a water boiling point elevation calculator, why would you have to enter the temperature?  I assume by temperature they mean the bp of water?

I think that it's to compensate for altitude effects. 30°Bx at sea level is a 3.0°C BPE, but at 90°C where I boil it's 2.8°C.
Cool, thanks again, I hadn't thought of that.  I think they could use a better explanation on that calculator, I assumed that you put in brix to get the BPE, or you could put in a temp to get a brix, etc.  Clearly I was wrong. :)
Tom Schmidlin