Brew Log : Jamieson Doppelbock - May 24, 2009

Brewlog: Jamieson Doppelbock - May 24, 2009

Brewday Brewday Print

Brewed:	May 24, 2009	Bottled/Kegged:	July 8, 2009	Status:	Ready

Values:

Volume to fermenter[ltr (gal)]:	19.00	Alcohol by volume:	7.18%	Apparent Attenuation:	74.44%

Original Gravity[SG]:	1.072	Final Gravity[SG]:	1.018	Colour [SRM(EBC)]:

BU/GU ratio:	0.34	Balance:	0.70

Recipe Values:

Expected Mash Efficiency:	75.00%	Expected Bitterness[IBU]:	24.60
Actual Mash Efficiency:	102.20%

Expected Values >>

Comments:

Pitched this morning.

Looks fantastic. Set off at 10c with about 100ml of yeast (450billion cells)

Log entries:

Attenuation(points) vs Time(days)

Sat September 12, 2009 12:47	Gravity reading[SG]: 1.018, Temp[C (F)]: 4.00 (39.20), Atten: 74.44%, ABV: 7.18%	One last gravity reading to try and work out where it really did finish. This is after a couple of months of lagering.
Thu July 02, 2009 14:26	Gravity reading[SG]: 1.026, Temp[C (F)]: 12.00 (53.60), Atten: 63.89%, ABV: 6.17%	Still full of acetaldehyde. Pitched one more lot of yeast and left it inside to see if it cleans up ... this is a last ditched effort. Going to lager after this and just leave it to sit regardless of what the issues are now.
Fri June 26, 2009 22:13	Gravity reading[SG]: 1.026, Temp[C (F)]: 9.00 (48.20), Atten: 63.66%, ABV: 6.14%	Really disappointed in this one. Still heaps of acetaldehyde, and gravity reading is going up now down :( ... was much better before I added the extra yeast. Going to rack it to a keg, then feed up the left over yeast and get it to krausen, then add it back in ... fscking lagers!!!
Sun June 21, 2009 23:05	Gravity reading[SG]: 1.020, Temp[C (F)]: 16.00 (60.80), Atten: 72.65%, ABV: 7.01%	Still some acetaldehyde, back in the freezer to get it down to lager temps again
Thu June 18, 2009 21:32	Gravity reading[SG]: 1.021, Temp[C (F)]: 16.00 (60.80), Atten: 70.86%, ABV: 6.84%	Just about done now
Mon June 15, 2009 20:26	Gravity reading[SG]: 1.023, Temp[C (F)]: 14.00 (57.20), Atten: 67.75%, ABV: 6.54%	fsck fsck fsck fsck fsck fsck now its developed some very pronounced acetaldehyde flavour ... better bloody clean itself up!!!!
Sun June 14, 2009 21:22	Gravity reading[SG]: 1.026, Temp[C (F)]: 16.00 (60.80), Atten: 63.89%, ABV: 6.17%	Raised the temperature to 16C and pitched more yeast today
Sat June 13, 2009 09:32	Gravity reading[SG]: 1.026, Temp[C (F)]: 8.00 (46.40), Atten: 63.22%, ABV: 6.10%	Still stalled tasting good though.
Wed June 10, 2009 08:34	Gravity reading[SG]: 1.028, Temp[C (F)]: 9.00 (48.20), Atten: 61.40%, ABV: 5.93%	Seems to have stalled. Need to pitch more yeast. Also distinct acetaldehyde present which shows signs of yeast stress and incomplete fermentation.
Sat June 06, 2009 16:52	Gravity reading[SG]: 1.025, Temp[C (F)]: 11.00 (51.80), Atten: 65.94%, ABV: 6.36%	Tasting good and is still going. Was about to add more yeast!
Thu June 04, 2009 20:37	Gravity reading[SG]: 1.030, Temp[C (F)]: 11.00 (51.80), Atten: 58.66%, ABV: 5.66%	Think its is stalling :(
Tue June 02, 2009 16:21	Gravity reading[SG]: 1.030, Temp[C (F)]: 11.00 (51.80), Atten: 58.66%, ABV: 5.66%	Very malty and some noticable alcohol
Sun May 31, 2009 12:46	Gravity reading[SG]: 1.036, Temp[C (F)]: 11.00 (51.80), Atten: 49.47%, ABV: 4.77%	Starting to get a bit of honey, which I am not happy about. Still plenty of yeast in suspension though.
Thu May 28, 2009 21:00	Gravity reading[SG]: 1.044, Temp[C (F)]: 11.00 (51.80), Atten: 39.24%, ABV: 3.79%	hmmm malty bock goodness
Tue May 26, 2009 22:03	Gravity reading[SG]: 1.013, Temp[C (F)]: 20.00 (68.00), Atten: 81.94%, ABV: 7.91%	Fast ferment sample
Mon May 25, 2009 19:57	Gravity reading[SG]: 1.069, Temp[C (F)]: 10.00 (50.00), Atten: 4.17%, ABV: 0.40%	Not really sure about this. Seems to be a bit of pressure in the head space, and lots of yeast in suspension. Also definitely a krausen there. Might aerate it a bit more just to be on the safe side.

Log tasting entries:

Wed September 30, 2009 13:35	Rating: 38 Age at tasting: 2 months	Bock is really starting to come good now. Bitterness has faded a lot and is much more malt accentuated.
Sat September 12, 2009 12:50	Rating: 38 Age at tasting: 2 months	Starting to taste pretty good now the carbonation is coming up. No noticeable flaws, but bitterness in the finish is still an issue.
Fri September 11, 2009 13:35	Rating: 35 Age at tasting: 2 months	Finally racked to another keg and started carbonation process. Still a bit bitter and quite noticeable alcohol. Will need another couple of weeks to clear up again properly.