HOMEBREW Digest #5464 Wed 10 December 2008

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  Re: Old Wyeast (steve alexander)
  More power, Stencil ! ("steve.alexander")

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---------------------------------------------------------------------- Date: Wed, 10 Dec 2008 20:31:28 -0500 From: steve alexander <steve-alexander at roadrunner.com> Subject: Re: Old Wyeast Mike Beck successfully resurrected an ancient Wyeast smack-pack. > Recently, September 2008, I picked up a packet of Wyeast Pilsen > Lager from a fellow brewer, dated July 2001. Knowing the yeast was > refrigerated the whole time, I gave it a try. It took about a week > for the packet to fully inflate. Then I poured the yeast into a > half liter and then two one liter starters to make two pilsners. Well done Mike. The problem with old tubes and wy-packs isn't that the yeast is dead, it's that the cells are no longer healthy and abundant enough to meet specs. If it puffs up, even slowly, then all you need to do is build a healthy starter. I' m personally of the opinion that the standard sized smack-pack should always go into a starter, but many ppl pitch these directly without problem. Yes - if I had an well sealed retail culture I'd just see if I could build it up - (cleanly, carefully) and use it. The other advantage of the starter in this case is that you can get a good whiff/taste of what you cultured and abort the culture if you get any funky-vibes or if it takes way-too-long. -S Return to table of contents
Date: Wed, 10 Dec 2008 20:52:40 -0500 From: "steve.alexander" <-s at roadrunner.com> Subject: More power, Stencil ! Re ultrasonic start degradation ... Stencil says, > Umm. Sixty hunnert lotta money. You maybe like senny-fi' > buck? > http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=95563 > > Since I already have a wee one, just big enough for a barrel > or a cylinder, I was thinking in terms of, say, a pound of > grain in a fairly stiff mash. >From what I read you need ~0.33-0.5Watt/cc at ~70% hydration (normal mash thickness) ~40khz give or take. So that's 1200W-2000W of ultrasonic per gallon of mash Your 160watt unit might handle a cup of mash. What's unclear is time .. maybe you could create a flow-thru continuous system if it's fast enough. BTW yo ustill need to mash for gelainization but the extract should improve a little. Also the gelat-temp increases which might throw a monkey-wrench in the mash schedule. -S Return to table of contents
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