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Topic: profiling pre-blends (3 msgs / 71 lines)
1) From: David Lewis
I roast in an HWP, pretty much exclusively for espresso. After all 
the discussions of profiling, I've taken to extending my roasts by 
hitting the cool switch for five seconds about 45 seconds to a minute 
into first crack, then again a minute and thirty seconds later (at 
normal temperatures). With some blends, and pretty much all 
single-origin coffees, this works well. With some blends, though, the 
beans reach first crack at wildly different times, and I wind up with 
something that's both sour and bitter if I try hitting cool a minute 
into the lead bean's first crack. I've taken to just hitting the 
five-second cool later, just to extend the time from first to second 
on those blends. Does anyone know a way around this?
Best,
	David
-- 
"To announce that there must be no criticism of the President, or 
that we are to stand by the President right or wrong, is not only 
unpatriotic and servile, but is morally treasonable to the American 
public."
     -- Theodore Roosevelt
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2) From: Jim Schulman
You could try hitting the cool as soon as the lead 
beans show the first hints of the first crack. If 
you can keep the beans below 350F, you can delay 
the first crack until the laggards catch up. I 
don't know if it's possible (I can do it with a 
variac), but it's worth a try. 
I'm also beginning to suspect just shutting the 
roaster down may work better than cooling shots, 
but again I don't know nearly enough to assert 
that for certain.
Jim
On 14 Nov 2002 at 20:08, David Lewis wrote:
<Snip>
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3) From: David Lewis
At 11:38 PM -0600 11/14/02, Jim Schulman wrote:
<Snip>
Thanks. I have my doubts, but it's easy enough to try, so I'll try it.
<Snip>
One thing I'd watch, as you do that research, is the mechanical and 
thermal state of the roaster. The air doesn't just cool the beans, it 
also cools the motor, fan, and heating element. The Hearthware 
instructions, as I recall, are pretty adamant about letting the cool 
cycle complete before unplugging it.
	David
<Snip>
-- 
"To announce that there must be no criticism of the President, or 
that we are to stand by the President right or wrong, is not only 
unpatriotic and servile, but is morally treasonable to the American 
public."
     -- Theodore Roosevelt
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast


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