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Topic: glass VP rods (8 msgs / 149 lines)
1) From: Bill
well, the discussion of VPs has made me think that I'm missing out.  So I
imagine that the list has made me gonna buy a Yama 5-cupper the next time I
place an order...  So the question is, how do the glass rods in a VP
actually work to filter?  I get everything about them but that.  I read on a
site that maybe the cory works by having rough bumps inside.  true?  How
does the cona work?  it appears smooth?
and finally, which is a better filter, the glass cona or a cory?
interested to hear what anyone has to say.
bill
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2) From: Rich
The "bumps" on the bottom of the rod provide multiple close tolerance 
passages between the upper bowl and the lower pot.  The vacuum formed by 
the condensation of the steam allows atmospheric pressure (14.7 psia at 
sea level) to force the water through th coffee grounds.  The grounds do 
not fit though the channels, but the fines almost do...
The vacuum pot was the coffee pot of choice along with the stove top 
perk pot until the advent of the direct plug-in perk pots arrived on the 
scene post WW-II.  As you might suspect, the vac pot is quite fiddly to 
get to work right and the accelerated life style after the war made it a 
large pain.  Leave one on the stove till it boils all of the water out 
of the bottom pot with coffee in the top.  If the lower pot does not 
crack the resulting coffee can be used to strip paint.  If the bottom 
pot cracks then the coffee ends up in the stove.  Really makes a mess 
out of breakfast and probably also results in burnt toast..
Bill wrote:
<Snip>
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3) From: Paul Helbert
On Mon, Apr 7, 2008 at 10:04 PM, Rich  wrote:
<Snip>
frame job which you  watched for the proper moment to turn the slices
manually. Well, sort of manually. You opened the door to allow the toast to
slide down to be flipped up to expose the other side to the heat. Ingenious.
Back then we all ate breakfast together at the same time, too.
-- 
Paul Helbert
Prepackaged, roasted & ground coffee,,,
One of the worst ideas since sliced bread.
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4) From: Bill
OK, so I'm still wondering if there's a difference between a Cona and a Cory
glass rod in a vac pot like a Yama... anybody know?thanks!
bill
On Mon, Apr 7, 2008 at 11:02 PM, Paul Helbert 
wrote:
<Snip>
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5) From: Rich Adams

6) From: Bill
Tom's notes indicate that the Cona will fit in a Yama, and I hear from the
list that the Cory works in the Yama...
Thanks for the input Rich that you don't notice any difference.  Am curious
if there is any other thoughts...
bill
On Tue, Apr 8, 2008 at 11:28 AM, Rich Adams  wrote:
<Snip>
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7) From: Paul Helbert
The older Cona (1930's & '40's rod is a bit heavier than the new universal
replacement which SM sells. I have had the light (newer) one get pushed up
out of its funnel a time or two and prefer to use the old one because of
that.
On Tue, Apr 8, 2008 at 3:20 PM, Bill  wrote:
<Snip>
There are always other thoughts here.
 ;-)
Paul Helbert
Prepackaged, roasted & ground coffee,,,
One of the worst ideas since sliced bread.
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8) From: Rick Copple
Bill wrote:
<Snip>
Only that I've been using a Yama (8 cup stove top model) with a Cory rod 
for several months, and it works perfectly. Better than it did in my 
Cory electric pot. Rarely a stall and I don't sift for fines either. I 
make a pot every morning with it.
But I've never used a Cona glass rod, so I can't compare them.
-- 
Rick Copplehttp://www.rlcopple.com/Homeroast mailing list
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