Coffee: Resources for home espresso (#)
„Whether to pull a lever or press a button is a subject of great debate. There areso many variables involving "operator feel" to making an espresso, that (thelever view) to press a button for the critical step is like hitching the lastquarter mile up Mount Washington after climbing all morning, -vs- (thepump view) there are enough control variables to give up a few degrees offreedom, and a good pump can do a steadier job of extraction than a lever. Everyoneagrees that a Pavoni has a great deal of personality; some just feel that it has too much.“
http://www.math.columbia.edu/~bayer/coffee.html - Cached
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„WholeLatteLove.ComBuy in Canada QualityCoffeeSystems The Gaggia and Pavoni Levers Love them or hate them, the classics are here to stay. The Gaggia and Pavoni lever powered espresso makers are more than just a pretty face in the kitchen. When it comes to espresso, with these units it is you against the elements. There is no pump to assist you.“
http://www.coffeecrew.com/articles/.../ buying-the-best-espresso-cappuccino-machines.html
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„a modern day espresso must be produced in a pump or piston or lever machine capable of producing roughly 9BAR of pressure“
http://www.coffeekid.com/espresso/minifaq
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„The best espresso is made using a pump driven type of espresso machine rather than a piston lever type. (This is a highly subjective observation.) Set pump pressure between 8 and 9 bars during the brewing process. Pressure must remain stable during brewing with almost no variation.“
http://www.lucidcafe.com/cafeforum/factors.html
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„Besides espresso coffee machines including fully automatic and traditional models, Rancilio production includes lever hand-operated models and other special series, a household line and a full range of equipment such as grinders, cup washers, icemakers, cooking plates and relevant accessories. The most recent model is the new automatic frothing device c1, which delivers the typical hot“
http://www.rancilio.it/english/gammaeng.htm
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