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Discussions > Coffee > Machines > Impulse buy  
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jpender
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jpender
Joined: 11 Jul 2011
Posts: 694
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Mon May 6, 2013, 9:49am
Subject: Re: Crap - couldn't avoid impulse buy! (AGAIN!)
 

Netphilosopher Said:

slight tamp... flow was really slow.... I decided enough was enough...elements of overextraction.

Posted May 6, 2013 link

There should be a name for this type of moka experience. Maybe the Italians have a word or phrase for it? Lacking an established term I would suggest: "moka stitico".

One piece of the moka vocabulary that I came upon recently is: "strombolian". This refers to the final stage of brewing -- the one you didn't reach -- where the pot is sputtering, volcano-like, passing a mixture of water and steam through the grounds.
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Netphilosopher
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Joined: 14 Jan 2011
Posts: 1,602
Location: USA
Expertise: Just starting

Posted Mon May 6, 2013, 10:26am
Subject: ...
 

...
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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 694
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Mon May 6, 2013, 5:30pm
Subject: Re: Crap - couldn't avoid impulse buy! (AGAIN!)
 

What you described has been my typical experience when tamping the grounds or using too fine a grind.

I tried this again about a week ago. A fairly modest tamp. I used the same amount of coffee as before, but pressed down a few millimeters. So innocent.

As the grounds "set" the pressure requried to drive the flow was too high. If I cranked up the heat I'd get too high a temperature. After a while I gave up and accepted a smaller cup of not-so-tasty coffee. The unscrewed pot then revealed grounds that were saturated and a lower chamber that was full of water and back-drained coffee.

Someone earlier in this thread posted that moka pots are pretty simple. I don't find that to be the case at all.
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Netphilosopher
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Location: USA
Expertise: Just starting

Posted Tue May 7, 2013, 4:24am
Subject: ...
 

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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 694
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Tue May 7, 2013, 5:27pm
Subject: Re: Crap - couldn't avoid impulse buy! (AGAIN!)
 

Grind, time, temperature -- those are the main variables.
You choose the grind yourself. Time is easy to monitor. But what about temperature?

So I added an easy plug-in thermometer to my moka pot.

I started with a Taylor probe that you can buy for $15.

jpender: IMG_0192.JPG
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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 694
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Tue May 7, 2013, 5:30pm
Subject: Re: Crap - couldn't avoid impulse buy! (AGAIN!)
 

I carefully scratched a groove around the metal probe with a hacksaw, then bent it to snap it open.

I attached a wire with a plug to the body and soldered wires to the tiny bead thermistor that was in the tip. I covered the thermistor with JB Weld (non-toxic) and coated the wires with food safe silicone. I ran these wires through the hole in a bicycle chainring bolt which happens to have the same threading as the safety valve on my moka pot, and epoxied the female end of the plug to outside of this.

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jpender
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jpender
Joined: 11 Jul 2011
Posts: 694
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Tue May 7, 2013, 5:34pm
Subject: Re: Crap - couldn't avoid impulse buy! (AGAIN!)
 

Ready to brew!

With the plug inserted into the bottom of the basket, the probe tip rests against the lower screen. So it measures the temperature of the water just before it enters the grounds. There is a temperature gradient, which narrows as the brew progresses, from bottom to top of the puck. So this is a measurement of the hottest part.

Close up of the screen with probe in place -- you can just see the tip trying to poke through one of the holes.

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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 694
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Tue May 7, 2013, 5:36pm
Subject: Re: Crap - couldn't avoid impulse buy! (AGAIN!)
 

First smell of coffee -- the sign that the heating water is starting to infuse the grounds.
It is only 63C.

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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 694
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Tue May 7, 2013, 5:37pm
Subject: Re: Crap - couldn't avoid impulse buy! (AGAIN!)
 

Coffee finally begins emerging from the pipe when the brew water is at 81C.

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jpender
Senior Member
jpender
Joined: 11 Jul 2011
Posts: 694
Location: California
Expertise: I like coffee

Grinder: OE LIDO
Vac Pot: S/S Moka Pot
Drip: Aeropress
Posted Tue May 7, 2013, 5:38pm
Subject: Re: Crap - couldn't avoid impulse buy! (AGAIN!)
 

Almost finished.

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