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Topic: Unsteady stream from portafilter...why? (13 msgs / 260 lines)
1) From: Jason Molinari
I've been noticing lately that on my Tea i get a somewhat unsteady stream from the PF when brewing. I use the single basket with about 13g of coffee, and get about 1.25-1.5oz in 27-30 seconds, but the stream instead of being mousetail like and going straight down, it kind of "plops" out of the spout. It also seems to be rather "airy", and "bubbly" in the cup, small bubbles, maybe 0.5-1mm diameter, but they are there nonetheless.
Any thoughts? I tried the double basket and it did a similar thing. Machine is regularly backflushed with cafize and pf are allowed to soak in it.
jason

2) From: AlChemist John
I have had that when my tamp was off and I had channeling (often when my 
tamp was not horizontal)  Also, isn't 13g a lot for a single basket?  Have 
you cleaned (or just checked) the shower screen lately?
Sometime around 05:54 2/17/2004, Jason Molinari typed:
<Snip>
--
John Nanci 
AlChemist at large
Zen Roasting , Blending & Espresso pulling by Gestalthttp://www.dreamsandbones.net/blog/http://www.chocolatealchemy.com/

3) From: Ed Needham
So I hear you complaining that the extracted brew is too thick?  Wow, to have
such problems.
***********************************************
Ed Needham
To Absurdity and Beyond!
"Nunc Aut Nunquam"
homeroaster ... d.o.t ... com
***********************************************

4) From: Bob Sanders
<Snip>
Yes, I've had the same thing occur.  Had to go back to basics and re-learn
the tamp. It's pretty easy to angle the puck it attention to technique -
unknowningly not having your arm at 90 degrees to the portafilter. 
Also, the tamper can make a lot of difference.
While the nice barista tampers that Tom sells work fairly well - I use one
here at work, the base is too thin and it's easier to rock or angle it a
bit. The same occurs with the typical Rosewood steel tamper. 
A thicker base tamper like Vivace's ergo tamper or one of Les' Thor
tampers won't be as prone to rocking in the basket.
<Snip>
I've been getting much more consistant since I switched to a La Marzocco portafilter
and basket on my Millenium.  That seems to be due to two things - the handle on the
La Marzocco is bent downward - allowing a more natural holding of the portafilter such
that the basket is level while your hand rests on the counter, and the baskets being
more straight sided - significantly less angles than the standard Isomac baskets.
The downside is it takes more effort to get the spent pucks out of the basket.  But they
are consistantly better than the older pucks.  I also note there seems to be a bit wider
range over which the grind can be adjusted for flavor.  (Perhaps that just a delusion.)
Bob

5) From: Chris Tacy
How does it taste?
It could be the temp, it could be the beans, it could be your tamping...
The taste will indicate better which it is.
-c

6) From: Jason Molinari
Just recently took off the shower screen and cleaned it all up and replaced the gasket. 13g is normal for an isomac single filter.
I think i'm tamping horizontally, maybe i'll try and be more horizontal:)
jason
<Snip>

7) From: Jason Molinari
hrmm, yeah i guess that could be it:) It is very thick in drinking, tastes good, but i was just wondering about the airyness as well..
jason
<Snip>

8) From: Jason Molinari
it tastes good., it just doesn't look pretty:)
jason
<Snip>

9) From: Chris Tacy
doesn't look pretty coming out of the spout or in the cup?
if the former... it really isn't a big deal I don't think, but you could try
swapping in a different bean or blend to see if the results are the same.
-c

10) From: Ed Needham
Sometimes, if the beans are fresh out of the roaster, they explode with crema
and can do what you describe.  Not sure it's a bad thing though, but possibly
a bean that has rested a few days would perform differently.
***********************************************
Ed Needham
To Absurdity and Beyond!
"Nunc Aut Nunquam"
homeroaster ... d.o.t ... com
***********************************************

11) From: Jason Molinari
It does't look pretty in the cup either. It doesn't look BAD, but i don;t like the mini bubbles in my crema. This is with a few different blends, i'm going to try a differnet spout (double instead of single spout).
jason
<Snip>

12) From: Chris Tacy
you might want to check the temp.
-c

13) From: AlChemist John
I have come across the mouse tails also.  Does that only hold for 
espresso?  I notice some of my best shots are the very thick short 
shots.  Thinking I may be  a ristretto fan (except the volume is gone so fast).
Sometime around 08:37 2/17/2004, Ed Needham typed:
<Snip>
--
John Nanci 
AlChemist at large
Zen Roasting , Blending & Espresso pulling by Gestalthttp://www.dreamsandbones.net/blog/http://www.chocolatealchemy.com/


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