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Topic: microwave turkish coffee? (15 msgs / 325 lines)
1) From: Allon Stern
So, I'm sitting here looking at the coffee mugs with our project logo  
on them, and thinking they look moderately ibrik-able....
mug similar to these:http://www.showyourlogo.com/custom-coffee-mug/domain-mug.jpgbut perhaps curved just a little bit more.
so I dialed down the espresso grinder just short of the burrs  
touching, and products some fine powder.
Whaddaya know, it worked. In the microwave, even. Next time I may try  
to extend the brewing time by using a lower setting.
-
allon

2) From: Jim Gundlach
Allon,
    Would you mind sharing a few more details of your microwave  
Turkish coffee?
        pecan jim
On Nov 13, 2007, at 1:44 PM, Allon Stern wrote:
<Snip>

3) From: Allon Stern
On Nov 13, 2007, at 6:58 PM, Jim Gundlach wrote:
<Snip>
Absolutely.
I set my Rossi RR45 (haven't done the steppless modification yet) as  
fine as I could without the burrs actually touching, and made some  
coffee flour. I don't know why, but in the years I've had this  
grinder, I'd never ground coffee so finely before.
I didn't bother measuring, but I'd guess I had 1-2 tablespoons of  
coffee flour.
I filled the "ibrik" cup about 1-1.5 inches below the rim with cold  
water. I dumped the coffee on top of the water before I remembered  
that I forgot the sugar - and had read that you're not supposed to  
stir at this point, so I popped the cup into the microwave and ran it  
for just about 2 minutes when it started foaming up. When it was  
about to overflow, I stopped the microwave, poured in some sugar  
(maybe a couple of teaspoons) gave it a stir, and microwaved again.  
It foamed pretty quickly the second time.  Then another stir, another  
microwave until foaming. Then I poured it into another cup and let it  
sit a couple of minutes.
The grounds settled into a nice pile of sludge at the bottom of the cup.
Next time, I think i'll try spooning the foam off the top into my  
serving cup after the first foaming, and maybe running the microwave  
on a lower power to prolong the brewing time. This might not actually  
work very well, since microwaves modulate thier power by changing  
their duty cycle, not the actual power level.
It was really a spur of the moment experiment of office cookery.
After searching for a while, I'm unable to find any sort of  
microwaveable ibrik, or even a coffee cup near the right shape.
Anyone?
-
allon

4) From: raymanowen
"...microwaves modulate thier power by changing their duty cycle, not the
actual power level."
You're correct, but for the past 20 years or so, the control device has been
a diac gated triac, that controls the duty cycle of each individual sine
wave. The power doesn't flow until a certain phase angle from the
zero-crossing point.
The stuff being heated doesn't know from phase angles- it just gets more or
less power; hotter or notter.
Cheers, Mabuhay -RayO, aka Opa!
On Nov 13, 2007 8:43 PM, Allon Stern  wrote:
<Snip>
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976

5) From: Allon Stern
On Nov 13, 2007, at 10:57 PM, raymanowen wrote:
<Snip>
Hmph. Most microwave ovens I've seen just pulse on and off, easily  
seen by the fan lugging a bit when it kicks on the power, and easing  
up during a "resting" period.
I have no doubt that microwave power CAN be modulated more precisely,  
but I doubt that most microwave oven manuafacturers care to spend the  
extra $s and reliability that providing such control gives; average  
power spent heating the water in the food is probably good enough for  
most of 'em.
-
allon

6) From: Homeroaster
Add another cup or two of water to the microwave so more of the power is 
absorbed by the added liquid, lessening the power available to the coffee.
Try not letting it foam up to the point it begins to roll over.  If that 
happens, the brew goes flat and dies.  At least that's how it works using an 
ibrik.
*********************
Ed Needham
"to absurdity and beyond!"http://www.homeroaster.com*********************

7) From: Larry Johnson
Actually, I have a Panasonic (purchased from Sam's) that uses PWM
(Phase Width Modulation) technology to actually raise/lower the
continuous ouput power. It doesn't pulse at all, it truly outputs
lower watts when on a lower power setting - 10 power levels. It's a
great microwave; the first one I've seen that you can use to heat
bread without ruining it.
PWM technology has been used to control the speed of AC motors for
several decades. 'Bout time someone thought of using it in a
microwave.
On 11/13/07, Allon Stern  wrote:
<Snip>
-- 
Larry J

8) From: Erik Snapper
That's great, I didn't know those were available. My several year old
Panasonic uses the same long duty cycle that I've always seen. More even
power output would solve several problems.
Now the question is how to shop for one of these, since I doubt the
marketers put *now with PWM!* on the box. Is this what Panasonic is calling
"Inverter Turbo Defrost" which was "developed on the basis of what
scientists call 'Chaos Theory.'", thus making it "possible to distribute
microwave energy with the most appropriate combination of regularity and
irregularity." What a crazy description.
On Nov 14, 2007 11:06 AM, Larry Johnson  wrote:
<Snip>

9) From: Brian Kamnetz
Larry,
Are PWM microwaves available in the $150 range, or are they the $350+
microwaves?
Thanks,
Brian
On Nov 14, 2007 2:06 PM, Larry Johnson  wrote:
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10) From: Larry Johnson
It is odd wording, but I do know what they're talking about (I think)
based again on some of the design characteristics of some of the later
variable frequency motor controllers.
But never mind that, the words to look for are "Inverter Technology".
I think mine says something like "Smart..." or "Intelligent..." or
something to that effect "...Inverter Technology". Mine also has the
"Inverter Turbo Defrost" (which actually works, btw) , but I don't
know if that term means it's the PWM powered model or not.Sorry I
can't be more precise, I'm 130 miles away from it in a hotel room.
Anyone who wants me to be more precise about the model name, etc., I
can post it tomorrow night.
They use the term "Inverter" because it does operate very similarly to
a regulated switching power supply. Convert the incoming AC sine wave
to a DC bus (about 160 vdc from a 120 vac line), use Darlington-pair
transistors or GTOs (or something else - who knows?) to switch on and
off from the bus supply to produce pulses of varying lengths. The
wider the pulse, the more power you get. Narrower pulse, less power.
Use that varyiable pulse to drive the magnetron tube - voila! Variable
power. We've only been doing it since about 1975 in the variable speed
motor world.
To Brian K.: The price was under $200, and I think it has come down
since I bought mine. Be aware that there are several models of
Panasonics with this feature, so you may see one larger than mine for
more money, but mine is plenty big (no, don't know the cubic feet;
sorry). I'll post more detailed info on the one I have, and the one my
son has (a bigger one than mine) tomorrow evening.
On 11/14/07, Erik Snapper  wrote:
<Snip>
-- 
Larry J

11) From: Larry Johnson
If this isn't mine, it's very close.http://www.samsclub.com/shopping/navigate.do?dest=5&item69244&pCatgr42$150 sounds right.
On 11/14/07, Larry Johnson  wrote:
<Snip>
-- 
Larry J

12) From: Brian Kamnetz
I have been kicking myself for not being a bit more careful when I
bought appliances for my house  a year or two ago. Wish I would have
got one like this, if for no other reason that to make Turkish coffee
in it. Mine cycles on and off for lower "power" levels.
Brian
On Nov 14, 2007 4:36 PM, Larry Johnson  wrote:
<Snip>

13) From: raymanowen
They convert the 60hz line power to several khz and use a Far Lighter
transformer to raise the potential. The original Amana Radar Range microwave
ovens had a lot of iron in the transformer, for a linear ps: 2,000v, 1amp
power to the magnetron, with big heavy blowers for the mags. Power mosfets
now, methinks.
Much larger and more powerful now, and Far cheaper and light weight. About
$150.00 @ Sam's.
Cheers, Mabuhay -RayO, aka Opa!
ZAP!
On Nov 14, 2007 2:16 PM, Brian Kamnetz  wrote:
<Snip>

14) From: Allon Stern
On Nov 14, 2007, at 5:45 PM, Brian Kamnetz wrote:
<Snip>
Well, the microwave I'm using is one at work. Maybe I should go on a  
hunting expedition to see if any of the other microwaves at the  
office are higher grade...There are probably on the order of 16 or so  
microwaves at the offfice (it's a big building)...I doubt anybody  
would notice if two of them got swapped :)
Either that or maybe bring a hotplate in. I've got a old laboratory  
hotplate kicking around in the basement :) I even have some ibrik's I  
inherited from my grandparents....
-
allon

15) From: raymanowen
"Power mosfets now, methinks."
The Fets drive the HV transformer and Schottky diode rectifiers; still uses
the magnetron tube to generate microwaves. Dude, is your radio in a big
cabinet with a green tuning eye, tubes, a tuning condenser marked in
Kilocycles and an arial wire?
It's a whole new century, man!
Cheers, Mabuhay -RayO, aka Opa!
Got Grinder?
On Nov 14, 2007 4:19 PM,  wrote:
<Snip>
-- 
"When the theme hits the bass, I dance the Jig!" - -Virgil Fox at the Mighty
Wichita (ex- NYC Paramount) WurliTzer- 1976


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