Coffeemaker not hot enough wizzkid suggestions?

Most coffee in the world is ruined by boiling it. You don't want to cook the grounds, just extract the oils and flavor. Johns's way works well, but, we just filter the grounds with that cotton bag, before pouring into the cup. I don't even like re-heated coffee. It gets that scorched taste from the pot being heated.
 

Iced Coffee? No Sweat

By CINDY PRICE
Published: June 27, 2007

BEFORE I go telling everybody that the secret to great iced coffee is already in the kitchen, my friend Keller wants me to confess: I didn’t know from iced coffee until he showed me the light.

Recipe: Cold-Brewed Iced Coffee (June 27, 2007)

It’s important to cop to this now, because not a summer goes by that he does not painstakingly remind me, a rabid iced-coffee drinker, that he’s the one who introduced me to the wonders of cold-brewed iced coffee. The funny thing is, when the subject came up we were holed up in a summer rental with three friends off the coast of Puerto Rico, on a tiny island not exactly swimming in upmarket coffee houses.

Our first morning there I brewed a blend from the local grocery in the coffeepot, laced it with a little half-and-half and sugar, then let it cool. Classy, I thought, carrying the pitcher to the table. “I’ll just take it hot,” he mumbled, while I blinked in disbelief.

Clearly, this boy didn’t know any better. A drink has a time and place. Surely he didn’t subscribe to drinking hot coffee in summer?

“No, I only drink iced coffee if it’s cold-brewed,” he said.

For five days we watched him sullenly sip his hot coffee on a broiling Caribbean island in the dead of summer. We chided him for his pretensions, ridiculed him, tried valiantly to break him, but he patiently waited us out. Once we tried it we would understand, he explained. Like friends disputing a baseball stat in a bar with no access to Google, we had no way to settle the argument.

Two weeks later, back in Brooklyn, I saw a sign: “Cold-Brewed Iced Coffee Served Here.” Fine, then. I threw down two bucks and took a sip. Though it pains me to admit, the difference was considerable. Without the bitterness produced by hot water, the cold-brewed coffee had hints of chocolate, even caramel. I dropped my sugar packet — no need for it. The best brews hardly need cream. It really is the kind of thing a gentleman might spend five days in hot-coffee solitary confinement for.

Most days I’m too lazy to hunt down the elusive cold-brewed cup. But recently I discovered an interesting little fact. Cold-brewed coffee is actually dirt simple to make at home. Online, you’ll find a wealth of forums arguing for this bean or that, bottled water over tap, the 24-hour versus the 12-hour soak. You can even buy the Toddy cold-brew coffee system for about $30.

But you can also bang it out with a Mason jar and a sieve. You just add water to coffee, stir, cover it and leave it out on the counter overnight. A quick two-step filtering the next day (strain the grounds through a sieve, and use a coffee filter to pick up silt), a dilution of the brew one-to-one with water, and you’re done. Except for the time it sits on the kitchen counter, the whole process takes about five minutes.

I was curious to see how it would taste without all the trappings. The answer is, Fantastic. My friend Carter, something of a cold-brewing savant, turned me onto another homegrown trick: freeze some of the concentrate into cubes. Matched with regular ice cubes, they melt into the same ratio as the final blend.


http://www.nytimes.com/2007/06/27/dining/27coff.html
 
A good site for all things coffee: http://www.sweetmarias.com
After trying a few different things I settled on this combination:
I roast green beans in a small 1200 watt convection oven every 5 days.
I grind right before I brew using a Zassenhaus conical burr grinder powered by a cordless drill.
I nuke my water and use an Aeropress which is basically an improved french press that uses a paper filter.
http://www.sweetmarias.com/aeropress/aeropress_instructions.php
This makes a concentrated coffee that I dilute with hot water.

Some of you might find this homemade roaster page interesting:
http://www.sweetmarias.com/homemade-homeroasters.php
 
liveforphysics said:
So, I took it apart, saw the thermistor, did a simple resistance vs temperature characterization on it, and then added the resistor needed to make it think it was ~100f cooler than it actually was, so it would keep the 1500w heating element on for another 100f higher than it would before. Took about 20mins all together, now it gets hot enough to flash-fry and does a much better job.

I would assume a coffee machine could be modified similarly (up to the limit of boiling the water), but I've never taken a look inside one to know for certain.
One probable gotcha with modifying the thermal cutoff for the heating element in at least some coffeemakers is that the same element is also used to keep the pot hot after brewing is done (and preheat the pot during brewing).

So you could be setting yourself up for an unexpected burned mouth if you're not aware of this, and expecting the coffee to be only a bit hotter out of the pot than it was before, when after a bit of time in the pot on the heater pad it could be a lot hotter. ;)


On some cold winter days/nights, I used to use a hotel-room-style coffeemaker to make my tea (I don't like most coffee), and I did try a few ways of making it hotter, short of the extreme mod I described before. None of them did much to help the brew if I used the teabags in the former coffeegrounds section, but they sure did make the final result stay hotter better, because of the same-element thing.
 
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I laughed as soon as I saw this. Once the coffee maker broke at a construction site I was aworking at. Everyone grumbled...but, I made one of these with a couple bent wire clothes hangars and a styrofoam cup with holes poked in its bottom. I've used paper towels when we were out of proper filters.
 
Thanks guys for all your input and great suggestions,the thermistor mod is right along the lines of what i am looking for but i was hoping for something even simpler like beefing up the traces and or shunts. I'm not versed in electronics enough to add or swap out resistors. and by the way this is one of those black and decker insulated carafe type. I also read the suggestions about the alternate methods for brewing and i totally agree; drip is probably the worst method for flavor but here's the rub...I have a wife. she just wants to dump in coffee ,dump in water and push a button. It's another one of those man woman divides,Example: about six years ago I discovered that roasting your own coffee makes a universe of difference in flavor from that day on iv'e been roasting,spent five years roasting with a westbend hot air popper - mastered it,little bit of a pain and messy but worth it, then last christmas the kids all chipped in and bought me a behmor 1600. I buy 20lbs of green beans from sweet maries about every three monthes.now to the point,If I dropped dead today none of that green coffee would ever get roasted - even with the new behmor - she told me. I also have had an aeropress for like three years ; she avoids it like the plague. Last I'm definitely gonna be looking into that cold brewing stuff -looks interesting.
 
xsi6 said:
...and by the way this is one of those black and decker insulated carafe type. I also read the suggestions about the alternate methods for brewing and i totally agree; drip is probably the worst method for flavor but here's the rub...I have a wife. she just wants to dump in coffee ,dump in water and push a button.
An insulated carafe is like leaving it on the burner, IMO... sits there cooking itself.

I kill the burner right after I drip-brew and nuke each cup as needed.


So I hauled out my Bodum yesterday and tried the cold-process: dumped in store-bought grounds and let them sit in cold water overnight. Pressed/filtered the grounds out and nuked a cup this morning.

It's good.

I would need to do a side-by-side with a fresh pot of hot-brew to really get a better comparison... but I'm not a real connoisseur, I'm too lazy these days.
 
I tried the cold brew method a few years ago and thought it was fine but took way too many grounds. The concentrated brew from the Aeropress allows you to use ice cubes for the dilution water. Much easier and quicker. The concentrated Aeropress brew in ice cream or custard is a premium treat.

I've nver done a taste test, but its claimed that a brewed cup will start to taste stale in 20 minutes. I think thats an open cup so a covered carafe might oxidize more slowly?

I recently weaned myself off my one cup in the morning habit and decided life was better with it. I prefer the good stuff but I'm also fine with instant in a cup of hot cocoa.
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i have no taste, commercial ground arabica is what i get off the shelf at the super. i use a fancy mr coffee i salvaged from the dumpster in like new shape (gave another one to a friend who was delighted to get it), use the extra strength button for whatever it does, but as soon as the coffee brews i pour it into a glass mason jar to the top and screw the lid on to keep out the air so it doesn't oxidize more. but i use a lotta milk, and nuke it when i need it. up to 2 days even. no sugar.
 
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