On Mon, 27 Apr 2015 05:14:46 -0700 (PDT), mpm <
mpmi...@aol.com>
wrote:
>You do realize I was just dumbing down to Skybuck's level, right?
Yep. That's why I took your reply and tried to raise it back to at
least the SILLI (Standard Intelligence Level for Limited Intelligence)
level.
I was quite serious about the non-parallel walls helping to even out
the RF distribution. Too bad such a packaging is both awkward and
ugly.
>My home microwave has a carosel; the one at the office has an RF stirrer.
I recently destroyed mine:
<
http://www.11junk.com/jeffl/pics/drivel/slides/burned-yam.html>
That was 16 minutes instead of 6 minutes. The yams caught fire,
burned with a bright red glow, filled the house with smoke, and coated
the inside of the oven with a smelly yellow stain, which I can't seem
to remove, even with solvents and abrasives. The oven still works,
but everything I cook reeks of burned yams. It also seemed to have
ruined the kitchen smoke alarm, which was stuck on.
>And neither one can match the performance of the outdoor propane grill
>when it comes to "real man" food. :) --even if that's hoof from Costco!
A friend bought a $1500 outdoor propane grill recently. I was
suitably impressed by the cooking, but find I can do as well with a
hibachi, charcoal, and two thermometers (inside and surface). At $30
for dinner for two at a minimal restaurant, the $1500 could have been
better spent on 50 restaurant meals.
Note: Pointing this out to a barbeque fanatic is guaranteed to earn
you the worst cut, probably burnt. Not recommended.
>A engineering colleague of mine was under contract a couple years
>ago to develop novel foil covers for microwave dinners so that
>the individual food compartments would cook at different rates,
>and brown better. I recall there being some rather unique patterns
>in the foil; I suspect because of the varying polarizations while
>the food cooks. I don't know if this advancement is on the market
>yet or not since I don't eat microwave TV dinners. I don't recall
>the (food) manufacturer but it was one of the larger ones. Maybe P&G?
Great. I buy a maximum power output microwave inverter oven (1300
watts), and your colleague provides attenuation and reflections so
that most of the power is wasted. Yeah, that will work, but there are
better ways. For example, the oven could read the bar code or RFID
chip on the package, weight the contents, measure the initial
temperature (for defrosting), and calculate a suitable food reflow
profile. A separate antenna for creating a spot beam might help.
Break apart TV dinner trays placed in various areas of the oven that
are designated as hot or worm, might also work.
The problem is that surveys have shown that this would be too
automated for most consumers to still be considered cooking. So, the
industry has produced halfway measures, such as my Panasonic Sensor
1300w, which makes really bad guesses.
<
http://shop.panasonic.com/home-and-office/microwave-ovens/countertop-microwave-ovens/NN-SN651W.html>
I like the foil patterns idea, but maybe a metal grill template might
be more interesting:
<
http://upload.wikimedia.org/wikipedia/en/8/82/Microwave_metal_shelf.JPG>
I did some thinking about the problem of the door not opening more
than 90 degrees. It looks like the choke joint and outer cover, that
form part of the RF shielding on the oven need to overlap the door
slightly. The choke joint requires a recessed surface, while the case
shield requires a projecting surface. There's no way to design a
hinge that will cause the door to connect to the recessed surface
forming a choke joint, while also allowing the cover to overlap the
door when closed. The best you can do is stop at 90 degrees before
the door hits the projecting case. However, it could be done with one
of those elaborate multi-jointed cabinet hinges, as previously
mentioned.