Op amps problem Gain Calculation

On Sun, 30 Dec 2018 00:17:59 -0000, Clare Snyder <clare@snyder.on.ca> wrote:

On Sat, 29 Dec 2018 12:00:47 -0600, Bill Gill <billnews2@cox.net
wrote:

On 12/29/2018 11:29 AM, William Gothberg wrote:
On 2018-12-29 10:26 a.m., William Gothberg wrote:
On Sat, 29 Dec 2018 14:46:52 -0000, Andy Bennet <andyb@andy.com> wrote:

On 29/12/2018 13:43, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW? They
were invented decades ago.

High power microwaves (>1MW) are used in industry in for example ore
extraction/rock pulverizing.
1MW into a cup of water is not pretty, explodes the water contents and
breaks the cup.

I don't need a MW, but the usual 600W to 900W in domestic ovens is
pitiful. What's wrong with 2kW?

too expensive

1200 watt consumer microwaves are widely available. Check your
Walmart or whatever you have.

Bill
The "normal" microwave here in Canada is 1000 watts with the odd 1200

Depends what you call normal. Do you mean the cheapest, the most expensive, the most common make, what most people buy, .....

[crosspost repaired, stop fucking about]
 
On Sun, 30 Dec 2018 00:06:53 -0000, 87213 <87213@gmail.com> wrote:

"William Gothberg" <William_Gothberg@internet.co.is> wrote in message
news:eek:p.zus3lxpe7uplkq@desktop-ga2mpl8.lan...
On Sat, 29 Dec 2018 22:49:05 -0000, 87213 <87213@gmail.com> wrote:



"William Gothberg" <William_Gothberg@internet.co.is> wrote in message
news:eek:p.zusz2vco7uplkq@desktop-ga2mpl8.lan...
On Sat, 29 Dec 2018 21:23:55 -0000, mike <ham789@netzero.net> wrote:

On 12/29/2018 10:16 AM, William Gothberg wrote:
On Sat, 29 Dec 2018 17:38:04 -0000, Clare Snyder <clare@snyder.on.ca
wrote:

On Sat, 29 Dec 2018 08:07:42 -0800, Bob F <bobnospam@gmail.com
wrote:

On 12/29/2018 6:37 AM, trader_4 wrote:
On Saturday, December 29, 2018 at 9:23:42 AM UTC-5, Bill Gill
wrote:
On 12/29/2018 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW?
They
were invented decades ago.
Higher powered microwaves would require higher powered electric
outlets, probably 220VAC (in the USA).

Also it is questionable whether higher powered ovens would be
practical for use. Getting warming times down to a couple of
seconds might not be a good idea. More speed is not always
better.

Bill

+1

That about covers it. Not sure how useful more power would be.
For
example,
last night I was thawing out a tomato sauce in a quart plastic
container.
The Panasonic has a defrost mode that uses about 30% power and
cycles that.


It gets the 30% power by cycling the 100% power on 30% of the time.

(By the way, adjusting the level does not actually change the
wattage.
It simply means the microwave will pulse on and off at its fixed
wattage
until the desired level is reached.)

https://lifehacker.com/5974788/familiarize-yourself-with-your-microwaves-power-settings-to-make-microwave-cooking-a-joy

That was true of the first generation of Microwaves, but the current
"inverter" driver units actually CAN throttle the power. Inverter
microwaves are much better for defrosting AND cooking.

We've had ours for about 2 years now - replacing our original that we
bought in about 1985.

BIG difference (but the old one would likely still be working by the
time this one dies)

Why is it called an invertor? I thought an invertor was a device to
increase the voltage - like running 240V devices off a 12V car
battery.

And why on earth would you not want to cook on full power? I've never
had a reason to lower the power from the maximum of 800W. I want the
meal as soon as possible!

There's been a lot of nitpicking in this thread.

All microwaves reduce power by cycling between 0 and 100% power.
The relative power level is the duty factor of that on/off cycle.

Older microwaves switch the INPUT to the power transformer.
That also runs the filament. The time to heat up the filament
is the limiting factor in how short you can make the on-time.
You get a minimum of about 10 seconds on-time.
That minimum time is plenty to make food explode.

Better microwaves are called "Inverter" microwaves.
I believe they're all licensed from Panasonic.
When I bought mine, it seemed that all the licensees had
dried up leaving Panasonic as the only locally available units.

It's my understanding that they heat the filament independently
and can have very short on-times. Duty factor is the same as
the older microwaves, but the on-time can be much shorter.

Foods don't explode on low power like they used to.

Food is not uniform. The effectiveness of microwaves decreases
as the food thickness increases. There's a thermal time constant.
So, if you cook at lower average power for longer time,
you can warm the inside without seriously overcooking the outside
or having local boiling that makes food explode.

The minimum on-time really helps with that. I haven't had food
explode since I got an Inverter microwave. The defrost cycle
really does work well.

They're slightly more expensive, but it's worth it.

I've never exploded food on a non-invertor microwave.

Try microwaving an egg in its shell sometime.

People are free to microwave at a lower power if they wish Rod. Nothing
wrong with increasing the maximum available Mr Speed.

Maybe I don't cook thick enough stuff.

Yep, you vegys don't.

We eat real food Rod,

But not in big enough chunks to
see the effect being discussed.

Fuck off Rod.
 
On Sun, 30 Dec 2018 00:04:06 -0000, trader_4 <trader4@optonline.net> wrote:

On Saturday, December 29, 2018 at 6:37:22 PM UTC-5, trader_4 wrote:
On Saturday, December 29, 2018 at 6:30:41 PM UTC-5, Bill Gill wrote:
On 12/29/2018 12:06 PM, William Gothberg wrote:
On Sat, 29 Dec 2018 18:00:47 -0000, Bill Gill <billnews2@cox.net> wrote:

On 12/29/2018 11:29 AM, William Gothberg wrote:
On 2018-12-29 10:26 a.m., William Gothberg wrote:
On Sat, 29 Dec 2018 14:46:52 -0000, Andy Bennet <andyb@andy.com> wrote:

On 29/12/2018 13:43, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW? They
were invented decades ago.

High power microwaves (>1MW) are used in industry in for example ore
extraction/rock pulverizing.
1MW into a cup of water is not pretty, explodes the water contents and
breaks the cup.

I don't need a MW, but the usual 600W to 900W in domestic ovens is
pitiful. What's wrong with 2kW?

too expensive

1200 watt consumer microwaves are widely available. Check your
Walmart or whatever you have.

1200W isn't much more than the 900W most are.
Let me see: 900 / 1200 = .75.
So a 900 Watt microwave has 3/4 of the power of
a 1200 Watt microwave. Or looking at it the other
way a 1200 Watt microwave has 1/3 more power than
a 900 Watt microwave. That doesn't sound like a
negligible difference. I know when I accidentally
replaced my 1200 Watt unit with an 1100 Watt unit
I noticed the difference. (I didn't look closely
enough when I grabbed it off of the shelf.)

Bill

+1

It's like saying that going 90 mph isn't much more than going 60. Maybe that helps. :)

Typo there, meant 80 versus 60.

It isn't much more, I go 100 in 60 limits.

[crossposts repaired, stop fucking about]
 
On Sun, 30 Dec 2018 11:06:53 +1100, 87213, better known as cantankerous
trolling senile geezer Rot Speed, wrote:

<FLUSH trollshit>

....and much better air in here again!

--
The Natural Philosopher about senile Rot:
"Rod speed is not a Brexiteer. He is an Australian troll and arsehole."
Message-ID: <pu07vj$s5$2@dont-email.me>
 
On Sun, 30 Dec 2018 09:49:05 +1100, 87213, better known as cantankerous
trolling senile geezer Rot Speed, wrote:

<FLUSH the stinking trollshit>

You got a problem with people's killfiles, you ridiculous, nym-shifting,
senile idiot? LOL


--
MrTurnip@down.the.farm about senile Rot Speed:
"This is like having a conversation with someone with brain damage."
MID: <ps10v9$uo2$1@gioia.aioe.org>
 
"William Gothberg" <William_Gothberg@internet.co.is> wrote in message
news:eek:p.zus3lxpe7uplkq@desktop-ga2mpl8.lan...
On Sat, 29 Dec 2018 22:49:05 -0000, 87213 <87213@gmail.com> wrote:



"William Gothberg" <William_Gothberg@internet.co.is> wrote in message
news:eek:p.zusz2vco7uplkq@desktop-ga2mpl8.lan...
On Sat, 29 Dec 2018 21:23:55 -0000, mike <ham789@netzero.net> wrote:

On 12/29/2018 10:16 AM, William Gothberg wrote:
On Sat, 29 Dec 2018 17:38:04 -0000, Clare Snyder <clare@snyder.on.ca
wrote:

On Sat, 29 Dec 2018 08:07:42 -0800, Bob F <bobnospam@gmail.com
wrote:

On 12/29/2018 6:37 AM, trader_4 wrote:
On Saturday, December 29, 2018 at 9:23:42 AM UTC-5, Bill Gill
wrote:
On 12/29/2018 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW?
They
were invented decades ago.
Higher powered microwaves would require higher powered electric
outlets, probably 220VAC (in the USA).

Also it is questionable whether higher powered ovens would be
practical for use. Getting warming times down to a couple of
seconds might not be a good idea. More speed is not always
better.

Bill

+1

That about covers it. Not sure how useful more power would be.
For
example,
last night I was thawing out a tomato sauce in a quart plastic
container.
The Panasonic has a defrost mode that uses about 30% power and
cycles that.


It gets the 30% power by cycling the 100% power on 30% of the time.

(By the way, adjusting the level does not actually change the
wattage.
It simply means the microwave will pulse on and off at its fixed
wattage
until the desired level is reached.)

https://lifehacker.com/5974788/familiarize-yourself-with-your-microwaves-power-settings-to-make-microwave-cooking-a-joy

That was true of the first generation of Microwaves, but the current
"inverter" driver units actually CAN throttle the power. Inverter
microwaves are much better for defrosting AND cooking.

We've had ours for about 2 years now - replacing our original that we
bought in about 1985.

BIG difference (but the old one would likely still be working by the
time this one dies)

Why is it called an invertor? I thought an invertor was a device to
increase the voltage - like running 240V devices off a 12V car
battery.

And why on earth would you not want to cook on full power? I've never
had a reason to lower the power from the maximum of 800W. I want the
meal as soon as possible!

There's been a lot of nitpicking in this thread.

All microwaves reduce power by cycling between 0 and 100% power.
The relative power level is the duty factor of that on/off cycle.

Older microwaves switch the INPUT to the power transformer.
That also runs the filament. The time to heat up the filament
is the limiting factor in how short you can make the on-time.
You get a minimum of about 10 seconds on-time.
That minimum time is plenty to make food explode.

Better microwaves are called "Inverter" microwaves.
I believe they're all licensed from Panasonic.
When I bought mine, it seemed that all the licensees had
dried up leaving Panasonic as the only locally available units.

It's my understanding that they heat the filament independently
and can have very short on-times. Duty factor is the same as
the older microwaves, but the on-time can be much shorter.

Foods don't explode on low power like they used to.

Food is not uniform. The effectiveness of microwaves decreases
as the food thickness increases. There's a thermal time constant.
So, if you cook at lower average power for longer time,
you can warm the inside without seriously overcooking the outside
or having local boiling that makes food explode.

The minimum on-time really helps with that. I haven't had food
explode since I got an Inverter microwave. The defrost cycle
really does work well.

They're slightly more expensive, but it's worth it.

I've never exploded food on a non-invertor microwave.

Try microwaving an egg in its shell sometime.

People are free to microwave at a lower power if they wish Rod. Nothing
wrong with increasing the maximum available Mr Speed.

Maybe I don't cook thick enough stuff.

Yep, you vegys don't.

We eat real food Rod,

But not in big enough chunks to
see the effect being discussed.

I guess this is why my cats shit so much, because there's so little
nutrition in meat that they have to eat so much of it.

Guess again. When humans eat nothing but meat
and some do that, they shit rather less than if the
only eat vegys, much of which doesn't get digested.

Or maybe they should work more on making the microwaves more even so you
don't get so many hotspots.

That's not the problem. The problem is that with something
large like a leg of lamb, the microwaves get absorbed on
the outside so that if you blast it with full power of say 2KW
you will burn the outside and leave the inside uncooked.

Not everything in a microwave is large.

But that's the stuff that wouldn't do as well in a 2KW microwave, stupid.

You're always free to select a different output level for larger pieces of
meat

Says the pathetic excuse for a troll that had previously proclaimed
that there is never any need to have anything less than full power.
 
On Sat, 29 Dec 2018 19:02:23 -0000 (UTC), Andrew Gabriel, yet another
absolutely brain dead, troll-feeeding, senile idiot, blathered:


And in reference to your other post, it's not simply a matter of
dividing the cooking time by two.

It's ONLY a matter of HOW many senile idiots he can bait with his idiotc
trolls, you abysmally stupid senile retard! <tsk>
 
On Sat, 29 Dec 2018 23:37:19 -0000, trader_4 <trader4@optonline.net> wrote:

On Saturday, December 29, 2018 at 6:30:41 PM UTC-5, Bill Gill wrote:
On 12/29/2018 12:06 PM, William Gothberg wrote:
On Sat, 29 Dec 2018 18:00:47 -0000, Bill Gill <billnews2@cox.net> wrote:

On 12/29/2018 11:29 AM, William Gothberg wrote:
On 2018-12-29 10:26 a.m., William Gothberg wrote:
On Sat, 29 Dec 2018 14:46:52 -0000, Andy Bennet <andyb@andy.com> wrote:

On 29/12/2018 13:43, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW? They
were invented decades ago.

High power microwaves (>1MW) are used in industry in for example ore
extraction/rock pulverizing.
1MW into a cup of water is not pretty, explodes the water contents and
breaks the cup.

I don't need a MW, but the usual 600W to 900W in domestic ovens is
pitiful. What's wrong with 2kW?

too expensive

1200 watt consumer microwaves are widely available. Check your
Walmart or whatever you have.

1200W isn't much more than the 900W most are.
Let me see: 900 / 1200 = .75.
So a 900 Watt microwave has 3/4 of the power of
a 1200 Watt microwave. Or looking at it the other
way a 1200 Watt microwave has 1/3 more power than
a 900 Watt microwave. That doesn't sound like a
negligible difference. I know when I accidentally
replaced my 1200 Watt unit with an 1100 Watt unit
I noticed the difference. (I didn't look closely
enough when I grabbed it off of the shelf.)

Bill

+1

It's like saying that going 90 mph isn't much more than going 60. Maybe that helps. :)

As a rule of thumb, I prefer doubling the power/speed/etc. If I'm going to upgrade my computer's CPU, hard disk, etc, I get one that's twice as good. Less than double just ain't impressive. Same goes for cars, a 2 litre engine is more fun than a 1 litre engine, but adding one third? Why bother? 1.0 litre, 1.3 litre, they're both shit.

And whoever keeps deleting the crossposts, fix your newsreader.
 
On Sun, 30 Dec 2018 00:28:25 -0000, Clare Snyder <clare@snyder.on.ca> wrote:

On Sat, 29 Dec 2018 12:27:21 -0600, Arthur Conan Doyle
dont@bother.com> wrote:

"William Gothberg" <William_Gothberg@internet.co.is> wrote:

Why is it called an invertor?

Typical microwaves use fixed AC power to drive the magnetron. Inverter driven
magnetrons use DC power, which can be variable.
No, the inverter still produces AC - but the AC is variable. The AC
in both systems is rectified to DC for the magnetron.

The inverter produces a lot higher frequency AC than line frequency.
High frequency produces a much easier to filter DC .

Plus smaller coils/transformers/inductors required.

[crosspost repaired, stop fucking about]
 
On Sun, 30 Dec 2018 11:36:53 +1100, cantankerous trolling geezer Rot Speed,
the auto-contradicting senile sociopath, blabbered, again:

<FLUSH another 142 lines of stinking trollshit>

--
MrTurnip@down.the.farm about senile Rot Speed:
"This is like having a conversation with someone with brain damage."
MID: <ps10v9$uo2$1@gioia.aioe.org>
 
On 2018-12-29 5:38 p.m., William Gothberg wrote:
On Sun, 30 Dec 2018 00:28:25 -0000, Clare Snyder <clare@snyder.on.ca
wrote:

On Sat, 29 Dec 2018 12:27:21 -0600, Arthur Conan Doyle
dont@bother.com> wrote:

"William Gothberg" <William_Gothberg@internet.co.is> wrote:

Why is it called an invertor?

Typical microwaves use fixed AC power to drive the magnetron.
Inverter driven
magnetrons use DC power, which can be variable.
 No, the inverter still produces AC - but the AC is variable. The AC
in both systems is rectified to DC for the magnetron.

The inverter produces a lot higher frequency AC than line frequency.
High frequency produces a much easier to filter DC .

Plus smaller coils/transformers/inductors required.

[crosspost repaired, stop fucking about]

put you dick in the microwave and see if two minutes is fast enough
 
William Gothberg wrote:
On Sat, 29 Dec 2018 17:38:04 -0000, Clare Snyder <clare@snyder.on.ca
wrote:

On Sat, 29 Dec 2018 08:07:42 -0800, Bob F <bobnospam@gmail.com> wrote:

On 12/29/2018 6:37 AM, trader_4 wrote:
On Saturday, December 29, 2018 at 9:23:42 AM UTC-5, Bill Gill wrote:
On 12/29/2018 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW?  They
were invented decades ago.
Higher powered microwaves would require higher powered electric
outlets, probably 220VAC (in the USA).

Also it is questionable whether higher powered ovens would be
practical for use.  Getting warming times down to a couple of
seconds might not be a good idea.  More speed is not always better.

Bill

+1

That about covers it.  Not sure how useful more power would be.  For
example,
last night I was thawing out a tomato sauce in a quart plastic
container.
The Panasonic has a defrost mode that uses about 30% power and
cycles that.


It gets the 30% power by cycling the 100% power on 30% of the time.

(By the way, adjusting the level does not actually change the wattage.
It simply means the microwave will pulse on and off at its fixed wattage
until the desired level is reached.)

https://lifehacker.com/5974788/familiarize-yourself-with-your-microwaves-power-settings-to-make-microwave-cooking-a-joy

 That was true of the first generation of Microwaves, but the current
"inverter" driver units actually CAN throttle the power. Inverter
microwaves are much better for defrosting AND cooking.

We've had ours for about 2 years now - replacing our original that we
bought in about 1985.

BIG difference (but the old one would likely still be working by the
time this one dies)

Why is it called an invertor?  I thought an invertor was a device to
increase the voltage - like running 240V devices off a 12V car battery.

Why do you persist in posting waffle about which you know absolutely
nothing, twould be better to post on subjects you know or ask and
educate yourself about the other
And why on earth would you not want to cook on full power?  I've never
had a reason to lower the power from the maximum of 800W.  I want the
meal as soon as possible!
 
87213 wrote:
"William Gothberg" <William_Gothberg@internet.co.is> wrote in message
news:eek:p.zusz2vco7uplkq@desktop-ga2mpl8.lan...
On Sat, 29 Dec 2018 21:23:55 -0000, mike <ham789@netzero.net> wrote:

On 12/29/2018 10:16 AM, William Gothberg wrote:
On Sat, 29 Dec 2018 17:38:04 -0000, Clare Snyder <clare@snyder.on.ca
wrote:

On Sat, 29 Dec 2018 08:07:42 -0800, Bob F <bobnospam@gmail.com> wrote:

On 12/29/2018 6:37 AM, trader_4 wrote:
On Saturday, December 29, 2018 at 9:23:42 AM UTC-5, Bill Gill wrote:
On 12/29/2018 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW?
They
were invented decades ago.
Higher powered microwaves would require higher powered electric
outlets, probably 220VAC (in the USA).

Also it is questionable whether higher powered ovens would be
practical for use.  Getting warming times down to a couple of
seconds might not be a good idea.  More speed is not always better.

Bill

+1

That about covers it.  Not sure how useful more power would be.  For
example,
last night I was thawing out a tomato sauce in a quart plastic
container.
The Panasonic has a defrost mode that uses about 30% power and
cycles that.


It gets the 30% power by cycling the 100% power on 30% of the time.

(By the way, adjusting the level does not actually change the
wattage.
It simply means the microwave will pulse on and off at its fixed
wattage
until the desired level is reached.)

https://lifehacker.com/5974788/familiarize-yourself-with-your-microwaves-power-settings-to-make-microwave-cooking-a-joy


 That was true of the first generation of Microwaves, but the current
"inverter" driver units actually CAN throttle the power. Inverter
microwaves are much better for defrosting AND cooking.

We've had ours for about 2 years now - replacing our original that we
bought in about 1985.

BIG difference (but the old one would likely still be working by the
time this one dies)

Why is it called an invertor?  I thought an invertor was a device to
increase the voltage - like running 240V devices off a 12V car battery.

And why on earth would you not want to cook on full power?  I've never
had a reason to lower the power from the maximum of 800W.  I want the
meal as soon as possible!

There's been a lot of  nitpicking in this thread.

All microwaves reduce power by cycling between 0 and 100% power.
The relative power level is the duty factor of that on/off cycle.

Older microwaves switch the INPUT to the power transformer.
That also runs the filament.  The time to heat up the filament
is the limiting factor in how short you can make the on-time.
You get a minimum of about 10 seconds on-time.
That minimum time is plenty to make food explode.

Better microwaves are called "Inverter" microwaves.
I believe they're all licensed from Panasonic.
When I bought mine, it seemed that all the licensees had
dried up leaving Panasonic as the only locally available units.

It's my understanding that they heat the filament independently
and can have very short on-times.  Duty factor is the same as
the older microwaves, but the on-time can be much shorter.

Foods don't explode on low power like they used to.

Food is not uniform.  The effectiveness of microwaves decreases
as the food thickness increases.  There's a thermal time constant.
So, if you cook at lower average power for longer time,
you can warm the inside without seriously overcooking the outside
or having local boiling that makes food explode.

The minimum on-time really helps with that.  I haven't had food
explode since I got an Inverter microwave.  The defrost cycle
really does work well.

They're slightly more expensive, but it's worth it.

I've never exploded food on a non-invertor microwave.

Try microwaving an egg in its shell sometime.

Do it all the time, for ten seconds for one or two eggs to bring to room
temp from the fridge.


Maybe I don't cook thick enough stuff.

Yep, you vegys don't.

Or maybe they should work more on making the microwaves more even so
you don't get so many hotspots.

That's not the problem. The problem is that with something
large like a leg of lamb, the microwaves get absorbed on
the outside so that if you blast it with full power of say 2KW
you will burn the outside and leave the inside uncooked.
 
mike <ham789@netzero.net> wrote:

I believe they're all licensed from Panasonic.
When I bought mine, it seemed that all the licensees had
dried up leaving Panasonic as the only locally available units.

Found a site that said GE and Whirlpool used to license the patent, but no
longer do. Just did a quick Google patent search - there are more than one
related to the use of an inverter to control the magnetron, all held by
different companies.

IIRC patents are only good for 17 years or so. Seems like they would have
expired by now.
 
"FMurtz" <haggisz@hotmail.com> wrote in message
news:%FWVD.127852$gk1.7741@fx47.iad...
William Gothberg wrote:
On Sat, 29 Dec 2018 17:38:04 -0000, Clare Snyder <clare@snyder.on.ca
wrote:

On Sat, 29 Dec 2018 08:07:42 -0800, Bob F <bobnospam@gmail.com> wrote:

On 12/29/2018 6:37 AM, trader_4 wrote:
On Saturday, December 29, 2018 at 9:23:42 AM UTC-5, Bill Gill wrote:
On 12/29/2018 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW?
They
were invented decades ago.
Higher powered microwaves would require higher powered electric
outlets, probably 220VAC (in the USA).

Also it is questionable whether higher powered ovens would be
practical for use. Getting warming times down to a couple of
seconds might not be a good idea. More speed is not always better.

Bill

+1

That about covers it. Not sure how useful more power would be. For
example,
last night I was thawing out a tomato sauce in a quart plastic
container.
The Panasonic has a defrost mode that uses about 30% power and cycles
that.


It gets the 30% power by cycling the 100% power on 30% of the time.

(By the way, adjusting the level does not actually change the wattage.
It simply means the microwave will pulse on and off at its fixed
wattage
until the desired level is reached.)

https://lifehacker.com/5974788/familiarize-yourself-with-your-microwaves-power-settings-to-make-microwave-cooking-a-joy
That was true of the first generation of Microwaves, but the current
"inverter" driver units actually CAN throttle the power. Inverter
microwaves are much better for defrosting AND cooking.

We've had ours for about 2 years now - replacing our original that we
bought in about 1985.

BIG difference (but the old one would likely still be working by the
time this one dies)

Why is it called an invertor? I thought an invertor was a device to
increase the voltage - like running 240V devices off a 12V car battery.

Why do you persist in posting waffle about which you know absolutely
nothing, twould be better to post on subjects you know or ask and educate
yourself about the other

Problem is that the ear to ear dog shit that makes it
completely unemployable stops that from happening.

And why on earth would you not want to cook on full power? I've never
had a reason to lower the power from the maximum of 800W. I want the
meal as soon as possible!
 
"FMurtz" <haggisz@hotmail.com> wrote in message
news:mPWVD.97866$L44.52153@fx07.iad...
87213 wrote:


"William Gothberg" <William_Gothberg@internet.co.is> wrote in message
news:eek:p.zusz2vco7uplkq@desktop-ga2mpl8.lan...
On Sat, 29 Dec 2018 21:23:55 -0000, mike <ham789@netzero.net> wrote:

On 12/29/2018 10:16 AM, William Gothberg wrote:
On Sat, 29 Dec 2018 17:38:04 -0000, Clare Snyder <clare@snyder.on.ca
wrote:

On Sat, 29 Dec 2018 08:07:42 -0800, Bob F <bobnospam@gmail.com
wrote:

On 12/29/2018 6:37 AM, trader_4 wrote:
On Saturday, December 29, 2018 at 9:23:42 AM UTC-5, Bill Gill
wrote:
On 12/29/2018 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW?
They
were invented decades ago.
Higher powered microwaves would require higher powered electric
outlets, probably 220VAC (in the USA).

Also it is questionable whether higher powered ovens would be
practical for use. Getting warming times down to a couple of
seconds might not be a good idea. More speed is not always
better.

Bill

+1

That about covers it. Not sure how useful more power would be.
For
example,
last night I was thawing out a tomato sauce in a quart plastic
container.
The Panasonic has a defrost mode that uses about 30% power and
cycles that.


It gets the 30% power by cycling the 100% power on 30% of the time.

(By the way, adjusting the level does not actually change the
wattage.
It simply means the microwave will pulse on and off at its fixed
wattage
until the desired level is reached.)

https://lifehacker.com/5974788/familiarize-yourself-with-your-microwaves-power-settings-to-make-microwave-cooking-a-joy

That was true of the first generation of Microwaves, but the current
"inverter" driver units actually CAN throttle the power. Inverter
microwaves are much better for defrosting AND cooking.

We've had ours for about 2 years now - replacing our original that we
bought in about 1985.

BIG difference (but the old one would likely still be working by the
time this one dies)

Why is it called an invertor? I thought an invertor was a device to
increase the voltage - like running 240V devices off a 12V car
battery.

And why on earth would you not want to cook on full power? I've never
had a reason to lower the power from the maximum of 800W. I want the
meal as soon as possible!

There's been a lot of nitpicking in this thread.

All microwaves reduce power by cycling between 0 and 100% power.
The relative power level is the duty factor of that on/off cycle.

Older microwaves switch the INPUT to the power transformer.
That also runs the filament. The time to heat up the filament
is the limiting factor in how short you can make the on-time.
You get a minimum of about 10 seconds on-time.
That minimum time is plenty to make food explode.

Better microwaves are called "Inverter" microwaves.
I believe they're all licensed from Panasonic.
When I bought mine, it seemed that all the licensees had
dried up leaving Panasonic as the only locally available units.

It's my understanding that they heat the filament independently
and can have very short on-times. Duty factor is the same as
the older microwaves, but the on-time can be much shorter.

Foods don't explode on low power like they used to.

Food is not uniform. The effectiveness of microwaves decreases
as the food thickness increases. There's a thermal time constant.
So, if you cook at lower average power for longer time,
you can warm the inside without seriously overcooking the outside
or having local boiling that makes food explode.

The minimum on-time really helps with that. I haven't had food
explode since I got an Inverter microwave. The defrost cycle
really does work well.

They're slightly more expensive, but it's worth it.

I've never exploded food on a non-invertor microwave.

Try microwaving an egg in its shell sometime.


Do it all the time, for ten seconds for one or two eggs to bring to room
temp from the fridge.

That's not cooking it.

Just noticed that Laucke also have a Super
Soft bread mix. Have you tried that one ?

Maybe I don't cook thick enough stuff.

Yep, you vegys don't.

Or maybe they should work more on making the microwaves more even so you
don't get so many hotspots.

That's not the problem. The problem is that with something
large like a leg of lamb, the microwaves get absorbed on
the outside so that if you blast it with full power of say 2KW
you will burn the outside and leave the inside uncooked.
 
Rod Speed wrote:
"FMurtz" <haggisz@hotmail.com> wrote in message
news:mPWVD.97866$L44.52153@fx07.iad...
87213 wrote:


"William Gothberg" <William_Gothberg@internet.co.is> wrote in message
news:eek:p.zusz2vco7uplkq@desktop-ga2mpl8.lan...
On Sat, 29 Dec 2018 21:23:55 -0000, mike <ham789@netzero.net> wrote:

On 12/29/2018 10:16 AM, William Gothberg wrote:
On Sat, 29 Dec 2018 17:38:04 -0000, Clare Snyder <clare@snyder.on.ca
wrote:

On Sat, 29 Dec 2018 08:07:42 -0800, Bob F <bobnospam@gmail.com
wrote:

On 12/29/2018 6:37 AM, trader_4 wrote:
On Saturday, December 29, 2018 at 9:23:42 AM UTC-5, Bill Gill
wrote:
On 12/29/2018 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few
kW? They
were invented decades ago.
Higher powered microwaves would require higher powered electric
outlets, probably 220VAC (in the USA).

Also it is questionable whether higher powered ovens would be
practical for use.  Getting warming times down to a couple of
seconds might not be a good idea.  More speed is not always
better.

Bill

+1

That about covers it.  Not sure how useful more power would be.
For
example,
last night I was thawing out a tomato sauce in a quart plastic
container.
The Panasonic has a defrost mode that uses about 30% power and
cycles that.


It gets the 30% power by cycling the 100% power on 30% of the time.

(By the way, adjusting the level does not actually change the
wattage.
It simply means the microwave will pulse on and off at its fixed
wattage
until the desired level is reached.)

https://lifehacker.com/5974788/familiarize-yourself-with-your-microwaves-power-settings-to-make-microwave-cooking-a-joy


 That was true of the first generation of Microwaves, but the
current
"inverter" driver units actually CAN throttle the power. Inverter
microwaves are much better for defrosting AND cooking.

We've had ours for about 2 years now - replacing our original
that we
bought in about 1985.

BIG difference (but the old one would likely still be working by the
time this one dies)

Why is it called an invertor?  I thought an invertor was a device to
increase the voltage - like running 240V devices off a 12V car
battery.

And why on earth would you not want to cook on full power?  I've
never
had a reason to lower the power from the maximum of 800W.  I want the
meal as soon as possible!

There's been a lot of  nitpicking in this thread.

All microwaves reduce power by cycling between 0 and 100% power.
The relative power level is the duty factor of that on/off cycle.

Older microwaves switch the INPUT to the power transformer.
That also runs the filament.  The time to heat up the filament
is the limiting factor in how short you can make the on-time.
You get a minimum of about 10 seconds on-time.
That minimum time is plenty to make food explode.

Better microwaves are called "Inverter" microwaves.
I believe they're all licensed from Panasonic.
When I bought mine, it seemed that all the licensees had
dried up leaving Panasonic as the only locally available units.

It's my understanding that they heat the filament independently
and can have very short on-times.  Duty factor is the same as
the older microwaves, but the on-time can be much shorter.

Foods don't explode on low power like they used to.

Food is not uniform.  The effectiveness of microwaves decreases
as the food thickness increases.  There's a thermal time constant.
So, if you cook at lower average power for longer time,
you can warm the inside without seriously overcooking the outside
or having local boiling that makes food explode.

The minimum on-time really helps with that.  I haven't had food
explode since I got an Inverter microwave.  The defrost cycle
really does work well.

They're slightly more expensive, but it's worth it.

I've never exploded food on a non-invertor microwave.

Try microwaving an egg in its shell sometime.


Do it all the time, for ten seconds for one or two eggs to bring to
room temp from the fridge.

That's not cooking it.
He just said microwaving it

Just noticed that Laucke also have a Super
Soft  bread mix. Have you tried that one ?

Given up for a while, if I see it may try it.

Maybe I don't cook thick enough stuff.

Yep, you vegys don't.

Or maybe they should work more on making the microwaves more even so
you don't get so many hotspots.

That's not the problem. The problem is that with something
large like a leg of lamb, the microwaves get absorbed on
the outside so that if you blast it with full power of say 2KW
you will burn the outside and leave the inside uncooked.
 
"FMurtz" <haggisz@hotmail.com> wrote in message
news:3uXVD.69038$R85.59141@fx03.iad...
Rod Speed wrote:


"FMurtz" <haggisz@hotmail.com> wrote in message
news:mPWVD.97866$L44.52153@fx07.iad...
87213 wrote:


"William Gothberg" <William_Gothberg@internet.co.is> wrote in message
news:eek:p.zusz2vco7uplkq@desktop-ga2mpl8.lan...
On Sat, 29 Dec 2018 21:23:55 -0000, mike <ham789@netzero.net> wrote:

On 12/29/2018 10:16 AM, William Gothberg wrote:
On Sat, 29 Dec 2018 17:38:04 -0000, Clare Snyder
clare@snyder.on.ca
wrote:

On Sat, 29 Dec 2018 08:07:42 -0800, Bob F <bobnospam@gmail.com
wrote:

On 12/29/2018 6:37 AM, trader_4 wrote:
On Saturday, December 29, 2018 at 9:23:42 AM UTC-5, Bill Gill
wrote:
On 12/29/2018 7:43 AM, William Gothberg wrote:
Shouldn't we have faster microwaves by now giving out a few kW?
They
were invented decades ago.
Higher powered microwaves would require higher powered electric
outlets, probably 220VAC (in the USA).

Also it is questionable whether higher powered ovens would be
practical for use. Getting warming times down to a couple of
seconds might not be a good idea. More speed is not always
better.

Bill

+1

That about covers it. Not sure how useful more power would be.
For
example,
last night I was thawing out a tomato sauce in a quart plastic
container.
The Panasonic has a defrost mode that uses about 30% power and
cycles that.


It gets the 30% power by cycling the 100% power on 30% of the
time.

(By the way, adjusting the level does not actually change the
wattage.
It simply means the microwave will pulse on and off at its fixed
wattage
until the desired level is reached.)

https://lifehacker.com/5974788/familiarize-yourself-with-your-microwaves-power-settings-to-make-microwave-cooking-a-joy

That was true of the first generation of Microwaves, but the
current
"inverter" driver units actually CAN throttle the power. Inverter
microwaves are much better for defrosting AND cooking.

We've had ours for about 2 years now - replacing our original that
we
bought in about 1985.

BIG difference (but the old one would likely still be working by
the
time this one dies)

Why is it called an invertor? I thought an invertor was a device to
increase the voltage - like running 240V devices off a 12V car
battery.

And why on earth would you not want to cook on full power? I've
never
had a reason to lower the power from the maximum of 800W. I want
the
meal as soon as possible!

There's been a lot of nitpicking in this thread.

All microwaves reduce power by cycling between 0 and 100% power.
The relative power level is the duty factor of that on/off cycle.

Older microwaves switch the INPUT to the power transformer.
That also runs the filament. The time to heat up the filament
is the limiting factor in how short you can make the on-time.
You get a minimum of about 10 seconds on-time.
That minimum time is plenty to make food explode.

Better microwaves are called "Inverter" microwaves.
I believe they're all licensed from Panasonic.
When I bought mine, it seemed that all the licensees had
dried up leaving Panasonic as the only locally available units.

It's my understanding that they heat the filament independently
and can have very short on-times. Duty factor is the same as
the older microwaves, but the on-time can be much shorter.

Foods don't explode on low power like they used to.

Food is not uniform. The effectiveness of microwaves decreases
as the food thickness increases. There's a thermal time constant.
So, if you cook at lower average power for longer time,
you can warm the inside without seriously overcooking the outside
or having local boiling that makes food explode.

The minimum on-time really helps with that. I haven't had food
explode since I got an Inverter microwave. The defrost cycle
really does work well.

They're slightly more expensive, but it's worth it.

I've never exploded food on a non-invertor microwave.

Try microwaving an egg in its shell sometime.


Do it all the time, for ten seconds for one or two eggs to bring to room
temp from the fridge.

That's not cooking it.
He just said microwaving it

But wouldn't be doing that to his eggs.

Just noticed that Laucke also have a Super
Soft bread mix. Have you tried that one ?

Given up for a while, if I see it may try it.


Maybe I don't cook thick enough stuff.

Yep, you vegys don't.

Or maybe they should work more on making the microwaves more even so
you don't get so many hotspots.

That's not the problem. The problem is that with something
large like a leg of lamb, the microwaves get absorbed on
the outside so that if you blast it with full power of say 2KW
you will burn the outside and leave the inside uncooked.
 
On Sun, 30 Dec 2018 14:09:29 +1100, FMurtz, the notorious, troll-feeding,
senile Ozzietard, babbled again:

Why do you persist in posting waffle about which you know absolutely
nothing, twould be better to post on subjects you know or ask and
educate yourself about the other

Troll-feeding senile idiot STILL hasn't learnt what makes a troll tick! LOL
 
On Sun, 30 Dec 2018 14:38:56 +1100, cantankerous trolling geezer Rot Speed,
the auto-contradicting senile sociopath, blabbered, again:


Problem is that the ear to ear dog shit that makes it
completely unemployable stops that from happening.

And this coming from the obnoxious senile troll who himself keeps
nym-shifting to get out of people's killfiles time and again! LOL

--
Richard addressing Rot Speed:
"Shit you're thick/pathetic excuse for a troll."
MID: <ogoa38$pul$1@news.mixmin.net>
 

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