This is what I think of as a magnetron, as used in conventional microwave ovens with a turntable:
http://www.hokuto.co.jp/eng/products...dex_img_01.gif
It's about the size of a fist. So how do they make them flat under the food cavity in flatbed ovens? Does the magnetron sit under there and is redesigned to be flat? Or is there some kind of fancy rotating waveguide, and the magnetron sits at the side as before?

--
Kakistocracy - Government by the least qualified or most unprincipled citizens.
http://www.thefreedictionary.com/kakistocracy

On Friday, 1 June 2018 15:23:49 UTC+1, Jimmy Wilkinson Knife wrote:
So how do they make them flat under the food cavity in flatbed ovens?
Does the magnetron sit under there and is redesigned to be flat? Or
is there some kind of fancy rotating waveguide, and the magnetron sits
at the side as before?

I asked Mr Google that exact question, and Mr Google said:

With the Flatbed microwave the microwaves are emitted from a rotating antenna located underneath the base of your microwave. The microwaves still bounce around the cavity but at slightly different angles to the turntable microwave.

http://eng-au.faq.panasonic.com/app/...tbed-microwave.

Why do the flatbed microwave times vary compared to turntable ovens?

Please note that this product uses bottom feeding technology for microwave distribution which differs from traditional turntable side feeding methods and creates more useable space for a variety of different sized dishes.
With the flatbed style you may notice a difference in heating times (in microwave mode) when compared against side feeding appliances.
This is quite normal and should not cause any concern. One way to overcome this is to use a cooking trivett to place under your dish.

Owain

On Fri, 01 Jun 2018 16:13:58 +0100, wrote:

On Friday, 1 June 2018 15:23:49 UTC+1, Jimmy Wilkinson Knife wrote:
So how do they make them flat under the food cavity in flatbed ovens?
Does the magnetron sit under there and is redesigned to be flat? Or
is there some kind of fancy rotating waveguide, and the magnetron sits
at the side as before?

I asked Mr Google that exact question, and Mr Google said:

With the Flatbed microwave the microwaves are emitted from a rotating antenna located underneath the base of your microwave. The microwaves still bounce around the cavity but at slightly different angles to the turntable microwave.

http://eng-au.faq.panasonic.com/app/...tbed-microwave.

Why do the flatbed microwave times vary compared to turntable ovens?

Please note that this product uses bottom feeding technology for microwave distribution which differs from traditional turntable side feeding methods and creates more useable space for a variety of different sized dishes.
With the flatbed style you may notice a difference in heating times (in microwave mode) when compared against side feeding appliances.
This is quite normal and should not cause any concern. One way to overcome this is to use a cooking trivett to place under your dish.

Thjat's precisely the site I read before asking in here. That doesn't say how they get the magnetron to fit though.

--
In the UK, 17% of employees are health and safety officers.
Say NO! to health and safety in the workplace, before there are no real workers left!
Look out for yourself and stop blaming each other like 6 year olds!

On Fri, 1 Jun 2018 08:13:58 -0700 (PDT), s ,
another mentally deficient, troll-feeding Google groper, blabbered:


I asked Mr Google that exact question, and Mr Google said:

"Mr Google"? What a blithering senile IDIOT! tsk

Back many years ago this idea was tried by Philips, their microwaves with
the drop down door, and with rotating aerial rather than a turntable. to be
quite honest it was rubbish and left cold spots in the food so you still had
to stop and turn the food.

I think the mistake is that the cavity is not moved in relation to the food
so standing waves still exist in the same places and only moving the food
relative to those is a true answer to this.
End of story.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
wrote in message
...
On Friday, 1 June 2018 15:23:49 UTC+1, Jimmy Wilkinson Knife wrote:
So how do they make them flat under the food cavity in flatbed ovens?
Does the magnetron sit under there and is redesigned to be flat? Or
is there some kind of fancy rotating waveguide, and the magnetron sits
at the side as before?

I asked Mr Google that exact question, and Mr Google said:

With the Flatbed microwave the microwaves are emitted from a rotating
antenna located underneath the base of your microwave. The microwaves
still bounce around the cavity but at slightly different angles to the
turntable microwave.

http://eng-au.faq.panasonic.com/app/...tbed-microwave.

Why do the flatbed microwave times vary compared to turntable ovens?

Please note that this product uses bottom feeding technology for microwave
distribution which differs from traditional turntable side feeding methods
and creates more useable space for a variety of different sized dishes.
With the flatbed style you may notice a difference in heating times (in
microwave mode) when compared against side feeding appliances.
This is quite normal and should not cause any concern. One way to
overcome this is to use a cooking trivett to place under your dish.

Owain

That doesn't make sense. Spinning the pattern of microwave radiation must be identical to spinning the food. In both cases they are rotated in relation to one another.


On Fri, 01 Jun 2018 21:25:40 +0100, Brian Gaff wrote:

Back many years ago this idea was tried by Philips, their microwaves with
the drop down door, and with rotating aerial rather than a turntable. to be
quite honest it was rubbish and left cold spots in the food so you still had
to stop and turn the food.

I think the mistake is that the cavity is not moved in relation to the food
so standing waves still exist in the same places and only moving the food
relative to those is a true answer to this.
End of story.
Brian



--
Bumper sticker: "Help! She's farted and I can't get out."

On Friday, 1 June 2018 21:32:34 UTC+1, Jimmy Wilkinson Knife wrote:
On Fri, 01 Jun 2018 21:25:40 +0100, Brian Gaff wrote:

Back many years ago this idea was tried by Philips, their microwaves with
the drop down door, and with rotating aerial rather than a turntable. to be
quite honest it was rubbish and left cold spots in the food so you still had
to stop and turn the food.

I think the mistake is that the cavity is not moved in relation to the food
so standing waves still exist in the same places and only moving the food
relative to those is a true answer to this.
End of story.
Brian

That doesn't make sense. Spinning the pattern of microwave radiation must be identical to spinning the food. In both cases they are rotated in relation to one another.

not identical at all. turntables produce much better evenness than stirrers. Both together are best.


NT

On Fri, 1 Jun 2018 18:12:06 -0700 (PDT), , another
mentally challenged, troll-feeding idiot, driveled again:



not identical at all. turntables produce much better evenness than
stirrers. Both together are best.

NT

There's nothing better together than a troll and his troll-feeding
counterpart, right, you troll-feeding senile moron?

On Sat, 02 Jun 2018 02:12:06 +0100, wrote:

On Friday, 1 June 2018 21:32:34 UTC+1, Jimmy Wilkinson Knife wrote:
On Fri, 01 Jun 2018 21:25:40 +0100, Brian Gaff wrote:

Back many years ago this idea was tried by Philips, their microwaves with
the drop down door, and with rotating aerial rather than a turntable. to be
quite honest it was rubbish and left cold spots in the food so you still had
to stop and turn the food.

I think the mistake is that the cavity is not moved in relation to the food
so standing waves still exist in the same places and only moving the food
relative to those is a true answer to this.
End of story.
Brian

That doesn't make sense. Spinning the pattern of microwave radiation must be identical to spinning the food. In both cases they are rotated in relation to one another.

not identical at all. turntables produce much better evenness than stirrers. Both together are best.

As I said, it's relative. The food and the microwave pattern are relative to each other. Where the oven is and where the kitchen is don't matter. If you rotate the food, or rotate the microwave pattern, PRECISELY the same effect is achieved.

--
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Husband to wife: "Golfing with friends, my dear."
Wife to husband: "What? At 2A.M.?!"
Husband to wife: "Yes, We used night clubs."

This is what I think of as a magnetron, as used in conventional microwave ovens with a turntable:
http://www.hokuto.co.jp/eng/products...dex_img_01.gif
It's about the size of a fist. So how do they make them flat under the food cavity in flatbed ovens? Does the magnetron sit under there and is redesigned to be flat? Or is there some kind of fancy rotating waveguide, and the magnetron sits at the side as before?


Basically the later I should think.

The one I had in the 1980s had a large aperture covered with mica on
the roof of the cooking cavity. The Magnetron was at the side of the
cavity with a brass wave guide leading up to the top. A squirrel-cage
fan blows air up the wave guide and not only cools the Magnetron, but
also rotates a paddle-wheel at the top, a rotating antenna, carrying
multiple reflectors thar distribute the radiation throughout the
cavity. I imagine modern bottom entry ones do a similar trick, but I
have yet to work on one.

--

Graham.
%Profound_observation%

On Fri, 01 Jun 2018 16:21:19 +0100, Graham. wrote:

This is what I think of as a magnetron, as used in conventional microwave ovens with a turntable:
http://www.hokuto.co.jp/eng/products...dex_img_01.gif
It's about the size of a fist. So how do they make them flat under the food cavity in flatbed ovens? Does the magnetron sit under there and is redesigned to be flat? Or is there some kind of fancy rotating waveguide, and the magnetron sits at the side as before?


Basically the later I should think.

The one I had in the 1980s had a large aperture covered with mica on
the roof of the cooking cavity. The Magnetron was at the side of the
cavity with a brass wave guide leading up to the top. A squirrel-cage
fan blows air up the wave guide and not only cools the Magnetron, but
also rotates a paddle-wheel at the top, a rotating antenna, carrying
multiple reflectors thar distribute the radiation throughout the
cavity. I imagine modern bottom entry ones do a similar trick, but I
have yet to work on one.

I didn't realise they were available in 1980. So why aren't they all like that? Does it add a lot to the price?

--
"Flashlights are tubular metal containers kept in a flight bag for the purpose of storing dead batteries."

On Fri, 01 Jun 2018 16:21:19 +0100, Graham. wrote:

This is what I think of as a magnetron, as used in conventional microwave ovens with a turntable:
http://www.hokuto.co.jp/eng/products...dex_img_01.gif
It's about the size of a fist. So how do they make them flat under the food cavity in flatbed ovens? Does the magnetron sit under there and is redesigned to be flat? Or is there some kind of fancy rotating waveguide, and the magnetron sits at the side as before?


Basically the later I should think.

The one I had in the 1980s had a large aperture covered with mica on
the roof of the cooking cavity. The Magnetron was at the side of the
cavity with a brass wave guide leading up to the top. A squirrel-cage
fan blows air up the wave guide and not only cools the Magnetron, but
also rotates a paddle-wheel at the top, a rotating antenna, carrying
multiple reflectors thar distribute the radiation throughout the
cavity. I imagine modern bottom entry ones do a similar trick, but I
have yet to work on one.

I didn't realise they were available in 1980. So why aren't they all like that? Does it add a lot to the price?

The one we had is in the last illustration on this page

https://www.photomemorabilia.co.uk/P...iterature.html

I've still got the 170 page hard-back cookery book.
--

Graham.
%Profound_observation%

On Fri, 01 Jun 2018 18:13:54 +0100, Graham. wrote:

On Fri, 01 Jun 2018 16:21:19 +0100, Graham. wrote:

This is what I think of as a magnetron, as used in conventional microwave ovens with a turntable:
http://www.hokuto.co.jp/eng/products...dex_img_01.gif
It's about the size of a fist. So how do they make them flat under the food cavity in flatbed ovens? Does the magnetron sit under there and is redesigned to be flat? Or is there some kind of fancy rotating waveguide, and the magnetron sits at the side as before?


Basically the later I should think.

The one I had in the 1980s had a large aperture covered with mica on
the roof of the cooking cavity. The Magnetron was at the side of the
cavity with a brass wave guide leading up to the top. A squirrel-cage
fan blows air up the wave guide and not only cools the Magnetron, but
also rotates a paddle-wheel at the top, a rotating antenna, carrying
multiple reflectors thar distribute the radiation throughout the
cavity. I imagine modern bottom entry ones do a similar trick, but I
have yet to work on one.

I didn't realise they were available in 1980. So why aren't they all like that? Does it add a lot to the price?

The one we had is in the last illustration on this page

https://www.photomemorabilia.co.uk/P...iterature.html

I've still got the 170 page hard-back cookery book.

Bloody hell, those look like very well made and very expensive(?) products.

--
A guy bought his wife a beautiful diamond ring for Christmas.
A friend of his said, "I thought she wanted one of those sporty 4-Wheel drive vehicles."
"She did," he replied. "But where in the hell was I gonna find a fake Jeep?"

On 01/06/2018 18:13, Graham. wrote:
On Fri, 01 Jun 2018 16:21:19 +0100, Graham. wrote:

This is what I think of as a magnetron, as used in conventional microwave ovens with a turntable:
http://www.hokuto.co.jp/eng/products...dex_img_01.gif
It's about the size of a fist. So how do they make them flat under the food cavity in flatbed ovens? Does the magnetron sit under there and is redesigned to be flat? Or is there some kind of fancy rotating waveguide, and the magnetron sits at the side as before?


Basically the later I should think.

The one I had in the 1980s had a large aperture covered with mica on
the roof of the cooking cavity. The Magnetron was at the side of the
cavity with a brass wave guide leading up to the top. A squirrel-cage
fan blows air up the wave guide and not only cools the Magnetron, but
also rotates a paddle-wheel at the top, a rotating antenna, carrying
multiple reflectors thar distribute the radiation throughout the
cavity. I imagine modern bottom entry ones do a similar trick, but I
have yet to work on one.

I didn't realise they were available in 1980. So why aren't they all like that? Does it add a lot to the price?

The one we had is in the last illustration on this page

https://www.photomemorabilia.co.uk/P...iterature.html

I've still got the 170 page hard-back cookery book.


That looks quite a sophisticated one for the early 80s. We bought one
around 1981 and it had just a simple turn and 'run back' timer. It did
last about 17 years, with only a couple of O rings in the turn table
drive. We only disposed of it as it started to look tatty.

We've had several since, none have lasted so well.



--

Suspect someone is claiming a benefit under false pretences? Incapacity
Benefit or Personal Independence Payment when they don't need it? They
are depriving those in real need!

https://www.gov.uk/report-benefit-fraud

On Fri, 01 Jun 2018 19:06:45 +0100, Brian Reay wrote:

On 01/06/2018 18:13, Graham. wrote:
On Fri, 01 Jun 2018 16:21:19 +0100, Graham. wrote:

This is what I think of as a magnetron, as used in conventional microwave ovens with a turntable:
http://www.hokuto.co.jp/eng/products...dex_img_01.gif
It's about the size of a fist. So how do they make them flat under the food cavity in flatbed ovens? Does the magnetron sit under there and is redesigned to be flat? Or is there some kind of fancy rotating waveguide, and the magnetron sits at the side as before?


Basically the later I should think.

The one I had in the 1980s had a large aperture covered with mica on
the roof of the cooking cavity. The Magnetron was at the side of the
cavity with a brass wave guide leading up to the top. A squirrel-cage
fan blows air up the wave guide and not only cools the Magnetron, but
also rotates a paddle-wheel at the top, a rotating antenna, carrying
multiple reflectors thar distribute the radiation throughout the
cavity. I imagine modern bottom entry ones do a similar trick, but I
have yet to work on one.

I didn't realise they were available in 1980. So why aren't they all like that? Does it add a lot to the price?

The one we had is in the last illustration on this page

https://www.photomemorabilia.co.uk/P...iterature.html

I've still got the 170 page hard-back cookery book.


That looks quite a sophisticated one for the early 80s. We bought one
around 1981 and it had just a simple turn and 'run back' timer. It did
last about 17 years, with only a couple of O rings in the turn table
drive. We only disposed of it as it started to look tatty.

We've had several since, none have lasted so well.

I once had a microwave that decided to run continuously for no reason, I think some water got through into the workings underneath. Maybe it was just the motor, but I couldn't be bothered as it was a cheap oven so I threw it out. I should have had a look inside.

--
"Flashlights are tubular metal containers kept in a flight bag for the purpose of storing dead batteries."

"Brian Reay" wrote in message
news
On 01/06/2018 18:13, Graham. wrote:
On Fri, 01 Jun 2018 16:21:19 +0100, Graham.
wrote:

This is what I think of as a magnetron, as used in conventional
microwave ovens with a turntable:
http://www.hokuto.co.jp/eng/products...dex_img_01.gif
It's about the size of a fist. So how do they make them flat under
the food cavity in flatbed ovens? Does the magnetron sit under there
and is redesigned to be flat? Or is there some kind of fancy rotating
waveguide, and the magnetron sits at the side as before?


Basically the later I should think.

The one I had in the 1980s had a large aperture covered with mica on
the roof of the cooking cavity. The Magnetron was at the side of the
cavity with a brass wave guide leading up to the top. A squirrel-cage
fan blows air up the wave guide and not only cools the Magnetron, but
also rotates a paddle-wheel at the top, a rotating antenna, carrying
multiple reflectors thar distribute the radiation throughout the
cavity. I imagine modern bottom entry ones do a similar trick, but I
have yet to work on one.

I didn't realise they were available in 1980. So why aren't they all
like that? Does it add a lot to the price?

The one we had is in the last illustration on this page

https://www.photomemorabilia.co.uk/P...iterature.html

I've still got the 170 page hard-back cookery book.


That looks quite a sophisticated one for the early 80s. We bought one
around 1981 and it had just a simple turn and 'run back' timer. It did
last about 17 years, with only a couple of O rings in the turn table
drive. We only disposed of it as it started to look tatty.

I'm still using the Sharp I bought in 73 almost every day.

It does have a proper electronic control and display.

Never had to do a thing to it.

Corse now it will curl up and die and it will be your fault.

We've had several since, none have lasted so well.

On Fri, 01 Jun 2018 18:13:54 +0100, Graham., yet another braindead,
troll-feeding senile idiot, blathered:

The one we had is in the last illustration on this page

You've been had by the dumbest troll these groups have ever seen, you brain
dead idiot!

On Fri, 01 Jun 2018 16:21:19 +0100, Graham., yet another braindead,
troll-feeding senile idiot, blathered:

Basically the later I should think.

Basically you ARE a senile troll-feeding moron!

On Fri, 01 Jun 2018 15:23:45 +0100, Birdbrain Macaw (now "James Wilkinson"),
the pathological attention whore of all the uk ngs, blathered again:

FLUSH the abnormal sociopathic attention whore's latest idiotic
attention-baiting bull**** unread again

--
Tony944 addressing Birdbrain Macaw:
"I seen and heard many people but you are on top of list being first class
ass hole jerk. ...You fit under unconditional Idiot and should be put in
mental institution.
MID:

--
Pelican to Birdbrain Macaw:
"Ok. I'm persuaded . You are an idiot."
MID:

--
DerbyDad03 addressing Birdbrain Macaw (now "James Wilkinson" LOL):
"Frigging Idiot. Get the hell out of my thread."
MID:

--
Kerr Mudd-John about Birdbrain Macaw (now "James Wilkinson" LOL):
"It's like arguing with a demented frog."
MID:

--
Mr Pounder Esquire about Birdbrain Macaw (now "James Wilkinson" LOL):
"the **** poor delivery boy with no hot running water, 11 cats and
several parrots living in his hovel."
MID:

--
Rob Morley about Birdbrain:
"He's a perennial idiot"
MID: 20170519215057.56a1f1d4@Mars

--
JoeyDee to Birdbrain
"I apologize for thinking you were a jerk. You're just someone with an IQ
lower than your age, and I accept that as a reason for your comments."
MID: l-september.org

--
Sam Plusnet about Birdbrain (now "James Wilkinson Sword" LOL):
"He's just desperate to be noticed. Any attention will do, no matter how
negative it may be."
MID:

--
asking Birdbrain:
"What, were you dropped on your head as a child?"
MID:

--
Christie addressing endlessly driveling Birdbrain Macaw (now "James
Wilkinson" LOL):
"What are you resurrecting that old post of mine for? It's from last
month some time. You're like a dog who's just dug up an old bone they
hid in the garden until they were ready to have another go at it."
MID:

--
Mr Pounder's fitting description of Birdbrain Macaw:
"You are a well known fool, a tosser, a pillock, a stupid unemployable
sponging failure who will always live alone and will die alone. You will not
be missed."
MID:

--
Richard to pathetic ****** Hucker:
"You haven't bred?
Only useful thing you've done in your pathetic existence."
MID:

--
about Birdbrain (now "James Wilkinson" LOL):
""not the sharpest knife in the drawer"'s parents sure made a serious
mistake having him born alive -- A total waste of oxygen, food, space,
and bandwidth."
MID:

--
Mr Pounder exposing sociopathic Birdbrain:
"You will always be a lonely sociopath living in a ******** with no hot
running water with loads of stinking cats and a few parrots."
MID:

--
francis about Birdbrain (now "James Wilkinson" LOL):
"He seems to have a reputation as someone of limited intelligence"
MID:

--
Peter Moylan about Birdbrain (now "James Wilkinson" LOL):
"If people like JWS didn't exist, we would have to find some other way to
explain the concept of "invincible ignorance"."
MID:

Fancy roatting waveguide, how do you think radar sets do it?
Blimey, you is gettin worse wiv your silly kwesteongs.
Brian

--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please!
"Jimmy Wilkinson Knife" wrote in message
news
This is what I think of as a magnetron, as used in conventional microwave
ovens with a turntable:
http://www.hokuto.co.jp/eng/products...dex_img_01.gif
It's about the size of a fist. So how do they make them flat under the
food cavity in flatbed ovens? Does the magnetron sit under there and is
redesigned to be flat? Or is there some kind of fancy rotating waveguide,
and the magnetron sits at the side as before?

--
Kakistocracy - Government by the least qualified or most unprincipled
citizens.
http://www.thefreedictionary.com/kakistocracy

I have no experience of radar sets. And google did not explain the inner workings of a microwave. I just got adverts from manufacturers saying how the cooking was easier and better.

On Fri, 01 Jun 2018 21:21:22 +0100, Brian Gaff wrote:

Fancy roatting waveguide, how do you think radar sets do it?
Blimey, you is gettin worse wiv your silly kwesteongs.
Brian



--
The true mark of a civilized society is when its citizens know how to hate each other peacefully.

On Fri, 1 Jun 2018 21:21:22 +0100, Brian Daft, the notorious, obviously
mentally deficient, troll-feeding senile idiot, blabbered again:

Fancy roatting waveguide, how do you think radar sets do it?
Blimey, you is gettin worse wiv your silly kwesteongs.
Brian

Trust that you brain dead idiot will not miss out on feeding him! tsk