Re: Microwave questions:

[Bernard Cleyet <anngeorg@PACBELL.NET>]

I sent this over a day ago and still hadn't appeared so I re-send:



Not being satisfied w/ VF's answer * ,  I searched.  It appears to be a
matching device  -- and maybe? provide some isolation, tho, the one's
I'm familiar w/ require a ferrite in a mag. field.  One of the baffles
(we have four ovens) reminds me of a directional coupler w/o the absorber.

The correct thickness and / or dielectric constant of the food container
also matches!   Mmmm, another science fair project.  does food reflect
so much that an anti-reflection layer will help?


* Food in the rigid co-ax would be a problem, but it'd have to get past
the dielectric cover, furthermore, food especially liquids can easily
get around the baffle.


bc

Frohne, Vickie wrote:

> The baffle may help to distribute the microwaves evenly around the ov=
> en, or to keep splattered food out of the magnetron, or both.  Microw=
> ave ovens also often have fans in front of the magnetron opening into=
> the oven cavity. The purpose of these isn't to cool the magnetron, b=
> ut to serve as rotating microwave reflectors. These keep the oven fro=
> m having "hot spots" and "cold spots" due to standing waves, and help=
> the food cook more evenly.=20
>
> Vickie
>
> -----Original Message-----
> =46rom: Forum for Physics Educators on behalf of Bernard Cleyet
> Sent: Wed 10/13/2004 11:27 AM
> To: PHYS-L@LISTS.NAU.EDU
> Subject: Microwave questions:
> =20
> People!
>
> In microwave mischiefing, I discovered ovens have a baffle in front o=
> f
> the magnetron output.  What's its purpose, and will removing it have =
> a
> deleterious effect on the magnetron ?
>
>
> Is there an easy method to synchronize magnetrons, i.e. without redes=
> ign.
>
> bc