Pretty sure these consumer grade microwave ovens are robust from mismatch
issues.
They have to be considering all the different loads you can put in the oven.
An open waveguide is actually a pretty good antenna with a return loss of
around 10 dB. But then it is piped into a box that is totally reflective. In
my case I aim the field at a layer of silicon carbide to absorb the energy and
convert it to heat.
From: Jan-GAMs
Sent: Saturday, January 1, 2022 8:14 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] OT having fun
Yeah, and it's likely to blow the magnatron from the VSWR mismatch. It's been
50 years since I worked with that stuff and had the fancy government tools.
Kind of miss it.
On 1/1/22 18:50, Chuck McCown via AF wrote:
If you get hit from an open waveguide it feels like flame.
From: Jan-GAMs
Sent: Saturday, January 1, 2022 5:03 PM
To: af@af.afmug.com
Subject: Re: [AFMUG] OT having fun
1250 watts of 5GHz radiation or 2GHz of radiation (whichever spectrum it was
designed for) is damn dangerous if not shielded. I knew people who died from
that. Someone turned on a radar while the array was being worked on. He died.
You could pull a Daniel Jackson, but Olma won't ascend you.
On 1/1/22 09:04, Chuck McCown via AF wrote:
Yeah, I have a radiation alarm. It was going off continually, for a moment
I thought it was defective.
Turns out I had a thermocouple wire leaking some RF. Burnt the piss out of
my fingers, like picking up a red hot paper clip. Shut off the magnetron and
the wire was totally cool to the touch. Bit of aluminum foil as a choke and
all was well. Next step is coupling a second magnetron to this cavity.
From: Jan-GAMs
Sent: Saturday, January 1, 2022 4:08 AM
To: af@af.afmug.com
Subject: Re: [AFMUG] OT having fun
the warning about eyes and testes should be noted.
https://www.fda.gov/radiation-emitting-products/resources-you-radiation-emitting-products/microwave-oven-radiation
On 12/31/21 16:48, Jaime Solorza wrote:
Pee on it...it works
On Fri, Dec 31, 2021, 1:37 PM Chuck McCown via AF <af@af.afmug.com> wrote:
Got a pretty bad RF burn from some leakage. No blister.
Sent from my iPhone
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