Author Topic: The Right Question?  (Read 31473 times)

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Re: The Right Question?
« Reply #104 on: December 24, 2015, 09:39:02 am »
what do you mean it's painted? is it resistive or conductive on the inside? a resistive material would be there to avoid e/m wave reflections, just like in waveguides.

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Is the windows on the inner tube the ECC
« Reply #105 on: December 26, 2015, 12:06:04 pm »
i´m thinking of it... the inner tube allow water to come out of it and gas goes into it to be able to go out... so a charged gas passing thru it should equipotentialize with the electrode...

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Adding noise and reverb to the discussion
« Reply #106 on: December 26, 2015, 19:33:50 pm »
Here is some pictures of what i´m talking about...

this is my resonant cavity inside a cage that will allow me to see it inside... the filter is outside...

the cell sits on a square of glass maybe 8mm thick and under is is the bottom case of the cavity,,

my question would be... what sort of equipment i need to find to be able to measure it going? the waves? i thought i would need a turn or a mini antena,, but the frequency of a microwave cannot be saw on a 150MHZ oscilloscope i guess mine is 60MHz 

i measured the cook place of my microwave oven and it seems to have 3 wavelengths so basically when the waves get into the microwave until they get hit by something and absorbed they bounce up and down up to a limit where it get a maximum amplitude,,,

my cage is not made for a particular frequency.. but it may have some resonant frequency modes depending on the frequencies but basically what i want to do is to trap the electromagnetic waves so they don't irradiate to my measurement devices and to me...



Maybe a 1Ghz one... or maybe a spectrum analyzer would be required.. 

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Re: The Right Question?
« Reply #107 on: December 27, 2015, 02:02:24 am »
Microwave ovens don't have resistive paint anywhere they create standing waves, there might be a formula for three dimensions but in 2 dimensions the only thing required to make standing waves is that the length be a multiple of the wavelength.

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Re: The Right Question?
« Reply #108 on: December 27, 2015, 08:29:26 am »
what do you mean it's painted? is it resistive or conductive on the inside? a resistive material would be there to avoid e/m wave reflections, just like in waveguides.

i have found little info about what is the function of the paint.. i read that not totally reflective paint is used to control the Q of the cavity.. maybe to impede too much to accumulate in a non load condition...

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Re: The Right Question?
« Reply #109 on: December 27, 2015, 09:46:37 am »
I have a huge piece of aluminum.. i could use to do a nicer cavity maybe would have a greater Q...

anyone had a thought of the resonant cavity was inside some metal boxed on the buggy... wish i could find how big it was and how it looked inside
« Last Edit: December 27, 2015, 10:43:19 am by sebosfato »

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Re: Adding noise and reverb to the discussion
« Reply #110 on: December 27, 2015, 12:21:16 pm »
Here is some pictures of what i´m talking about...

this is my resonant cavity inside a cage that will allow me to see it inside... the filter is outside...

the cell sits on a square of glass maybe 8mm thick and under is is the bottom case of the cavity,,

my question would be... what sort of equipment i need to find to be able to measure it going? the waves? i thought i would need a turn or a mini antena,, but the frequency of a microwave cannot be saw on a 150MHZ oscilloscope i guess mine is 60MHz 

i measured the cook place of my microwave oven and it seems to have 3 wavelengths so basically when the waves get into the microwave until they get hit by something and absorbed they bounce up and down up to a limit where it get a maximum amplitude,,,

my cage is not made for a particular frequency.. but it may have some resonant frequency modes depending on the frequencies but basically what i want to do is to trap the electromagnetic waves so they don't irradiate to my measurement devices and to me...



Maybe a 1Ghz one... or maybe a spectrum analyzer would be required..

 A Trifield Detector should b all you need The holes in the microwave screen are smaller than any part of the microwave length ...im sure you knew that..just sayin.Im pretty sure acrylic is a great radiation absorbor is it not?

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Re: The Right Question?
« Reply #111 on: December 27, 2015, 13:01:44 pm »
water may be.. acrylic i´m not sure either... yes i knew the wave size is bigger than the holes thats why i added that screen so i could observe from outside without let they out...

Thanks man about the triflel idea i will check what it is...