Dear elhit
I do not want to offend you. If you think so I apologize.
I just follow logic.
I saw such a real camera many years ago.
I did not open it, I was just experimenting, that was the deal.
The one who made it was an amateur.
Of course it was not possible to build a vacuum tube or generator at very high frequencies.
I am sure of this from my experience!
And yet it made a perfect depiction of buried objects buried by me at a shallow depth.
And I ask you.
Does not require special specifications, but is a simple construction with small extra tips?
As I have written I have understood "what the camera sees".
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