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Phase Readout Gradiometer PRG]

A

Anonymous

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From my reading of years ago these are the creme-de-la-creme of Target i.d. detectors. But were expensive and stuck in a "closet" and never reappeared. Surely with todays technology, there sould be a horse race to see who fields one first. How do they work differently than a modern motion TID?
 
The DFX has a design based on frequency domain which are phase angles for discrimination for TID purposes. The Explorer11 is time domain and uses temporal evolution of signals. Back with the Phase Readout Gradiometer the microprocessor and digital circuits were a curse to the cost. I think most FD detector have this pretty much covered and as far as I can tell TD machine go a step further with advanced pulse induction.
 
Cody, The PRG came out in 1974, so there are no microprocessors or digital displays! As far as I can tell it was the 1st TID detector!. It was a basicly a TR with a numeric meter which read the targets conductivity! Not many were made!............Joe
 
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