Has anyone ever tried to put a target ID meter on a pulse....

[Ivan]

....... detector? Seems like a good idea...................why can't it be done?????

 

[Dave J.]

I did it back in the late 1980's working for the "old Fisher". Fully static (non-motion), ground balanced, ran on a 9 volt rectangular battery. We called it "Bipulse 9". When it was basically ready for production, we showed it to the distributors to get their thumbs up. When they saw it and got to play with it, they said "we don't want to ever see this again". It was good advice and we heeded it.

The good news is that it worked, and the bad news is that the whole overall design concept was wrong (and in my defense, not my idea). With this stumbling block removed, we switched back to multiple frequency development (which had been abandoned in the interim while we chased PI for the wrong reasons). And in 1991 we unveiled the CZ. It's been in production virtually unchanged for 19 years.

--Dave J.

 

[Eric Foster]

Take two fairly close samples and divide the first by the second. Most coins and rings that have one exponential will give a single number result that can be displayed on a meter or other type of indicator. The number is independant of range except at the extremes of saturation, or if the second sample is too far down into the noise. In practice you would have a threshold circuit above and below which the result is blanked. Does it work? Yes, tried it around 1980. Why isn't it used now? Don't know.

Eric.

 

[JCPinCt]

Kind of sad that you didn't put one out that could be used on your pulse machines. I think it could have been done in the style of the meters on the Sovereigns in which you could just wire them in between the coil connections when you wanted to use them. I sure think it would help in IDing the trash to some degree.

 

[Eric Foster]

Hi JCP,

When I can find a spare moment I will give it a try. It might work with a GS5 or a TDI, but it is not a simple matter of connecting something across the coil circuit.

Eric.