What is next???

[Steve(MS)]

The comment about the 100kHz got my attention. The older TR design is still king in iron trash. It seems to me that motion based detectors has it's problems in iron laden areas. I came up with a test that gives motion based detectors fits and it goes like this. Place 4-3 1/2 inch nails in a square pattern and then place coin(s) in the middle of them and see if the nails can be rejected and the coin be detected. It seems that two nails at 90 degrees with a non-ferrous item very close by is a hard task for them. If just one coin and a nail is placed on top it, then sweeping across the nail, many detectors will give a signal but if one sweeps across the length of the nail in the same experiment many units will not respond to the coin and adding nails nearby will only make it worse. The point of all of this is that motion detectors as a whole do well in with non-ferrous trashy areas but still need be improved when it comes to iron trashy areas. A small coil on them is a must in such areas and will improve performance. As far as I know, the 100 kHz TR units use no disc circuits as such and I can add 2 more nails across the top of the coin in the square pattern and still get a signal with the 100 kHz detector, try that with any motion detector and see what happens, it would be nice if a manufacturer would develop the 100 kHz with todays technology. There is no telling what is still underground where iron nails are in high concentrations.

 

[Low-Boy/LCPM]

that is the idea do something that works and use it when needed. The DFX has two freq you can use them together or apart. So give us one detector that we can use for iron and then parks and schools and relic hunting. We demand something different!!!!

 

[jbow]

n/t

 

[jbow]

n/t