Quote:
Originally Posted by Sean_Goddard
Looking at the probe I'm thinking of a way to detect anomalies in the surrounding voltage field of possible targets. If you chop the input to the primary at say 59KHz (I think you said that was a Gold frequency) then have a narrow band filter on the secondary, you could monitor the AVERAGE field and look for slight changes.
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The more serious schematics i have seen before all rely on this principle.
The problem with averaging a signal and staynig always at the edge of triggering is that you end with a random beeping that your mind can associate to targets....
Quote:
Originally Posted by Sean_Goddard
OMG I'd completely forgotten about Telluric currents!! One further thought, with all the RF and LF signals pumped out by te human race these days, might they not also cause some interaction with a "desired" target? See the Compass Depth Enhancer. Also I have found that searching with a conventional metal detector in a field that has an active electric fence around it, I get a LOT more depth (and ear bashing), but the depth is a DEFINATE 1.5 to 2X normal. I wonder if;
1) The targets are being "precharged" in some way.
2) The ground is "ringing" and thus so are the targets.
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I think the signals to be detected are variable (AC),so they must come from external source.
You electric fence observation is very interesting and should be better documented,to avoid "mind effects" and for example to see how long after turning up the fence and after turning it off the effect remains.
Quote:
Originally Posted by hung
If you are a 'real' electronics engineer with some serious research attitude, then Esteban's hints are more than enough for you to start your own thing. In fact I should prevent Esteban of quiting posting even half schematics as there are the risks involved as we have already discussed.
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-If it is so simple why not to post it anyway ?
-Why Esteban must obey you so quickly ? Are you is boss or superior to him ?