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Goldquest Clarification

A

Anonymous

Guest
Clarification
Governing by the number, and type of post/emails I am reading, some clarification is needed about the new Goldquest PI detector.
The unit has been field tested in nugget hunting areas with very positive results, but like all detectors, it has it
 
From the reports I have had, it does appear that the low power transmitter and the short (30uS) transmitter pulse, do result in considerably less signal from the ground than the high power PI's. This is to the degree that the Goldquest will work on ground that is very difficult for VLF's. However, the detection range on nuggets has not been reduced to anywhere near the same degree, and a US nickel can be air tested at over 14in. I have a range of nuggets from 4gms downwards so I will post some air ranges shortly. However, as I posted on the Finders gold forum, nuggets vary widely in their composition and conductivity, so any figures will only be a very rough guide.
Eric.
 
Eric,
The short transmit pulses should cause the ground signal to decay faster than the longer transmit pulses.
OK, how about stepping the transmit pulses through ten different lengths. OK so we transmit a pulse of 30uS, - 50uS, - 70uS, - 90uS, - 110uS, - 130uS, - 150uS, 170uS, 190uS, and 210uS.
The different widths can easily be accomplished by using a CMOS 4017 as a sequencer.
OK, the ground signals will have different delays for each width of transmit pulse. Conductive targets will have the same decay regardless of the width of the transmit pulse.
From here,it is pretty easy to figure out how to make a really good ground balance detector.
This method provides a lot of information about the target. All the best, Dave. * * *
wrc 01/18/02
 
If the CMOS4017 could be used to sequence a variety of different frequencies for a VLF unit. And is there a way to adjust the speed or timing of the sequence?
 
The CMOS 4017 or any other chip used as a sequencer could be used to sequence different VLF fequencies or for that matter, just about anything else. I am not sure that it would do much for you?
 
Don't have a copy of that one, that's why i was so iggnernt. That little oversight should be corrected shortly.
Thanks.
 
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