northwest Null and noisy ground
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australian electronic gold prospecting forum.com  |  QED users  |  QED users (Moderator: bugwhiskers)  |  Topic: Null and noisy ground 0 Members and 1 Guest are viewing this topic. « previous next »
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Author Topic: Null and noisy ground  (Read 69 times)
Prickly Prospector
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« on: Friday October 15 2021 05:37:14 AEDT AM » Reply with quote

While not the preferred method, I have been getting good results on variable (hottish) ground with a small coil, by running  as far under null as possible (quiet machine) and THS A at 1 with full gain.

In worked areas and mullock heaps, I find it eliminates all but the most severe ground noise, and has picked up targets as small as 0.03g (12x8 Evo). That said, it will still sound on bullets and cartridges at 12 inches no problem. lol.
The only negative is the cut-off point, in that the coil will only sound for genuine targets or extremely hot patches (hot rocks), anything on the fringe is virtually silent, (so swing overlap has to be tight), though with time can be heard in the background buzz. This means deeper targets would require a coil change. Please note, I do not use these settings on open ground or patch hunting, only when hunting smalls on shallow workings and gullies.

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australian electronic gold prospecting forum.com  |  QED users  |  QED users (Moderator: bugwhiskers)  |  Topic: Null and noisy ground « previous next »
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