How does signal change as a function of sensitivity?

[go-rebels]

I'm going to add a deep (8") silver dime to my test bed and measure the output of the F-75 based on different sensitivities in different modes. I'm wondering if the target can be seen at much lower sensitivities than my usual "hot" setting.

Has anyone ever done a test like this?

 

[ziphius]

I've done this test on deep coins in the ground before I dug them. This was in a turf park. My default sensitivity is 85 when I hunt parks. I lowered the sensitivity in increments to see how low I could go before reaching a place where I would be likely to miss the target. Sensitivity of 70 is still great on these deep targets and you have the added benefit of less chatter. 65 is fine, but the signal is notably fainter. At about sens = 60 you really lose the ability to hear these deepies. Of course, everyone's hearing is different, so results will vary. The coins were between 7 and 9 inches, either wheat cents, silver dimes, or silver quarters. It's fun (and informative) to try on your own deep targets in the field. - Jim