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More 4 kHz observations....

CZconnoisseur

Active member
So it's raining cats and dogs here and I'm off for the next 3 days - now I can devote some time to detector settings!

Last night I wanted to see the difference, if any, between frequencies vs max detection depth. During this test I kept everything constant except operating frequency and the settings were:

Reactivity = 2
Silencer = 0
Sensitivity = 90
TX = 3
Disc = 2.0
Iron Vol = 0
GB = 83
Ground notch 84-90
Notch 00-30 and 97-99
Audio response = 3
overload = 2

Kept TX = 3 since you can't change TX power in 4 kHz. There was the usual slight change in detection depth as you went up in frequencies, however the most interesting observation was that faint targets in 4 kHz were much clearer than the background chatter as you moved the coin away from the coil.
I had a 90% silver quarter to test...At 8" depth @ 4 kHz it was clear and unmistakeable, but a quick change to 12 kHz and while at the same depth, the signal wasn't NEARLY as "diggable" compared to the 4 kHz setting. I noticed the same behavior with the silver half and silver dime, and the indian cent exhibited the same behavior only to a lesser extent. The US nickel sounded the same at fringe depth across the board, however.

I then upped reactivity to 3 and kept everything else the same and repeated the test in the same exact manner. Max depth decreased about 1-3" depending on the coin, and 4 kHz again was the clear winner on the high conductors, most notably the silver quarter and silver half.

So it looks like for now I have a new program to use for deep coin hunting. Around this neighborhood and the rental houses separation and resolution speed are the most important attributes while at a place like the fairgrounds I would prefer more iron rejection and depth, while having decent separation. We are moving out of here in the next month or two, so I need to hoover all the easy silver I can before we leave!
 
Do you have a video camera? Would love to see some of these experiments in order to hear the sound difference you're talking about. To be clear: I believe you and am not questioning the outcome; I just want to hear what you're talking about! :)
Thx
Rich
 
I have found that keeping the Reactivity at 2 and Silencer at 0 gives the best "dig me" indication at depth when using 4 kHz
 
DukeOBass said:
I have found that keeping the Reactivity at 2 and Silencer at 0 gives the best "dig me" indication at depth when using 4 kHz

Thanks for the info. Have you found any other combinations for the other freq's?
 
I have been using the Reactivity 2 / Silencer 0 in 4, 8 & 12. I haven't done any hunting in 18.
 
samandnoah said:
Do you have a video camera? Would love to see some of these experiments in order to hear the sound difference you're talking about. To be clear: I believe you and am not questioning the outcome; I just want to hear what you're talking about! :)
Thx
Rich

Am working on it without having to purchase a camera...I agree a video of this would be better!
 
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