JohnnyRox Posted March 27, 2020 Share Posted March 27, 2020 Don't know if this has been posted before but worth watching. Gets good at the 3:30 mark. 5 Link to comment Share on other sites More sharing options...
JohnnyRox Posted March 28, 2020 Author Share Posted March 28, 2020 Hey Steve, I think I remember seeing you post a conductor vs frequency chart. Would you be able to post it again please? Link to comment Share on other sites More sharing options...
Steve Herschbach Posted March 28, 2020 Share Posted March 28, 2020 hmmmm, not sure about a chart but there was this..... 1 Link to comment Share on other sites More sharing options...
JohnnyRox Posted March 28, 2020 Author Share Posted March 28, 2020 3 hours ago, Steve Herschbach said: hmmmm, not sure about a chart but there was this..... Thanks Steve for the link. I remember seeing a chart somewhere, I figured you posted it cause you're like a depository of MD knowledge. Link to comment Share on other sites More sharing options...
lookfinders Posted April 2, 2020 Share Posted April 2, 2020 seems like 5 is the way to go. I don't detect parks.only old colonial sites in upstate ny.after not finding anything for 2 years at my house that was built in the late 1700s.i pulled out 2 colonial buttons .mind you they were both under old rusty nails, not modern nails.i don't know if the detector ,which is the nox 600 at 5,was targeting the nails and I just so happened to find buttons underneath or if the detector actually found the buttons.i have gotten signals the same and they only produced colonial rusty objects,mostly nails. Link to comment Share on other sites More sharing options...
GB_Amateur Posted April 2, 2020 Share Posted April 2, 2020 I decided to repeat this test, more/less. Here are my settings: Park 2, gain = 18, Noise Cancel = -4, Ground Balance = 0, Recovery Speed = 3, FE = 1. Big difference #1(?): I used the 11 inch coil instead of the 6 inch coil. Big difference #2(?): In my variable depth test-stand I put the targets (silver dime inside ring-only pulltab) at a depth of 6 inches in the ground. Big difference #3: rather than notch discriminating, I went full spectrum (Horseshoe button engaged to read all 50 output channels from -9 to +40). Similar to the video, I only used 5 audio tone setting but that shouldn't matter since I'm reading TID's that show on the display. I made sure to swing the coil with moderate amplitude -- basically edge to edge of the 11 inch coil (so a swing amplitude of 11 inches). Here are my TID results as a function of detector operating frequency: multi 15/14 5 kHz 23 10 kHz 20 15 kHz 18 20 kHz 18/17 40 kHz 17 multi (repeat) 15/14 Note: when I show two numeric TID's separated by a slash, the first is the predominate TID but the second occurs almost as often. As you can see, I never saw 26/27 which is what an unmasked silver dime shows. I didn't even see 25+/- which the video shows for the 5 kHz setting. Basically I confirmed the video's test qualitatively, but I added quantitative detail which is more revealing. Now, the big question is: how much does this test impact actual field conditions? When will you ever find a silver dime inside a ring-only pulltab? I prefer searching for real (undug) targets and varying the operating frequency before digging, noting differences in detector response (tone quality and TID). 3 Link to comment Share on other sites More sharing options...
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