I did get out a little yesterday and did some initial comparisons with all three available coils.
The first thing I noticed when I removed my new 3 kHz from the box was that it felt slightly heavier. I anticipated that due to the difference required in the windings. Since I had to make a stop at the US Post Office, I carted all three coils in for them to weigh for me. I left the coils covers on all thee coils, and we made sure the coil cable was resting on top of the coil.
The 'STANDARD' 9" 'M' 7.5 kHz coil weighs 15.6 oz.
The 9" 'H' 18.75 kHz coil weighs 15.1 oz.
The new 9" 'L' 3 kHz coil weighs 18.2 oz.
So, the 'H' frequency coil is 0.5 oz or 3.2% lighter than the standard 'M' frequency coil. The new 'L' frequency coil is 2.6 oz. or almost 16.7% heavier than the standard 'M' frequency coil.
Some might not notice a difference in balance or 'feel', but with my bad back and shoulders I do. The main differences we're going to see, or look for, with all these coils is actual "in-the-field" performance. Air-testing in my den with my computer nearby I noted that the 3 kHz coil was a little noisier than the stcok 7.5 kHz coil. I also noted that it wasn't nearly as responsive (depth) to the lower-conductive targets, which was anticipated.
I didn't see anything remarkable in a performance 'edge' on the mid-range conductors, and just a little on the higher-conductive silver coins ... BUT ... as I stated, this was a quick initial "air test" in a noisy environment. I visited two sites yesterday that were some of the more highly mineralized places around here and the 'L' freq. 3 kHz coil seemed to handle them well. Today I will be in-the-field in some fairly nasty ground to compare the performance of the 'L' and 'M' coils on naturally found targets.
The lower frequency coil should, in theory, handle 'bad ground' better and show it in results. I am still anxious to get a smaller coil in 7.5 kHz, and to see what the elliptical DD coil will bring to the game.
I hope others will have the opportunity to get out and play, or at least some decent weather to entice them to do so!
Monte
The first thing I noticed when I removed my new 3 kHz from the box was that it felt slightly heavier. I anticipated that due to the difference required in the windings. Since I had to make a stop at the US Post Office, I carted all three coils in for them to weigh for me. I left the coils covers on all thee coils, and we made sure the coil cable was resting on top of the coil.
The 'STANDARD' 9" 'M' 7.5 kHz coil weighs 15.6 oz.
The 9" 'H' 18.75 kHz coil weighs 15.1 oz.
The new 9" 'L' 3 kHz coil weighs 18.2 oz.
So, the 'H' frequency coil is 0.5 oz or 3.2% lighter than the standard 'M' frequency coil. The new 'L' frequency coil is 2.6 oz. or almost 16.7% heavier than the standard 'M' frequency coil.
Some might not notice a difference in balance or 'feel', but with my bad back and shoulders I do. The main differences we're going to see, or look for, with all these coils is actual "in-the-field" performance. Air-testing in my den with my computer nearby I noted that the 3 kHz coil was a little noisier than the stcok 7.5 kHz coil. I also noted that it wasn't nearly as responsive (depth) to the lower-conductive targets, which was anticipated.
I didn't see anything remarkable in a performance 'edge' on the mid-range conductors, and just a little on the higher-conductive silver coins ... BUT ... as I stated, this was a quick initial "air test" in a noisy environment. I visited two sites yesterday that were some of the more highly mineralized places around here and the 'L' freq. 3 kHz coil seemed to handle them well. Today I will be in-the-field in some fairly nasty ground to compare the performance of the 'L' and 'M' coils on naturally found targets.
The lower frequency coil should, in theory, handle 'bad ground' better and show it in results. I am still anxious to get a smaller coil in 7.5 kHz, and to see what the elliptical DD coil will bring to the game.
I hope others will have the opportunity to get out and play, or at least some decent weather to entice them to do so!
Monte