It just HAS to be a result of the frequency sets John
I was going to say, frequency selection, recovery speed, separation, etc, are all playing a part here.
Other than coil size, it's all about frequencies, recovery speed, and iron bias.
Frequencies:
BBS and FBS detectors main advantage is much better ID at depth. The main disadvantage is a
very slow recovery speed. A slow recovery speed is going to miss a lot of coins in trashy sites, and slowing your swing speed to a crawl is not adequate enough to compare to the very fast recovery speed of detectors such as the Nox, Legend, and D2. So right off the bat, a D2, Legend, or Nox, will unmask coins better than a BBS or FBS detector.
In nonferrous trash, the key is to use frequencies in the 3 khz to 7 khz range. If you go higher than that, then a lot of coins in nonferrous trash will ID in the mid to large size foil range. Conversely, when using below around 7khz, those very same coins will ID very close to their true ID.
For coin shooting, most Nox owners will use Park 1, and Legend owners will use Park M1.
Neither of these frequencies are low enough to get the best coin unmasking in nonferrous trash. The Legend’s Beach Mode MW is 4 khz and 10 khz, but weighted more toward 4 khz. That mode will give much better unmasking than the Legend’s M1, or the Nox’s Park 1. Nokta is going to modify Park mode’s M3 to be weighted the same as Beach Mode’s MW. I suspect that the Nox has a Beach Wet mode, that is weighted very low (lower than its Park 1, and similar to the Legend’s MW mode). If the Nox has such a SMF mode, that's the mode I would use for coin unmasking, not Park 1.
Recovery speed:
Provided that the detector isn’t trying to transmit and process an excessive amount of frequencies (like BBS and FBS), then modern flagship SMF detectors are capable of processing at the same fast rate. The Nox 800, Legend, and D2, can all achieve about the same recovery speed. The Nox 600 however, isn’t capable of the same processing speed as the Nox 800. Also, manufacturers can only go so fast on the recovery speed, otherwise negative effects such as audio clipping will begin to happen.
Iron Bias:
A manual iron bias control is a “must have” for SMF detectors trying to unmask coins in ferrous trash. If your SMF detector doesn’t have a manual IB control, or it has an IB control that you haven’t lowered, then you will miss coins in ferrous trash. For reasons yet unknown to me, iron bias isn't as important with single frequency detectors, compared to SMF detectors.
Conclusion:
If you use the correct frequencies on the Nox 800 and Legend (not Park 1 or M1), as well as using a medium/high recovery speed, and a low iron bias, then the Nox and Legend will unmask and separate coins about the same as the D2.
But yeah, it’s certainly capable of weeding out high conductors at a rate I haven’t seen before. Another factor going on with it is that it’s so light that you can easily have good coil control all of the time, which is such a paramount thing that people can overlook at times. It counts, a lot. Thanks!
