This refers to the F-70
Bill & Tom,
Yes, all of the above applies to the F-70 also. Keep in mind..... the F-70 (overall) has nearly identical performance to the F-75... but MUST have the same coil as the F-75 (yes, can be interchanged). With the 9.75" elliptical coil on the F-70.... on average,,,, there is approx a 1.5" loss in depth capabilities on coin-sized targets. This can be circumvented by installing the elliptical DD 7 x 11 (F-75) coil on to the F-70. As far as F-70 threshold..... I have noticed minimal/negligible variation differential with performance operating characteristics...... having changed entire spectrum availability on the F-70..... with Florida dirt conditions. On the F-5, slight changes in threshold... presents dramatic performance changes. On the Coin $trike..... the Threshold function is akin to the F-5.... dramatic. There was to be (some form) of linearity with Thresh adjustments.....but varying dirt (and other variables) will alter this to some extent. Yes, I fully agree that a mid-depth coin-sized target should NEVER disappear..... no matter what Thresh value is dialed-in. The C$'s intended target was to tackle black magnetic dirt. It performed such..... (almost) regardless of coil-sweep speed,,,,,, and would trump a multifreq CZ. Dimitar performed such matters with the utilization of a single freq 7.1Khz platform. Commendable..... all things considered (details refrained). He was hired by FRL.... given a clean slate..... and deliberately NOT given ANY blueprints to currently-in-production designs...... so as to circumvent "preprogramming" of already-existing mindset. Considering the utilization of electromagnetics in electromagnetic dirt (yep, self-defeating)... he accomplished a mission of partial paradox.
Tone break following/tracking Disc setting is nothing new.... but can be a tremendous aid. I believe the Cobra II (and others) employed such function.
It is only now....... with the utilization of F-75/T-2....... are we BEGINNING to learn how critical (and how crippling) iron masking truly is. Pandora's box has been opened....... no one wanted to face (tackle) the music..... ((( many never even knew it even existed; hence, could not combat a 'unknown' problem ))) and MOST designers choose to NEVER open this box. Bruce Candy has performed masterfully with this problem..... but in a tangential expenditure by virtue of HIS type of (magnetic/iron) dirt.... with the inception of FBS incorporated into the Explorer. It's just that..... even with the recently released Explorer E-Track...... the unit will "null" TOO TOO much in nail-laiden soils. This portion.... I simply can not accept. . . . YET.... I highly praise the Explorer's 'bad dirt' handling capabilities.... (a product of Australia dirt). IN THE MEANTIME..... Dave & John made the maiden 1st tackle. Single freq (which handles iron better), correct selection of freq, extremely tight EM footprint elliptical DD coil, large-scale iron Disc adjust, extremely rapid processing clock-speed microprocessor (matching....or exceeding/beyond human brain processing speed,,,,...... sometimes frustrating the fallible 'human' element)..... and a host of other attributes. It certainly has revolutionized the way we think/hunt...... and "opens the mind" to future exploration & possibilities. How do you commend?
Tom
