Disc to mode testing on the F75Ltd.

[MarkCZ]

Mark you missed my main point. Doing comparative depth testing in air isn't going to provide accurate results. The original poster did airtests of different F75 modes and offers them up as an comparison of the relative merits of each mode. My point is that airtesting say plowed field mode in air on a coin isn't valid. My experience is in a freshly plowed corn field you will have better results than using de mode for instance, an airtest won't be able to duplicate those results.

I agree, but what Ron is showing has nothing to with depth, what he was trying to show is how the different modes are affected differently when changing 'Only' the discrimination control. In his illustration he charted using a number system just how the electronics are responding. In his chart and in his number system and forget its in inches, just call it "score". what the score is showing us is the discrimination control does things a little different in different modes,
So, now that Ron's score system charts those differences its more knowledge to the user to maybe dial up something better for use in any field condition.

Its a score chart, not a difference in depth chart.
Nor is it a Depth comparison for the different modes.

At home he worked with what he had!
He was using inches out from the coil and the differences without changing the sensitivity, but only changing the discrimination control distance from the coil increased in some modes even though the discrimination was Increased! but not in all modes! Some modes changing the discrimination had No affect at ALL!
His chart just used numbers as slide rule so a person can see it!

For some reason we're stuck on the title thread being a depth comparison! he wasn't even working on depth, depth wasn't the project, the project consisted of providing a visual chart for us to see what the discrimination control does to the sensitivity in EACH mode,
A loss,
A gain,
No Change,
In ALL Modes!

Mark

 

[WV62]

We have just about beat this one to death, Mark has explained what I was try to offer up and he is right on,on all points. Now we can keep going back to depth but the only thing I have to work with is the controls on the detector and the only way I have to see if changing a control does anything is to put a target in front of the coil and measure the distance from the coil to the target.
If the target measures a different distance from the coil after changing a control setting I assumed that change in the control setting was the cause, if the measured distance did change I also assumed that changing the control setting had no effect on the detector in that particular mode of operation.


Now I have a question, can anybody explain why I shouldn't hunt in CL mode for coins? I know what it was designed to be used for but it is really hot on single quarter and even a single dime with all the coils I have.

Ron in WV

 

[Elton]

It is an enhanced sensitivity, slow speed version of De mode Ron. It works best sweeping slow and a little off the ground. The motion all metal mode characteristics are modified too....and after setting up in CL you may benefit even more switching to all metal. Less noise and slower sweep speeds would be good for coin hunting with superior possibilities of added depth..

Let us know how this works when you get out.

 

[WV62]

Wasn't going to post this, but then I thought what to heck, somebody may get some good out of it.

Ron in WV

 

[MarkCZ]

While in ground results will vary, the electronics and those settings look good with that little NEL coil!

Mark

 

[WhatTheBeep]

Very interesting results, Ron, and even though I swing an F70 it's fascinating to see what the different settings do on the F75LTD (and who knows, I might eventually upgrade to the F75LTD). That little NEL coil does look interesting!

And yes, there are still some of us air testers left! But I have so much EMI at my home from the power lines on 3 sides of my property (I've even turned off the main breaker with no luck) that I can't test to the extent I would like.