Interesting observation on tone break points

[foreign object]

I have thrre of the programs set up on my ctx in combined profile. 2 - FC and 1- HT and two in TTF one FC and one HT.
I set the ferrous break line at 24 on each one and the last conductive break point at 36 on the combined modes.
I have two dimes buried at 6" one has a rusted nail 2" off to the side and the other a pull tab the some distance. To get a constant high tone from both directions the conductive break point had to be set to the above 36.
Never really thinking about the ferrous line much i decided to move it down on one of the programs to 18. After doing so i could not get a good solid high tone at all frome the dime. The tone was a blend of somthing and choped. Not really resembling any thing that i had set up and not somthing that would stop me and make me want to investigate if i was looking only for a high tone.

I then started moving the fe line back up and not until i got to 22 did i get the solid high tone back.
I would have thought that the ferrous line would not affect the tone untill it was moved to maybe 15 or less. This happen with all 5 of the modes with different degress of disc.to wide open.
Am i missing somthing here?

Settings were as above with the following.
Tone= long
Sen. both manual and auto
Fast on

 

[foreign object]

Just dawned on me that a while back i was playing around with 4 tone ferrous and could not get a good clean tone on either of the two above targets or and of the clean targets that i have buried. Dont remember the break points exactly right now but am sure that i had the 2nd from top set somthing less than 18. Will try it again now and see what happens.

Is this somthing that is common knowledge with you guys that has used the ctx a while and a rookie like myself just learning?

 

[GKMan]

I have been here since the beginning and I do not remember this being discussed before. but, I may have missed it.I went outside to try to recreate what you saw but wasn't able to, could you post a video? oh I do have the 17 inch coil connected. Other than that I believe our settings were the same.without having your mlf file I can't be sure

perhaps you have stumbled upon something. sometimes that fresh set of eyes notices something the others don't

 

[foreign object]

Went out quickly and tried it again in one mode and the same thing. I can hear a short blip of a high tone (more of a false type tone but not sharp or clear) increased the fe line and again was not able to get a good clear high tone until i reached 23 with 24 and 25 much clearer and defined.


I am using the 6" coil.

GKMAN i would of thought that the 17" coil would do worse but i guess that asumption was wrong for sure.
Has me sort of rethinking the whole breakpoint/disc.usage thing.
Goal is to use use as little disc as possible and use tones as primary discrimnation while searching with ID,target trace and tone making the final decision to dig.
More testing for sure.

 

[INSAYN]

I set my tone line at 23 way back last year due to some chatter on this forum I think.
It certainly has been able to keep tones clean on deep targets.
I didn't spend a lot of time early on with the tone line at a lower number, so I can't really compare results.