NOTCH & The F75 "Simplified"

[Elton]

F-75 Notch

Range............ #1 to # 65

Important..............ALL notch range settings have a set of fixed numbers. This is critical you understand the range for Low side and high side of targets.

1 to 7 is low side of iron ( 7 fixed settings)
8 to 15 is High side of iron ( 7 fixed settings)
16 to 20 Low side of foil ( 5 fixed settings)
21 to 25 High side of foil ( 5 fixed settings)
26 to 30 Low side of nickles (5 fixed settings)
31 to 35 High side of nickles (5 fixed settings)
36 to 45 low side of tabs (10 fixed settings)
46 to 55 High side of tabs (10 fixed settings)
56 to 60 Low side of zinc pennies (5 fixed settings)
61 to 65 High side of zinc pennies( 5 fixed settings)

If you choose to set notch on any number above 1 through 65, [size=medium]Low,[/size] or [size=medium]High[/size] side of notch fixed settings ( does not matter which you use) only the fixed setting range for the set of numbers fixed by the factory will be affected. 1/2 of the value for the target range will be effected.Either the high or the low side.

[size=medium]Example: your running Discrimination at 50[/size].............you decide you want to maybe find some small gold rings. Go to notch and press menu. Turn knob to the number 16, 17, 18, 19, or 20.. press menu. You just notched in the low side of foil.. Fixed by the factory # 16-17-18-19-and 20....( See above range) You just changed all 5 numbers to accept by using notch You will now get beeps on the lower half of foil targets... Notch is always just the opposite of Discrimination. You will now see a small dash on the top target range foil up above on display.To take the foil out again go to notch, press menu, turn knob to 16 and push menu. Notch is now gone. dash is removed from foil above.

[size=medium]Lower setting discrimination 23 example[/size]

Now say your discrimination is set at 23..you want to set notch at high foil side..go to notch, press menu, turn knob..set numbers to 21 with knob..Press menu.
You just notched in 21 22 23. [size=medium]24 and 25 is notched out[/size]. Why you ask..Simple notch is always just the opposite of discrimination..Your discrimination was set at 23... so 21 , 22, 23, was notched in......[size=medium]24, 25, was notched out[/size]. Remember the fixed set of notch numbers are always used..these were set by the factory...so all the fixed numbers were used.

It's really a nice system. It allows you to get rid of pesky pull tabs but still get some good targets too.


Remember the range numbers are set at fixed numbers in notch if you are running Discrimination in the middle of the notch fixed numbers, high numbers will be opposite of the low numbers at or under your discrimination setting.... The above works in any notch setting you choose..It's the fixed numbers only that are affected by notch.

 

[Paul (IL)]

Good Post Elton, this sure makes notching look simple enough.

 

[Charles (Sabre)(Tx)]

Very well explained. But...in the case where you only notched out part of the lower band( 21-22-23) and left in 24-25,...how does the dash appear? Will it still be there or will it only be partly there? In other words...is there any indication which would tell me that I had only notched out part of that lower range?

Thanks and good job BTW.
Charles

 

[jimmyk]

I believe you only get one dash. If both upper and lower are notched, I think you get two dashes, side by side. Correc tme if I'm wrong. I do mostly relic hunting with my F 75 and don't utilize the notch feature.

keep on diggin'

jimmyk in Misssouri

 

[Elton]

I think notch will only have a dash on the lower side of foil above... But I will verify that for sure.

 

[Elton]

n/t

 

[Elton]

In other words if your detecting in a park.. your using Discrimination at 25. all of a sudden your getting a lot of one type of pull tabs. Say it falls in the
#38 Target ID.. Over and over again..You go to notch..press menu dial to the number 38..and press menu. A dash will darken up above on the left side of the tab name on display. You removed the Number 38...but you also removed 36, 37,39,40,41,42,43,44,45.....Because the notch is set up in a fixed set of numbers on each target catagory..36 through 45 is the lower half of factory set notch numbers in tabs area... You will always remove all factory set numbers when notching out target numbers that is above your discrimination setting...You will always be putting the numbers in with notch if they are lower than your discrimination setting. [size=large]You need to know these notch fixed numbers to understand the notch system[/size].

Now if your running Discrimination at 40..then the notch system is designed to do just the opposite of Discrimination..So 36 37 38 39 40 will be notched in..
41 42 43 44 45 will be notched out. Notch always does the opposite of the Discrimination. So if you want all the fixed numbers in tabs on lower half out..Move your discrimination to 36 (Get your discrimination number at the lowest fixed number) in the range you want to remove. Before, you set the notch.. It's your choice..but you have to work the two systems together for full benefits.

 

[Elton]

n/t

 

[Elton]

Dsshes are not side to side on the word.They are at an angle slanting down upper left to lower right split in the middle for lower and and higher side Lower is on top and Higher is on bottom of target word. ( \ )

 

[jim tn]

n/t

 

[Elton]

n/t