Some F-75 options besides just cranking it up :cool:

[Mike Hillis]

Disc mode Sensitivity settings:

1. 0-29, This range is the same as the all metal sensitivity settings in the same range. I can only use this low of a setting if the disc mode is set between 6-19. Have not been able to use this range in the city when using 0 disc.

2. 30-50, This is the normal stable operating range usable by low disc setting (0-5) or higher disc settings (20+) or when using notches. When you raise it around 50 you are starting to go into high gain settings and it will probably chatter.

3. 0-82, This range is the normal operating range for disc settings between 6 -19.

4. 83-88, This is a high gain setting when using disc between 6-19. Much like turning a Tesoro into the orange Max Boost range, I find I can run as high as 85 sometimes.

5. 89+, Never had a detector go into this range before. I get what sounds like a threshold tone in this range when disc is between 6-19. Very sensitive. I can count on one hand the places I could actually use this high of a setting.

What I have discovered is that when I hunt with disc settings at 5 and lower, in DE mode, with the multi tones 3, 3h, 4, 4h, and dp, my audio is fuller but more modulated. The audio response is not chopped short on the edges and more modulated by depth. As I raise sensitivity up past 45 and get close to 50 I start to get into the chatter range and push the hard audio response back further away. By hard audio I'm referring to the hard response a shallow target makes. The higher the sensitivity is raised, the deeper the hard response is heard.

When I raise the discrimination setting up past 5, my audio response gets chopped short on the ends (activating a notch does causes the same thing) and now raising the sensitivity settings extends the distance so that what I call the hard audio response can be heard deeper. However the depth limits are apparently the same. Another words, 0 disc at sens @ 50 and disc at 10 and sens @ 80 are the same except for the tone response.

I get very good id with both numbers and tones with very stable operation and no apparent depth loss in the city running the #2 settings above.

I've been working in the stable zones for the most part as my ground type & mineralization don't support the higher settings but every now and then I find a site that will let me boost it a bit higher.

Next time you get out in a city park, put it in DE, choose your favorite multi-tone audio, drop your disc to 0 and sens to around 35-40 and let me know what you think about it.

HH

Mike

 

[Mark in NC]

n/t

 

[jbow]

Let me ask you... do you notice a lessening of the chatter in JE or with the disc lower than 5 if you also lower the sens to 30-40 or does it just chatter quieter? Mine seem's, in some settings, to just chatter quieter as I lower the sens, rather than less.

I noticed yesterday that it seem's more stable with the disc high, (like you were talking about forcoinshooting, disc maxed and nickels notched in), if I run it in JE mode. It chatters more in the air on this setting but as I lower the coil and begin to swing over the ground it seem's to stabalize more in JE than in DE or PF modes.

Still, sometimes I notice that lowering the sens just make's it chatter with less volume...

J

 

[Mike Hillis]

JBow,

Yeah, they complicated this one. You can't just do a normal disc or notch setup like any other machine and take off and expect it to be quiet.

I only use JE like you've already described, maxed out disc with various notch settings, 2+ tone with sens up between 30 - 50 depending on how it wants to act at the site. I don't particularly like to hunt through the chatter if I have a choice so I'll seek out the more stable settings. I don't know what else to tell you other than to keep fooling with it and learn the quiet spots for when it gets noisy. Mine seems site specific noisy more than anything.

Mike

 

[jbow]

Same here, so I guess I have a good machine. I really have no problem with the chatter as long as it's not overwhelming like EI chatter.

I look at it like this: I wear bi-focals. Several years ago "progressive lenses" came out. The doctor said i could try them but that some people could not adjust to them. I had people tell me that they were awful, etc.
I decided two things. I decided to try them and I decided that I was going to not complain. I accepted that they told me I would get used to them if I stayed with it and that they were, in fact, better... but that at first I would notice a difference and would have to adjust.
I told myself that I was going to do it and I did. Yes, I noticed a difference but I had already adjusted my attitude and did not let it become a problem, that would have become a bigger problem if I had taken the attitude, "I hate these things, they are not like my old glasses, they are too different".
Of course, it took no time and now I would never go back.
It is the same with the F75/T2, I think, (excepting the bad units). FWIW, I had a bad T2 at first but I used it for two weeks and still found good stuff. It was not bad faulty but the connection was loose at the cable to box. Eventually I had to send it back for a new coil, rebraided wiring and resolder, but my attitude was right and I hunted with it and loved it. I still have the T2 as a back-up but the F75 is the best, by far, detector I have ever used.
I will say this, if you are reading this and you are used to a quiet machine and you are thinking of getting an F75 to see if you like it, if you can't stand some chips, chirps, and noise, if you alway's turn your machie down to where it is completely stable before you are happy with it, if you can't tell yourself you are not williing but happy to adjust to a noisy machine... don't bother with either an F75 or a T2. However, if you can get your mind right and know you're buying a HOT machine that will make a bit of noise and that you are going to be excitted to use it and learn it... then BUY one and never look back, you'll not be sorry.
Let me say this too, when I refer to chatter and noise, there are two kinds of chatter and noise from the F75. One is when something is wrong, like invisible dog fencing or dirty electricity in a low line, or a loose coil wire. In those scenarios it is near impossible to hunt because the chatter will be constant and also it will be as loud as the hits you will get when hunting. The other chatter, that is just part of the F75 is falsing, small bits of targer and other unknown background popping and clicking. This type of chatter and noise, while disconcerting at first, is not as loud or as distinct and a true hit on a target. The only time it become's a problem for me is if I am running in any tone mode besides 1 or 2+. I have found it easier to use the disc and notch and then use one tone when, for instance, looking for coins. It is a complex, lightweight, monster of a machine but if you are leery and don't think you'll like it if it is not smooth running and quiet, don't waster your money.

I would not trade mine for anything. Yes, I am alway's looking to try this or that detector but that's just the way I am, especially when I don't have a new good site to hunt... laff.

Thanks,

Julien

 

[digitrich]

awesome post mike, I'm going to try this and see if it lengthens my audio signals, as that's the problem I'm sending mine in to have checked...squelched, choppy, very to short tones. But another question is how do you get the machine out of notch one? Is there such thing as no notch or is notch one really notch zero???? Sorry about the newbie question.

 

[Mike Hillis]

1 is the lowest setting. The setting of 1 is not susposed to activate any notching. When I finish setting my notches, I return it to 1 and click the trigger. I also treat the Factory Reset ability as a feature and use it as a fast way to remove notch settings, or anytime I want to start over.

Always click the trigger to return to the hunting mode and wait for it to engage before cycling through the menu with the button or you may often inadvertantly change settings.

HH

Mike