2ooser said:
CaDiggnDawg I like that idea I'm also going to do that. Being in Chicago and hunting a lot of old Chicago Parks I have to mess with the setting a lot to stop it from chattering. I'm not giving up I'll figure this detector out.
Having used and experimented with the twin F70 for over 3 years now if there is a setting combination you can think of I have probably tried it.
I can hunt with extreme noise and chatter if I want, got used to that long ago and these things will stop and tell you in some way when you are swinging over good targets no matter what, but hunting quietly is better for recognizing more targets and the only way some want to hunt.
I learned a few things over the years...
In urban environments there can be lots of EMI and chatter even in parks.
Doing a reset at sites like these might quiet it down a lot sometimes, it is like a reset helps acclimate them to sites with these issues.
Always, always, always do a reset if you encounter any strange behavior or after switching coils and it is imperative that you do this if you ever set a notch.
Reversing out of notches might look like you have gotten rid of it in the slashes up top but more often than not these things might be lying to you and you didn't...a quirk in the programming we Fisher guys have known about for a long time.
Changing frequencies in problem sites can also help, sometimes just one move to another frequency can do wonders.
Always GB if you do change frequencies and it works both ways but the engineers recommend always ground balancing in all metal then switch to disc after.
The lowest three tone settings will be the quietest...1 monotone, 1F and 2F, monotone the quietest of all.
I used to hunt using 4H most of the time and still do once in awhile when quick sweeping parks for coins and jewelry but nowadays if I am not in all metal monotone is what you will usually find me using...also it is fast, responsive and has some great unmasking abilities on everything from low to high disc...especially really low disc.
http://www.findmall.com/read.php?37,2372790
Not only can you use the gain and thresh to mitigate chatter, (and those lower tone choices), but the disc can help in that area too.
The
In very high disc you will get less chatter and you don't lose any depth on high disc using these detectors.
High thresh can get you deep if you can push it, here is a way I hunt sometimes doing that and by using high disc it is possible to do it quietly.
With thresh in the negative it is even quieter, other higher tone choices don't affect the chatter much and can still get very deep with the gain set high.
http://www.findmall.com/read.php?37,2346907
With disc at 65 and nickels notched in I have been able to just about max out the gain and thresh and still stay eerily quiet in some sites I hunt that never are on normal settings...I call this my Silver Shooting Settings method.
These things discriminate using slightly different programming at different settings, the effect is a little higher sensitivity and maybe a bit more chatter at more normal settings.
These things will be the quietest and the most stable with the disc setting from 5-20 but as I said if you push the disc very high it seems to calm them down again.
DP can sometimes be amazing in difficult sites but that is one tone choice you need to practice to deal with and understand it.
DP is actually the only tone choice directly tied to the numbers on the screen so the fastest of all of them in DE.
There is a lag time in all others but it is so short it is all but imperceptible at 78 milliseconds...but it is there.
http://www.findmall.com/read.php?37,2351519
A million ways to set up and use these things are possible and we all seem to do it different but with the same high success rate.
I am on # 2476 of that million possible settings and pretty much all have found me great treasure...but still some are better than others depending in sites and conditions.
If you really need to know the technical stuff about these things here are the specs from an F75 LTD but I believe all units on this platform are the same.
Operating Frequency: nominal 13 kHz, quartz crystal timing reference
13158Hz, 13100Hz, 1043Hz, 12987Hz, 12931Hz, 12876Hz, 12821Hz
Basic Sensitivity: 6 x 10 9 root Hertz (detectivity)
Lag Coefficient: 78 milliseconds
Reactive Overload: approximately 10,000 micro-cgs units (volume susceptibility)
40,000 micro-cgs units with sensitivity < 30.
Resistive Overload: approximately 1,200 micro-cgs units (volume susceptibility)
4,800 micro-cgs units with sensitivity < 30.
Ground Balancing Range: From ferrite to salt, inclusive
Discrimination
Ground Suppression: combination of second and third order methods
ID Ground Suppression: third order
Battery Life: Typically 40 hours with high quality alkaline batteries
Estimated 80 hours with nickel oxyhydroxide batteries
Estimated 65 hours with lithium iron disulfide batteries
Operating Temp Range: 4 to +122 degrees F (-20 to +50 degrees C)
Operating Humidity Range: 0-90% non-condensing