F 75 series detectors ............

[Elton]

When you are using the F75 detector do you make certain the wire near the coil is wrapped tightly ??

Rereading the manual I noticed it is Listed as [size=large]"Critical"[/size] to stable operation and must be tight to the rod.

I was experiencing some slight jumpy Id's along with chirpy sounds. When I re-wrapped the wire securing it tighter..Waaaaaaaaaaalaaaaaaaaaaa all chirpy little sounds went away..


So check your coil wire wrap near the coil.. This might fix some issues for you too.

 

[psyvad]

Thanks for the tip - I'll have to give it a try. Guess it pays to read the manual.

 

[TerraDigger]

Elton, on my machines, I run the coil wire straight up for 5"........then start wrapping it around the shaft. The straight portion is taught, but not straining the connector.
Why do I do it this way? I believe in having as little coil wire mass (its metal after all) near the coil as possible. Less interference to the electromagnetic field....little better performance..theoretically...as I have no way to prove it.

 

[jim tn]

I run my coil wire up the shaft the same as Terra. Don't know if it helps for sure either, but I have no chatter unless I run into a true emi issue from some outside source. HH jim tn

 

[Coilfisher]

I don't keep mine wrapped tight at all.
In fact Ieave slack at the lower shaft and upper shaft about 8 inches before each end point.

I never had any trouble.

 

[mudpuppy]

n/t

 

[Elton]

Cause then he can step North, or South, of the equator line and not have any chirping ...........

 

[Elton]

n/t

 

[Elton]

I swing a little faster than most people..so maybe I was causing the wire to move ...

 

[Elton]

n/t

 

[TerraDigger]

Not to sound like a know-it-all...but if there was chirping....I am thinking possible wiring/connection issue with coil. Have you jiggled the wire by the coil connector to verify this possibility?

 

[Elton]

I always had my wire kinda looped out down near the coil. In fact I had it so far out I could swing the coil up till the top of the coil touched the rod..Or swing it down as far as it could go.
This allowed for a pretty large area of wire to be hanging when secured with the Velcro strap to the rod. I did this so when I was detecting in brush and woods area, if I hit something hard the loop was able to move freely..Not bind up and rip the wire from the coil connection on top of the coil. ( I had that Happen) once. Now I swing fast so the overlapping wire was swinging back and forth about an Inch as I would move the rod left to right........... This was in turn being picked up by the coil..Causing what I termed as a chirps.. Small short beeps may have been a better term..

So yes wire is secured and no lose wires..Now after reading the manual I see where Fisher said to have a tight wrapped wire near the coil.In fact Fisher said it is critical with the 75 as it is very sensitive....

Doing as they suggested did help quiet my machine down on swings back and forth.. I'm not saying it will fix all false beep issues...I am saying by doing as they say, it will stop some false beep issues as your moving over the area being detected.

It also has nothing to do with detected items you hit in the ground... It only stops the coil from detecting the wire as it was swaying back and forth over the coil...

 

[TerraDigger]

Kill my theory

 

[pasttom]

Just watch and listen- if you get flapping and chirping go for the Velcro and or electric tape and pin the wings a bit. If it ain't broke...
Tom

 

[grumpy]

COIL WIRE ; I not being of sound mind or body or an expert by any means have learned a couple of helpful ( I Think) ideas on this issue; First take the wire up from the coil about 6 or so inches and wrap it with a velcro mirical strap thingy to keep it from floping but not tight enough to strain; wrap the rest up toward the box and at the box attach the cord with some slack not tight or it will cause fatique and brake the cable from the mic connector on the coil side. Also had brain box connector get loose and short evidently from this being to tight ( or possible changing coils to often?) but to tight i have experienced and had a friend also experinece that one. Hope this helps on down time for some.

Grumpy