f5 nickels and gold

[longbone]

I found my first gold ring with my new f5 by accident .I was at a fresh water beach digging all signals got a crazy signal that jumped from 25 to 80 and was sure it was trash.Couldn't believe it was a good size 14 kt ring . I scanned the hole in all metal nothing else there. Buried the ring again at 4 inches got the same trash signal. Played with gain and threshold no change. Came home and checked two more gold rings in my yard .Detector would not give a solid tid jumping between 18 and 80 depending on size of ring.Bigger ring bigger spread. Tried a nickel buried 2 inches showed as a zinc penny,deeper nickels bounce from 26 to 60. All detectors I have had gave a good solid hit on gold rings .Any input from f5 users apreciated .Is this normal?

 

[Big Boys Hobbies]

Did you properly ground balance it before you tried them? Was your discrimination possible set to high??

 

[longbone]

Yes I ground balance and discrimate out only iron with a setting of 16. I tried everything , changing to 11 inch double d coil same result. Tried changing gain and theshold using all settings. Gain acts like a volume control and threshold has little or no effect.This is supposed to be a demo unit .Hope it was'nt a return. Think I'll call Fisher tomorrow.
Coins stay in high tones but only quarters lock in.

 

[Mike Hillis]

Longbone, it doens't sound normal to me. Especially at both the beach and your yard. I could see maybe one place having real high mineralization and causing you some TID grief, but not at two different places. I suspect something is out of wack and it needs a trip to the hospital.

Good luck
Mike

 

[BH_Landstar_]

I'm with Mike on this one, send the unit back for repair, sound a bit wacked / out of sorts.

 

[BrewCity]

That is not right at all, I've never had a nickel bounce more than a couple of numbers.

 

[longbone]

Called FT this morning ,got a repair authorization this afternoon and barely made it to the PO in time. We are expecting rain, sleet then 9 to 15 inches of snow tomorrow with 30 to 40 mph winds predicted. Hope the F5 makes it back before the snow melts. Will let you all know how it turns out.

 

[crusher28]

DOSE YOUR f5 HAVE A PUSH IN PLUG WIRE OR A SCREW IN?? MINE HAD THE PUSH IN COIL WIRE AND DID THE SAME. SENT IT BACK TO FISHER AND THE REPLACED THE COIL WITH THE BETTER TYPE COIL W/TH THE SCREW IN
COIL WIRE AND MODIFIED THE CONTROL BOX . NEVER HAD THE PROBLEM AGAIN. THE PUSH IN PLUG COIL WIRE IS NOT TIGHT ENOUGH AND WILL GIVE OFF FALSE SIGNALS. FISHER USER FOR OVER 34 YEARS

 

[longbone]

Screw on connectors. Forgot to mention that pinpoint would sometimes fade away before I could pinpoint a target. had to release and let screen go back to d and hit pinpoint again.I'm confident that FT will correct these problems. I got the feeling that they have had this complaint before. Since we're snowed in for a few days here think i'll work on a little display frame for finds,and make some new screen covers. Thanks everyone, for your input.