Fisher F2 signals with no coil / false signals
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  1. #1

    Nov 2013
    Milton, Fl
    Fisher f2
    All Types Of Treasure Hunting

    Fisher F2 signals with no coil / false signals

    I am new to this. I picked up a used fisher f2 about a year ago. It worked well for a while now it seems to get alot of false signals everywhere I go. I was seeing if it was my coil. I disconnected it to check and it still would go off when it wasn't connected. If I take my hand and tap near the connection where the coil connects in it will signal as fast as I can tap it. Should it signal with no coil? Not being familiar with it I am wondering is this normal. Any advice would be greatly appreciated.

  2. #2
    "Is that a Geiger Counter?"

    Feb 2006
    South Central Upstate NY in the foothills of the headlands
    Minelab Musketeer Advantage Pro w/8" & 10" DD coils/Fisher F75se(Upgraded to LTD2) w/11" DD, 6.5" concentric & 9.5" NEL Sharpshooter DD coils/Sunray FX-1 Probe & F-Point/Black Widows/Rattler headphone
    14120 times
    Metal Detecting
    One thing you NEVER want to do is run a transmitter without an antenna attached. I assume metal detectors may be the same - but hopefully low enough power that you didn't fry anything.

    But it does sound like you have an intermittant short somewhere if poking it gives you a signal.
    Political correctness is facism pretending to be manners -- George Carlin

  3. #3
    LRL fraud debunked

    Dec 2010
    ciudadano del universo, residente de El Paso TX
    BS detector
    410 times
    Underground detection
    I don't know of any metal detectors that will be damaged by running without the searchcoil. Metal detector transmitters aren't like transmitters for wave antennas.

    Meanwhile, copied from another thread:

    Metal detectors are useless without a searchcoil, therefore operation without a searchcoil is undefined. Many metal detectors are very noisy without a searchcoil, and an individual metal detector may or may not be noisy without a searchcoil depending on EMI conditions, temperature, etc.

    The right question is why are you getting "false signals everywhere" with the searchcoil attached. That's a long list of possibilities: electrical interference, loose searchcoil connector, low batteries, drifted circuit calibration, defect developed in circuit, searchcoil or searchcoil cable developed a defect, failure to reduce the sensitivity level when necessary, .....some folks here can probably think of other possibilities.

    The quickest way to determine whether the searchcoil is at fault is to install a known good searchcoil. If you've got one.

    If you are unable to resolve the problem through the advice of folks here on the forum, the machine will probably have to go back to the factory for repair.



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