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Building from Scratch Test Results

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  • #16
    Tried Alternate Diff Coil (looks Striped - I call it my Tiger Coil) :
    1: 60 foot length : Looped 1 Transmit 1mm wire , Looped 16 Receive 0.2mm Wires (total receive wire = 900ft).
    2. Twisted all Wires at 1inch Intervals - 720 Twists with Drill.
    3: Looped 15 times around 15inch Spoked Template.
    4: Reconnected Receive wires in End-back-to-Start of next wire - like the Transmit-Receive wires.
    -- Theory: - more Receive Winds will Multiply return Voltage.



    Tested:
    - Connected in place of old Diff-Transmit-Receive Coil
    . . - ( Deffinately check that it is connected to circuitry correctly, Transmit Wattage will probably fry the receive wires if hooked up backwards ! )
    => Mixed Results - bigger Wave - very solid and clear , seemed to still shift with Targets.
    => Worked sometimes - unsure why yet (was late night - had limited time & concentration) - will try again when have more time.

    jlsilicon
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    • #17
      I tried using the Ad9220.
      But it has a Data result Drift - that I cannot seem to get around (parasitic capacitance ?)

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      • #18
        I got the THAT1510 working with the ACL7660 instead of the 79L05 !
        - something messed up in thr Diode Limiters though - needed to bypass them.
        Also, getting a weird Square Wave interference now at 500KHz of 20mV (radio) ?

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