coil for whites classic form fisher 1236x2

[alcartraz]

any body know if i can rewire a fisher coil from a fisher 1236x2 and will it work on my whites classic 3 sl the plugs the same but wires are different a plug diagram would be good and the frequency is very close on both machines can any one help with this ??? or am i wasting my time i have an 8" coil and a 10" coil 14" coil all for my fisher 1200 sires i was planing on rewiring the 14 to work on the whites

[alcartraz]

i cant believe know one has tried this ?

[alcartraz]

any body know if i can rewire a fisher coil from a fisher 1236x2 and will it work on my whites classic 3 sl the plugs the same but wires are different a plug diagram would be good and the frequency is very close on both machines can any one help with this ??? or am i wasting my time i have an 8" coil and a 10" coil 14" coil all for my fisher 1200 sires i was planing on rewiring the 14 to work on the whites

no one got any pin outs of the socket ?

[Dave J.]

won't work. electrical parameters are completely different.

--Dave J.

[alcartraz]

thank you for taking the time to reply do you know exactly what parameters as i would like to learn /know why ?

[Dave J.]

The basic parameters of a VLF induction balance searchcoil are L, C, R, and resistive and reactive imbalance limits. To measure them you need a 1 and 10kHz (or fancier) LCR meter, signal generator, oscilloscope, knowledge of how the loop is wired, and knowledge of the algebra formulas for extrapolating LC measurements to frequencies other than the frequencies at which you made the measurements.

The searchcoils you asked about were designed by different engineers with different design philosophies working at different companies at different times, to match the requirements of different circuits. They're not compatible and there's nothing you can do to make them compatible. If you want a White's coil, buy White's. If you want a Fisher coil, buy Fisher.

That business about "the frequencies being close" is partly true, but it's also irrelevant. Urban mythology. The introduction of mainstream multiple frequency machines by Fisher and Minelab in 1991 should have killed that myth dead, but somehow it still persists.

--Dave J.

[alcartraz]

cool thanks for that great to learn now i can understand what your going on about and thinking about it the multiple frequency minelabs dont all share the same coils the idea poped into my head as i use cb radio and was presuming its like that different aerials for different frequency bands and thinking that a metal detector is like the radios as in transmit and receive now i know there is more to it thanks again for taking the time to explain