Hi Guys
I had a faulty 8 inch mono coil - it looked 'perfect' but constantly falses. Cutting the coil wiring, and rewiring made zero difference....so, decided to dissect the coil!
Well, actually using a hammer!
It turns out the coil really cannot be 'repaired'. Seems there are two distinct layers of epoxy, looking from the bottom of the coil, at the black epoxy, there is an initial 'thin' layer of epoxy, maybe 3mm think. removing this, there is the BLACK screen wire.
***I would guess, a falsing or noisy 8 inch coil, could be caused by a loose screen wire - maybe removing this layer and redoing the screen connector MAY have fixed the coil...***
Digging deeper, there is a much thicker layer of epoxy, and two separate coil windings, TX and RX, there is a POT for adjustment/tune and unfortunately a small circa 1-inch square circuit board that CANNOT be repaired, removing the epoxy destroys all of the surface mounted components.
Just thought it was nice to give others a 'heads up'.
If a frayed coil leaks, I guess it is a "potential" for water to track down the cable to the circuit board, but, it does seem pretty well 'potted in'.
If my new 8 inch coil ever breaks, my first point of call, aside from trying the cable replacement, would be the lower epoxy layer and attempted screen repair...
I had a faulty 8 inch mono coil - it looked 'perfect' but constantly falses. Cutting the coil wiring, and rewiring made zero difference....so, decided to dissect the coil!
Well, actually using a hammer!
It turns out the coil really cannot be 'repaired'. Seems there are two distinct layers of epoxy, looking from the bottom of the coil, at the black epoxy, there is an initial 'thin' layer of epoxy, maybe 3mm think. removing this, there is the BLACK screen wire.
***I would guess, a falsing or noisy 8 inch coil, could be caused by a loose screen wire - maybe removing this layer and redoing the screen connector MAY have fixed the coil...***
Digging deeper, there is a much thicker layer of epoxy, and two separate coil windings, TX and RX, there is a POT for adjustment/tune and unfortunately a small circa 1-inch square circuit board that CANNOT be repaired, removing the epoxy destroys all of the surface mounted components.
Just thought it was nice to give others a 'heads up'.
If a frayed coil leaks, I guess it is a "potential" for water to track down the cable to the circuit board, but, it does seem pretty well 'potted in'.
If my new 8 inch coil ever breaks, my first point of call, aside from trying the cable replacement, would be the lower epoxy layer and attempted screen repair...