Here is a table containing the inductance values for the set of 4 LF
Coils. Note the pinout (my pin numbering, as seen from the bottom.)
Pin 1
Pin 2
Pin 3
COIL
Freq Range (kHz)
Pins 1-2
Pins 2-3
Pins 1-3
46702
925
- 2000
525.3uH
196.3uH
214.9uH
46703
500
- 1050
1.781mH
673uH
664uH
46704
325
- 600
4.683mH
1.696mH
1.702mH
46705
220
- 350
9.144mH
3.671mH
3.491mH
While the units appear to have two
coils, they effectively have three. Both of the 'two' coils have only
two wires leading to the base. The wires from the lower coil go to pins
2 and 3. Pin 3 is a common, having a wire from both the upper and the
lower coils joined there. The upper coil has two wires, one going to pin
3, and one going to pin 1. Obviously-from the value differences between
(1-2) and [(2-3) plus (1-3)] there is a third winding.
There is no observable difference
between the upper and lower coils of 46705 (which-having the largest
inductance difference-would surely be the more easily observed.) The
wires going to pins 1 and 2 from each coil clearly come from the outside
of the coil, leaving no room for doubt about those wire ends belonging
to the main coil components. Best I can do folks.
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