Too bad - I was hoping that L504 or L514 was broken, since they are so easy to replace.
To test L501, the 330uH choke, I would first test it for proper continuity through the circuit card by probing the devices it connects to.? That would be the top end of D502 and C504.? Those are the large-ish diode and capacitor along the sides of L501.? The top end of the diode is toward the edge of the circuit card, and it is the stripe on the capacitor.? This should show continuity (a few tenths of an ohm or so), and I would touch the coil while measuring, and apply a little pressure to move it around a bit to see if there is an intermittent connection.? Likewise with power on and in transmit mode, the voltage to ground from either of those points should be about the same.? If you look at the voltage on those points with an oscilloscope, you will see some saw-tooth-like variations at the frequency of the switching, around the DC value, with the capacitor side being somewhat more filtered.
I hope that shows something.? You can also check for continuity across L504 and L514 in case something is hidden there.
Stan
