Just one little curiosity, the tech drawing says "Speaker & Receiver", so perhaps there are two coils? Bit unlikely but multimeter is going to tell. And its 8 ohm, so not piezo, but listed in Farnell as piezo...
Just one little curiosity, the tech drawing says "Speaker & Receiver", so perhaps there are two coils? Bit unlikely but multimeter is going to tell. And its 8 ohm, so not piezo, but listed in Farnell as piezo...