[rotorwrench]

The vibrator coil in that horn design is an interesting deviation from the old conventional vibrators used in the past. The design was likely to make it more compact to fit inside the housing. I can't tell how much is adjustable on the points set up for this one. It appears to have an adjustment for diaphragm air gap and for tension on the points arm I just wonder what has been the failure point on these? Back in the day, they would adjust for a specific current draw of the vibrator circuit while in operation. No telling what the specs are for this design. A good set of points should last a long time on a vibrator circuit. If they are cheap crap than that might be the only problem.

The diaphragm has that washer fixed to it with the protrusion that I assume is what pushes against the points arm so as to open the points when it makes contact. This item has to be in proper position to operate the points or there will be no sounding function. The rest depends on the points condition and adjustment. If the points don't open then it won't vibrate. The air gap between the vibrator coil core & diaphragm has to be set to manufacturers specs what ever that is. I just know that the diaphragm has to be able to move for it to vibrate.