Re: Merctronic question

[jeff-register]

Jonny Evin
Before trying to file the contact points clean go to an electronics store & buy a burnishing tool. This is for cleaning up contact points.
This vibrator has a part number & you might try antique electronics to see if they can match your part number to a solid state vibrator using a S.C.R. as the switching device. There are 4 different vibrators, positive & negative ground & 6 & 12 volt versions. They were used in car radios for many years. It changed a direct voltage current from battery to a crude alternating current for a transformer as a trans requires a pulsing current to function. The car used the transformer output was used to run the heaters in the tubes as heat is required to move electrons which is basic radio function. The Vib in the MOT sends an adjustable voltage to test the magneto coil or magneto transformer to step up the voltage for spark. The capacitor in the meter may have failed too. You have 4 pins on the bottom voltage in & voltage out the same current but can’t measure as meters are set to 60 cycles unless using airplane current it runs on a different frequencys
You can test ANY coil by connecting the two wires from the primary voltage ( points & ground wires) of the coil to a 3 volt battery except put a big file on the pos lead to the file & drag the coil wire across the file to make a long spark. The pulsing current as the wire is drug across the file makes the pulse & that pulse will make a coil fire.