M-24-350 triple bonus relay. Tested out at 1.5 ohms. 50% of the time on the last ball I get the triple bonus. Tested it today and the relay didn’t close all the way and was just buzzing. Touched it and it closed it opened easy by my finger and buzzed again.
The majority of EM coils should be above 2.0 ohms. If you're getting a low reading, test the coil again with the wires removed. Here is a link to a coil resistance chart:
https://www.flippers.com/coil-resistance.html
There is a listing for a M24-350 coil and it is rated at 2.4 ohms...
The buzzing means the coil is struggling to pull in the switch plate. Possible causes could be a damaged spring where there is too much tension, misaligned switch plate or a weak/damaged coil...
Guessing the relay is weak. Tested at 1.5 ohms. I cleaned everything and tension is the same on all relays. Spring is perfect.
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Brookfield, WI