Hi there,
My LOTR coil are pretty busted, so much so that the sleeve is "fused" inside and can't be removed... Coming from a routed Italy container game. While I get new ones I have a pair of spare RBION coil but the P/N is different.

LOTR: 090-5020-2OT
RBION: 090-5032-OT

Reading http://www.pinballmedic.net/coil_chart.html I understand that the RBION coil have more winding (22 - 1080) compare to the LOTR (22 - 900) making them weaker.
Could I just remove some winding of the RBION coil and use them as replacement? 17% of the winding is the correct math (how much inches/feet is that)?

Can I check the resistance with a multimeter between the 2 coils and see if they match to make sure they are the same strength as the LOTR one?

thanks, I did remove quite a bit of winding from the coil but the resistance went up? My previous LOTR coild were at 5.2 Ohms while the RBION coil were at 6 Ohms. Which I thought makade sense since there was about 20 more winding.
However, upon removing winding on the RBION coil, instead of getting closer to the LOTR coil it went up to 6.5-7 Ohms...? Less winding means high Ohms reading? If that is the case why are the LOTR coil lower?

I understand getting coils is the right way to do it, just curious

yeah I left the diode in between all the testing? It's interesting, I m just not sure how to know if I took out enough winding?

thanks interesting stuff. I may just end up going the easier route and get new factory LOTR coil since I can't be sure my "upgraded" RBION strength would be similar but it's a good topic