Register a free account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!
The middle lug is just there to make it simper to solder the two diodes on. Not all coils need two diodes, hence not all are supplied with the third lug. On bally, i think it is the presence of the solenoid expander board that leads to this doubling up of diodes on coils. The middle lug is not connected to the windings of the coil, so you can almost certainly use the two lug version, you just have to fashion the second diode connection yourself in the middle of the plastic between the external lugs
Many coils have a gap in the plastic for a third lug to be inserted, you just poke a diode through here and bend it into a middle lug
now confused on old bally coil 1diode goes from middle to outside and 1 diode spans both outside connections
so what is the point of middle connection diode just curious, seems strange to put it on if not connected
bear with me i'm just learning about pinballs
its on the outhole kicker on a vector
The middle lug is there to solder the solenoid wire onto so you can easily insert a diode " in series " into the circuit
The diode then carries current between this middle lug and the outer lug
You could forget about the middle lug altogether. Just solder the wire to the loose diode. Then the other end of the diode to the outer lug. Cover the lot in heat shrink so that the wire ends of the diode are insulated from the rest of the game. But this is a bit of a "hack" or botched job
The middle lug just makes soldering easier and the resulting join more robust