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Group magnet in Seeburg 100b
Posted: Mon Apr 13, 2015 7:13 pm
by eddie
Can someone explain how the group magnets works? Is it just to save the number of wires? The plates with all the fingers seems like it serves no purpose other than to ground the coils. Seems like it could have been done a lot easier than that. I must be missing something.
Re: Group magnet in Seeburg 100b
Posted: Tue Apr 14, 2015 3:08 pm
by eddie
I guess nobody understands them.
Re: Group magnet in Seeburg 100b
Posted: Tue Apr 14, 2015 4:43 pm
by Ron Rich
Eddie,
You got-it--there would need to be many more wires without the group magnet matrix--
Ron Rich
Re: Group magnet in Seeburg 100b
Posted: Wed Apr 15, 2015 2:38 pm
by eddie
Seems as though a simple relay would have worked just as well. I have to be missing something.
Re: Group magnet in Seeburg 100b
Posted: Wed Apr 15, 2015 5:03 pm
by Ron Rich
Hi Eddie,
The group magnet, and the grounding plates, make up a "relay" that has 20 contacts on it. Without using this arrangement, each coil would need to be wired back to the keyboard, twice, and the keyboard would need to be more complicated to serve each coil individually.
Ron Rich