(Topic ID: 234381)

Bally coil question...


By Inkochnito

8 months ago



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  • Latest reply 8 months ago by Inkochnito
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#1 8 months ago

I have a Bally Nip-It for repairs.
The coil for the 00-90 units is burned to crispy brown.
This should be a B 27-1300 coil.
I do have an A 27-1300 coil.
Is there any difference between them?
Maybe just the diode (which I will cut off)...

Peter

#3 8 months ago
Quoted from Atari_Daze:

Hey Peter, I think the only difference is the sleeve / aka bobbin...
from https://www.flippers.com/coil-resistance.html
Note that if you can't find your exact coil that you can ignore the letter prefixes as the part that matters is the gauge and the number of turns. Different style coils with the same gauge and number of turns should be identical resistance...so a coil designated as X-YY-ZZZZ means that X = style of bobbin, YY = wire gauge, ZZZZ = # of turns.

Thanks pal, just what I wanted to know.

#5 8 months ago

You are right!
The bobbin is just a big larger.
The difference is 1.5mm, which I think can be overcome by enlarging the coil stop holes.
Making them oval insted of round.

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