(Topic ID: 234381)

Bally coil question...


By Inkochnito

4 months ago



Topic Stats

  • 5 posts
  • 3 Pinsiders participating
  • Latest reply 4 months ago by Inkochnito
  • No one calls this topic a favorite

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#1 4 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

#2 4 months ago

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.

#3 4 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.

#4 4 months ago
Quoted from Inkochnito:

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

The length of the coil will be the problem trying to put an "A" coil in where a "B" coil fits.
Just ran into the same thing on my Bally Amigo project. Coil stop won't fit due to the extra length.

#5 4 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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