(Topic ID: 209960)

Nine Ball Overhaul -- My Attempt to Resurrect a Classic Stern

By TractorDoc

1 year ago

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  • 171 posts
  • 24 Pinsiders participating
  • Latest reply 1 year ago by TractorDoc
  • Topic is favorited by 33 Pinsiders


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#54 1 year ago

Mouser or Digikey are good sources for your capacitors. They are very easy to replace and your board will be like new once you do it.

Instead of nails for the rails, you may want to consider mini screws. They are a lot easier to install and remove if you ever want to do something again on the cabinet. I know they are not original/genuine, but will save tons of time in the future.


#64 1 year ago

Yes, I would replace the flimsy wires that came with the board with bigger gauge and clean copper.
Most likely, the copper on the 45 years old wires is somewhat corroded and offering an increased resistance.
This capacitor is what controls all your solenoids. You want some chunky wires that can transport a few amps, instantaneously.
I have repaired/redone three Bally pinballs (same as Stern electronics) and have always changed the original wires with multi-strands clean copper heavier gauge wires. It is worth it.


3 weeks later
#91 1 year ago

Beautiful restoration. I enjoy it a lot.


4 weeks later
#138 1 year ago

This is stunning. Congratulations.


#157 1 year ago

Beautiful machine.

Aren't you disturbed by how bright the displays are? How about the reflections on the playfield?
If you are using the original fluorescent displays, I would reduce the high voltage to 160VDC instead of 190 or plus. It will reduce the brightness of the displays and extend their life duration immensely.


#159 1 year ago

For the misbehaving switches, make sure they have a 0.047uF ceramic capacitor. Quite often, that is the reason.


#164 1 year ago

Definitely some improvements..... Fantastic job.


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