(Topic ID: 287644)

Easy Williams chime modification-Sounds much nicer now

By jasonspoint28

8 months ago



Topic Stats

  • 7 posts
  • 2 Pinsiders participating
  • Latest reply 8 months ago by jasonspoint28
  • Topic is favorited by 3 Pinsiders

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#1 8 months ago

I picked up a Travel Time a while back that had a chime unit that was in poor condition. Besides the usual rebuild stuff, it was missing a plunger and the long bar was broken.

To try my hand at making my own replacement bar, I purchased 1/8” x 1 1/2” aluminum flat stock from Menards. Instead of replicating the dull sounding Williams bar, I decided to try to improve the sound by borrowing some ideas from my Gold Strike.

The mounting holes for Williams are all spaced 90mm apart, but the Gottlieb has spacing of about 88mm, 85mm, and 80mm. To accommodate the cascading hole spacing, I just bent the Williams bracket inward a few degrees on each side and surprisingly was able to get real close to 88, 85, and 80.

The flat stock got cut to the same dimensions as the Gottlieb’s- 175, 161, and 146.5mm, but the holes needed to be larger for the mounting system of the Williams bracket.

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#2 8 months ago

The plastic resonator box was found on EBay, thanks to pinhead52. I cut up a quick bracket from some tin I had in the garage and mounted it to the side of the chime bracket.

The retaining bars no longer fit because of the shorter hole spacing, so I just used extra nylon washers for the time being. Maybe when they wear out I’ll fab up some new metal retainers.

#3 8 months ago

I also had to rewire the coils to get the 1000 on the long bar, the 100 on the middle, and 10 on the short.

Sounds pretty decent, still not as pretty as my wedgeheads, but not bad.

#4 8 months ago

I’ve had conversations with fellow Pinsiders about the importance of node spacing, so here’s what I found on the Gold Strike. The long bar had nodes that were 24.9% from the end. Middle was 23.6%, and shorty was 22.7%. Seems like the longer the bar, the farther in from the end they put the nodes. I checked my daughter’s percussion bells and they have a similar pattern, but entirely different % since they are much skinnier than 1 1/2” and thinner too.

#5 8 months ago

Interestingly enough, the old Williams bars were within a millimeter in total length of the Gottlieb. Seems to me like they were trying to sound like Gottlieb, but came up short-maybe to save a few bucks.

A guy (or gal) could probably use an extra set of Gottlieb bars instead of cutting your own-as long as you don’t mind drilling the holes bigger.

#6 8 months ago

Well done. Here's some explanation and video to demonstrate why the spacing is important:
https://www.funwithpinball.com/learn/chimes-vibrations-and-pitches

/Mark

#7 8 months ago

Thanks Mark. Love the Fun With Pinball site! I appreciate the time you take to put that stuff together.

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