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Recent content by lothian

  1. lothian

    BK80: Flipper Flutter

    I think I fixed the flutter. The EOS leaf was making contact with uninsulated bit of the crank tang. I repositioned the EOS so that it was fully within the insulated and flutter disappeared. Makes zero sense to me why this made any difference given that the flipper base plate carries zero...
  2. lothian

    Q: Coil Strength

    Coil sleeve is in excellent condition. EOS switch gap needs further inspection...
  3. lothian

    Q: Coil Strength

    Williams Black Knight. In the interest of brevity, I left out the miscellaneous t'shooting whatnots I've done so far. I swapped the coils and the problem persisted. I replaced the bushing and set the flipper-to-playfield gap with a credit card. The flipper shaft is secure in the flipper and...
  4. lothian

    Makers of Light Up Pin Blades

    non sequiturs comment here... I found a 22guage scrap of steel at a steel supply store. They were nice enough to slice it down to "pinball blade dimensions" for me. Total cost: $12. I plan to mirror-polish each and mount them into my pinball machine. My expectations with this low-budget...
  5. lothian

    Q: Coil Strength

    I read lots of good information about flipper coil issues within this forum and others. Poor flipper performance typically indicates a problem with something other than the coil because coils rarely go bad and never get weak. This statement seems to be the consensus among those knowledgeable of...
  6. lothian

    BK80: Flipper Flutter

    1) I removed the coil on the fluttering flipper (right) and checked its resistance with a DMM—it tests OK. 2) I removed the left coil where there is no flutter and wired it into place of the right. Result: The (right) flipper with the left coil flutters. I wired the right coil in place of the...
  7. lothian

    BK80: Flipper Flutter

    Black Knight 1980 The right lower-playfield flipper on my BK80 flutters when both upper and lower playfield flippers are "up". Flutter does not occur when I close the lower-playfield flipper contact or when I close the upper-playfield flipper contact—lower-playfield flipper flutters only when I...
  8. lothian

    Black Knight: Identify Playfield Something'r'other

    Thanks for that explanation!
  9. lothian

    BK80: T'shooting Wonky Lamp Behavior

    Inspired by this article and this video, I bought a Lamp Matrix Tester Board to assist me in t'shooting the aforementioned problem(s). I'll post a follow-up after I've done the deed.
  10. lothian

    Black Knight: Identify Playfield Something'r'other

    The artifacts circled in blue hide behind the center target of each of the four target banks on my machine. I presumed something had been removed, but these same affects appear on images of BK80 playfields other than mine! Anyone know what these things are and what purpose they serve(d)?
  11. lothian

    BK80: T'shooting Wonky Lamp Behavior

    Black Knight (1980) I'm working my way through a list of issues with my Black Knight. The thing suffers from some kind of attract mode lamp display problem that seems to affect the "sword" lamps in particular. The sword lamps seem to operate normally during game play mode, btw. The video below...
  12. lothian

    BK80: Rebuilding Upper-playfield Pop Bumper

    Black Knight - 1980 Following this resource, I've determined that my aged BK80's lone pop bumper needs a complete rebuild. I have a few questions for those experienced with such things. - Is there a "best in quality, completeness, and cost" pop bumper rebuild kit (alliteration unavoidable)...
  13. lothian

    BK80: Identify a Component

    Going the APC (brand) route and forsaking that anemic line filter offers benefits beyond filtering unwanted EMF and errant back voltages into the house mains. I may have stumbled onto a better solution. A call to APC product support is forthcoming.
  14. lothian

    BK80: Identify a Component

    I genuinely appreciate your responses. To clarify, the lights I observe flicker during game play are external to the pinball machine: lamps, ceiling lights, etc, To satisfy a hunch, I plugged the thing into a UPS (pretty much a line filter)--no more flickering (LED) lights on the house mains...
  15. lothian

    BK80: Identify a Component

    I'm t'shooting two items concurrently on my list of issues with this BK80: A half-a-second 60hz sound burst at power on, and flickering (LED) lights on the house mains circuit during game play. Now that I know what that line filter is intended to do, it seems unlikely that thing is...