(Topic ID: 215151)

Why are relay assemblies mounted on rubber grommets?

By spinal

5 years ago



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  • Latest reply 5 years ago by spinal
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    #1 5 years ago

    On my mid-70's Gottliebs, relays are often mounted using rubber grommets so that they can move a bit. My question is why is this the case?

    So they operate better like this? Is it to dampen sound? So that nudging has a bit less chance to transfer to and possible activate relay switches? Anti-cheat?

    Your thoughts appreciated as trying to understand the motivation behind design - thanks.

    (Attached a pic of a typical GTB relay bracket)

    image (resized).jpegimage (resized).jpeg

    #2 5 years ago

    Because pop bumpers/sling shots send a lot of vibrations thru the pf. Without the damping you'd see pop bumpers in a feedback loop continually firing...

    I always like my "bang the center of the pf with my fist" test, if you got a pop or rollover contact adjusted too close you'll find it.

    #3 5 years ago

    Ok thanks

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