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(Topic ID: 309708)

Coils and TX Relay

By CardTrix70

2 years ago



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    Lucky Hand B relay (resized).jpg
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    09FAC682-181E-4412-9450-992E8EEFD4FA (resized).jpeg
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    #1 2 years ago
    OP
     
    ???

    CardTrix70

    Pinside+ Frequent

    US Urbandale, IA

    5y 37,900 44 4

    I am shopping out a Gottlieb Lucky Hand and the coil on the B relay tests at 7.7 when wired in place and 14.9 when not wired in place. I see on the Omhs resistant chart that number should be 14.9. The coil number is A9735. What is the deal, am I missing something? Also on the TX relay armature (Tilt relay) the point stack leafs are bent like someone messed with them, see photos. Does anyone have an idea of how they are suppose to be correctly sitting in the armature? Thanks

    09FAC682-181E-4412-9450-992E8EEFD4FA (resized).jpeg09FAC682-181E-4412-9450-992E8EEFD4FA (resized).jpeg2C8EA8B6-54CE-4782-8E91-7CF061703F34 (resized).jpeg2C8EA8B6-54CE-4782-8E91-7CF061703F34 (resized).jpeg
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    #2 2 years ago
     
    GHL

    Garrett

    Pinside+ Frequent

    US Pinckney, MI

    11y 92,300 3,261 3 45

    Yes, someone did adjust the contacts without using the proper tool. That's why they are crinkled looking.

    Some would suggest replacing them and make sure you have the proper gapping tool. I would replace them. You likely can set the gaps properly, just harder to do in that condition, more time consuming.

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    #3 2 years ago
     
    M

    MarkG

    Fun With Pinball

    9y 71,300 4,363

    OP
    Quoted from CardTrix70:

    the coil on the B relay tests at 7.7 when wired in place and 14.9 when not wired in place. What is the deal, am I missing something?

    You can't reliably measure a device in circuit unless you know that there's nothing else in the circuit that might affect the measurement.
    Lucky Hand B relay (resized).jpgLucky Hand B relay (resized).jpg
    In this case the B relay coil is wired in parallel with another coil so what you're measuring is the resistance of two coils wired in parallel, which won't be the resistance of either coil.

    /Mark

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    #4 2 years ago
    OP
     
    ???

    CardTrix70

    Pinside+ Frequent

    US Urbandale, IA

    5y 37,900 44 4

    Mark, thanks for explaining that to me, I get it now.

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