(Topic ID: 205045)

Which 44 bulbs do you not replace with 47s?

By spinal

6 years ago


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Topic Stats

  • 25 posts
  • 18 Pinsiders participating
  • Latest reply 6 years ago by Darcy
  • Topic is favorited by 1 Pinsider

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    Topic poll

    “I...”

    • Replace all 44 bulbs with 47s 15 votes
      63%
    • Replace some 44s with 47s (comment on where you keep 44s pls) 3 votes
      13%
    • Stick with 44 bulbs only 6 votes
      25%

    (24 votes)

    You're currently viewing posts by Pinsider gdonovan.
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    #16 6 years ago

    Some Gottliebs require 44's if there is a resistor in the circuit.

    Examples: Ship Ahoy for WOW and Spinner indicator and Orbit Special indicator behind Vari-target.

    Replacing a 44 with a 47 changes the resistance in the circuit causing excessive voltage and very short bulb life.

    Large ceramic resistor attached to socket or nearby will indicate need for 44's

    Gary

    #24 6 years ago
    Quoted from jrpinball:

    I wonder if bypassing or removing the resistor and installing a 24v lamp would work in these situations. I've never tried it.

    I changed the value of the resistor to lower the voltage. Even with a stock 44 bulb they run at 7.5 volts which is a bit much. I think I swapped out to 100k or 125k (I forget off hand but have a bag of them in the garage if anyone wants one) and ended up at 5.5v with a 44 which works fine.

    LED lasts for... 30 seconds. poof!

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