Basic DPDT question

Discussion in 'Tele-Technical' started by old_picker, Mar 28, 2020.

  1. old_picker

    old_picker Tele-Afflicted

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    Got some 6 pole mini switches here but unsure wether they are on-on-on or on-off-on. they have three distinct positions on the switch tip.

    how do I test them with a multimeter so I know what they are ?

    thanks in advance
     
  2. moosie

    moosie Doctor of Teleocity Ad Free Member

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    Assume the center lug on each bank of three is the common.

    Clip one lead to that. Clip other lead to one of the other two lugs. With your meter in continuity mode (or resistance if you don't have a 'beep' mode), test by moving the switch to the extreme (not center) position that your lug applies to. If it beeps, then your setup works.

    Now, with one lead clipped to center, leave the switch in the center position, and touch the other lead to each of the extreme lugs. If you have continuity either place, it's an ON-ON-ON. A ON-OFF-ON, the middle lug will connect to nothing in middle position.
     
    CCK1 and Steve 78 like this.
  3. teleplayr

    teleplayr Tele-Afflicted

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    Contact the manufacturer and ask.
     
  4. old_picker

    old_picker Tele-Afflicted

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    Thanks moosie for that simple test
    Many thanks

    Again
     
  5. moosie

    moosie Doctor of Teleocity Ad Free Member

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    I don't think I've ever seen a 6-pole mini toggle. Care to post a pic?
     
  6. old_picker

    old_picker Tele-Afflicted

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    uhm I think I should have said tags - as you said - two banks of three
     
  7. kbold

    kbold Tele-Afflicted Silver Supporter

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    Suspect he means the number of pins on the switch.

    Edit: already answered.
     
  8. moosie

    moosie Doctor of Teleocity Ad Free Member

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    Ah. Well, the test is the same.

    It's always good to test an unfamiliar switch. That said, all on-on-on switches I've seen (both DPDT and 4PDT) are laid out like this:

    Screen Shot 2020-03-28 at 03.09.52 PM.png
    My color coding is green for common, and yellow for the special lugs, the ones that engage in the middle position.

    Looking at the switch upside down, when the toggle bat is DOWN, the lugs are internally connected like the one on the left.

    The right diagram is with the bat UP.

    The center diagram is, you guessed it, the middle position.

    While they can be used a bunch of ways, one common scenario is when you want a SP3T. One wire, switched three different ways. It's done by adding the red jumper:

    Screen Shot 2020-03-28 at 03.16.00 PM.png
     
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