1966 Voltage Regulators?

Discussion in 'Early A-Body Discussions' started by coalman, Sep 14, 2018.

  1. coalman

    coalman Well-Known Member

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    Have any you tested these on the bench with a multimeter? If so, how, I have three and want to check them. I have a long running Thread on charging problems under Electrical. Thanks
     
  2. memike

    memike Super Moderator Staff Member FABO Gold Member

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    Not sure why you don't just switch to the newer style regulator
     
  3. halifaxhops

    halifaxhops It's going to get stupid around here! FABO Gold Member

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    Think it has to be on the car per the 66 FSM
     
  4. coalman

    coalman Well-Known Member

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    I have two solid state ones that look like the original, and one reproduction mechanical. Thanks
     
  5. KitCarlson

    KitCarlson Well-Known Member

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    A simple test is done using a bench top power supply with adjustable voltage, 3A or more current capability, a voltmeter and 12 volt bulb. The bulb is placed on the regulator FLD terminal, the other terminal on ground (regulator case). The power supply (+) is connected to regulator IGN, (-) to regulator case.

    Test as follows: Use meter to monitor voltage at IGN to regulator case. Set supply voltage to 12V, the bulb, should be lit, increase voltage slowly, the bulb will go out when the voltage is increased to regulating point, typically a few tenths around 13.8V. The bulb should turn back on as voltage is reduced, a bit below the regulating point.

    For new two field terminal regulators, the bulb is connected from FLD terminal to (+) power supply, not ground as in early regulator test.
     
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    • coalman

      coalman Well-Known Member

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      Thanks for response, I have been out of town or I would have responded sooner...
       
    • 67Dart273

      67Dart273 Well-Known Member

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    • coalman

      coalman Well-Known Member

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      Any suggestions for the bench top power supply? Thanks
       
    • 67Dart273

      67Dart273 Well-Known Member

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      Egag, Mouser, Digikey, the smaller electronics supply, houses..........or find an old rheostat. You happen to have an alternator/ generator test set?

      18V 3 A Bench Power Supply | MPJA.COM

      30V 5A Digital DC Power Supply Variable Adjustable Lab Bench Test Equipment Tool 743828299538 | eBay


      BUT BE CAREFUL. This one is not "variable" but rather "selectable".........it has SWITCH POSITIONS

      PS-28A | ADJUSTABLE VARIABLE POWER SUPPLY BENCH DC OUTPUT 12V 9V 7.5V 6V 4.5V 3V 744633428489 | eBay

      This little kit will give you 1A output which may or may not be enough

      Variable Power Supply Kit | Alltronics
       
      Last edited: Oct 7, 2018
    • coalman

      coalman Well-Known Member

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      Thanks for all the input, how about the PS-28A, the price is affordable?
       
    • KitCarlson

      KitCarlson Well-Known Member

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      I have had good luck with Marlin P Jones. A quick check shows most of their supplies out of stock, at the moment. My 0-30V, 3A supply is 15 years old, works great. Adjustable current is a big help, it will hold that current with a short. I use it when checking wiring and electronics instead of battery. If I were to buy another, would get 10A unit. For large currents I use 20A 13.8V fixed supply for ignition and EFI development work.
       
    • KitCarlson

      KitCarlson Well-Known Member

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      The PS28A has voltage steps, it will not help you test regulator.
       
    • coalman

      coalman Well-Known Member

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      Not a win situation!! Thanks
       
    • coalman

      coalman Well-Known Member

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      Found this on "E" Bay DC POWER SUPPLY QW-MS305D, will this work??? Thanks
       
    • 67Dart273

      67Dart273 Well-Known Member

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      Link?

      LOL that is what I posted above. I can't speak for the quality of these, but the specs indicate it should be adequate. You might google the "model" and look for reviews