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Icom PS-15 power supply

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    Icom PS-15 power supply

    Hi!
    I have an old (but good) Icom PS-15 power supply.
    This PSU was modified by a technical and now the original control circuit is no longer there.
    I want to make the original circuit because the modified circuit don't work fine.

    The original circuit use an old components and i need help to find (if possible) equivalent (but modern) components.

    The first components is U05, rectifier/filter.
    The second is XZ-051, reference voltage.






    Thank you for help.

    Alberto

    #2
    Re: Icom PS-15 power supply

    XZ-051 is just 1 5.1 volt 1 watt zener diode. D4 & D5 could be any general purpose 1 amp diode like 1n4007
    Last edited by R_J; 04-19-2021, 11:36 AM.

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      #3
      Re: Icom PS-15 power supply

      Originally posted by R_J View Post
      XZ-051 is just 1 5.1 volt 1 watt zener diode. D4 & D5 could be any general purpose 1 amp diode like 1n4007
      Thank you very much!

      in your opinion what is this circled in red?

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        #4
        Re: Icom PS-15 power supply

        That is the adjustment pot. R9 500Ω What you circled is the controls wiper. (the center pin of the control)

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          #5
          Re: Icom PS-15 power supply

          What was the hack that was done?

          Doesn't appear to have much protection circuit in this original circuit... so is it better?

          I guess if the hack doesn't work, it doesn't work...

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