Announcement

Collapse
No announcement yet.

Phil Jones Bass M-500 power amp

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Phil Jones Bass M-500 power amp

    Does anyone have a schematic for the Power amp board for a PJB M-500? I'm finding this to be troublesome to work on due to part of the board being obscured by a heatsink and it's difficult to see where traces run.

    Tried three different contacts at PJ (including the man himself) but no reply.

  • #2
    EDIT: I had answered thinking it might be using a Class D cookie sized power amp but just checked its page and itīs a 19kg box of electronics, so it must be a normal Class AB one.

    Or maybe a quad rail Class F/G/H one (never remember which is which )
    Juan Manuel Fahey

    Comment


    • #3
      Its a regular AB amp with just +/- 70v rails. It's impressive how compact it is - really neat. But this goes against it when troubleshooting.

      Comment


      • #4
        Welcome back Mick, it's been awhile.
        Originally posted by Enzo
        I have a sign in my shop that says, "Never think up reasons not to check something."


        Comment


        • #5
          Nice to be back.

          Comment


          • #6
            Originally posted by g1 View Post
            Welcome back Mick, it's been awhile.
            I'll second that! Mick's back, woohoo! Bejeebers, it's been a long time. I'll take this as a good sign.
            Last edited by Leo_Gnardo; 07-11-2019, 07:30 PM.
            This isn't the future I signed up for.

            Comment

            Working...
            X