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Samson XM610 powered PA

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  • #16
    It is just a base resistor, half watt will be fine. Use a metal film type.

    Color code does not specify wattage.
    Education is what you're left with after you have forgotten what you have learned.

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    • #17
      Originally posted by Enzo View Post
      It is just a base resistor, half watt will be fine. Use a metal film type.

      Color code does not specify wattage.
      Ok I replaced all the ones that were measuring like 10 megs on my fluke. The 100 ohm resistors in circuit measure 50 ohms. When I lift one leg I get the 100 ohm measurement.
      R158 though has me confused. It is a 100 ohm resistor and measures a 100 ohm in or out of circuit. I don't quite understand why I'm seeing it. But i don't think it's right.
      Thanks,

      nosaj
      soldering stuff that's broken, breaking stuff that works, Yeah!

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      • #18
        R158 & R159 are paralleled with R146 & R147, so you should measure in the 50 Ohm neighborhood in circuit across R158. Either one of those 4 resistors is open, or an open solder connection/burnt trace exists.
        "I took a photo of my ohm meter... It didn't help." Enzo 8/20/22

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        • #19
          Originally posted by The Dude View Post
          R158 & R159 are paralleled with R146 & R147, so you should measure in the 50 Ohm neighborhood in circuit across R158. Either one of those 4 resistors is open, or an open solder connection/burnt trace exists.
          R159 was opened. I replaced it. I think I'm ready to put the boards back in and give a test run. Replaced the shorted output transistors and opened resistors. Will follow up tomorrow evening.

          Thanks so much,
          nosaj
          soldering stuff that's broken, breaking stuff that works, Yeah!

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