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KENWOOD KA-701 POWERS ON, NO RELAY CLICK

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    #61
    I did understand exactly what you mean. A 1/4w resistor has a physical smaller size than a 1/2w resistor. There is a wattage rating. So if you put for example a 1/4w resistor in a circuit designed for a 1/2w resistor, it will run hot and blow at some point. What did you replace the original resistors with? Did you go from carbon to metal film or something? As long as the new ones are rated for a 1/4w that's all that matters. Old carbon resistors are usually brown and huge compared to their modern equivalents.
    I wasn't aware that your 2 amps actually had different version boards.

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      #62
      Originally posted by CapLeaker View Post
      I did understand exactly what you mean. A 1/4w resistor has a physical smaller size than a 1/2w resistor. There is a wattage rating. So if you put for example a 1/4w resistor in a circuit designed for a 1/2w resistor, it will run hot and blow at some point. What did you replace the original resistors with? Did you go from carbon to metal film or something? As long as the new ones are rated for a 1/4w that's all that matters. Old carbon resistors are usually brown and huge compared to their modern equivalents.
      I wasn't aware that your 2 amps actually had different version boards.
      I matched all resistors, as per parts list if it's 1/4 w the new is 1/4w, no resistor is lower in wattage. I actually want to place some metal film in around those transistors. They are 1/2 w, and 1W mostly. The physical size in old resistors are a little bigger than the new resistors of the same value, that was my question, does that matter? Yes, same amp KA-701 INTEGRATED, has two different boards, I was actually surprised myself. The one we are working on has more caps (6 ). My amp has only one. Same with resistors, and Transistors. Are there a different set of schematics, I never found anything other than what we have. Will resume with component replacement. Starting with Q11, Q10, Q9, ect. Then the caps. I will then, replace those bad resistors.
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        #63
        Newer components are usually smaller than their old versions. Same with capacitors.

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          #64
          i would replace all those fusible resistors with metal film .

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            #65
            Originally posted by CapLeaker View Post
            Newer components are usually smaller than their old versions. Same with capacitors.
            Yes, I knew about the caps, I thought the resistors would be close to old size, but not so, as I'm seeing.

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              #66
              Originally posted by petehall347 View Post
              i would replace all those fusible resistors with metal film .
              I plan on it, going to place order on Friday, will continue, with the caps and transistors. Thanks

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                #67
                Well didn't get much done this weekend, but ordering some new metal film resistors. Resistors should arrive on Thursday. I'm going to replace some caps, till those new parts come in. Hope all had a great Mother's day, this past weekend.

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