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KENWOOD KA-701 POWERS ON, NO RELAY CLICK

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    #41
    Originally posted by petehall347 View Post

    d9 d10 is it ? remove one and use resistor and 2x 9v batteries and volt meter .
    Not exactly sure, just looking at parts list. Never did what you are suggesting. Will need additional instructions. Thanks. I found all parts that were originals, except zener diode.

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      #42
      Originally posted by CapLeaker View Post
      These XZxxx zeners are a bit weird numbered. For example a XZ051 equals a 5.1V zener. It is NOT a 51V zener.
      So what you are looking at is a XZ100 zener. That makes it a 10V. Check it out like petehall347 said above.
      I did order about 8- 10v zeners, I thought it was a 10v, but wasn't sure.

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        #43
        Originally posted by petehall347 View Post

        d9 d10 is it ? remove one and use resistor and 2x 9v batteries and volt meter .
        Yes, D9-10

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          #44
          Originally posted by CapLeaker View Post
          These XZxxx zeners are a bit weird numbered. For example a XZ051 equals a 5.1V zener. It is NOT a 51V zener.
          So what you are looking at is a XZ100 zener. That makes it a 10V. Check it out like petehall347 said above.
          Also looking for equivalent to WZ-300, WZ-240, these are zeners, and Diode 1N60. Any suggestions. Trying to find replacements for the plate resistors as well, they are 33ohm, 10% 3W resistors.

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            #45
            Geez... all that is broken? Can't be.
            The 1N60 is a germanium diode. It is still available for sale for example futurelec.com. Also 1N34A, BAT41,1N60P etc.
            WZ series zener diodes are 0.5 Watt type. Again a WZ240 = 24V. WZ300 = 30V.
            As for the plate resistors... I dunno. Are they bad?

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              #46
              Originally posted by CapLeaker View Post
              Geez... all that is broken? Can't be.
              The 1N60 is a germanium diode. It is still available for sale for example futurelec.com. Also 1N34A, BAT41,1N60P etc.
              WZ series zener diodes are 0.5 Watt type. Again a WZ240 = 24V. WZ300 = 30V.
              As for the plate resistors... I dunno. Are they bad?
              No, not all are bad, but I have two of these amps, mine, and my dad's which we are currently working on.I plan on doing a complete overhaul on both eventually so I'm locating parts for both.My philosophy is If I'm pulling it out to check it, it's getting replaced good or bad. I only work on my stuff, and the parts are not that crazy expensive. Except those output Trans I blew. I do believe some parts are coming today. Thanks again for all your help on this project.

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                #47
                I get the germanium diodes… they can break by just using too much heat. The resistors, I'd leave alone unless they are burnt, open, or out of tolerance. Definitely change all the caps then.

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                  #48
                  Originally posted by CapLeaker View Post
                  I get the germanium diodes… they can break by just using too much heat. The resistors, I'd leave alone unless they are burnt, open, or out of tolerance. Definitely change all the caps then.
                  Most of them resistors are dark, I will check each piece, as I go along,I do have enough to replace all components on the the board though. I'm going to replace everything on that side by Trans.Q11 the problem in the first place, before I caused the rest of the damage with my slip.

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                    #49
                    Well parts came in and, most of the resistors have to be returned, so It will be another week at least before I can get started. I do have the big output transistors so I'm going to start there, then the smaller Trans. Caps will follow. At that point I should have the resistors. I will change everything around Q11, because of the short I caused. I,'LL post pics of each step. Thanks guys, and have a great weekend.

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                      #50
                      Maybe take on high resolution picture from the boards each from top, it's kind of hard to follow a board in sections.

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                        #51
                        Originally posted by CapLeaker View Post
                        Maybe take on high resolution picture from the boards each from top, it's kind of hard to follow a board in sections.
                        Ok will get that this weekend, and post.Have a great weekend sir.

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                          #52
                          Starting on Tuesday replacing, some components. I will start with Q11, and do those 4 transistors, then the caps, followed by the 4 big output transistors. I'll post some pics as I go along.

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                            #53
                            Originally posted by rccrasher65 View Post
                            Starting on Tuesday replacing, some components. I will start with Q11, and do those 4 transistors, then the caps, followed by the 4 big output transistors. I'll post some pics as I go along.
                            Started today with some component replacement.I decided to start with the hardest first, those output transistors, 5 1/2hrs for 2. What a PITA, those were, who ever designed this needs a good ass kicking, but they got done with a lot of words not permitted here. Once they are done, tomorrow, I will post some pics. Then onto Q11, Q10, Q9 ect. Caps will follow. Thanks for your patience guys, will keep you posted. Thanks again.

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