Announcement

Collapse
No announcement yet.

OK Then

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

  • #76
    Originally posted by Tone Meister View Post
    The amp produces 2Vrms with the volume control wide open.
    Please measure the AC voltage at the power tube grid when you are getting that 2Vrms (before you gut it ).
    Originally posted by Enzo
    I have a sign in my shop that says, "Never think up reasons not to check something."


    Comment


    • #77
      I've been playing the snot out of it all week and I like it the way it is. It sounds about right to me - decent cleans with amp volume on 8 and the typical grind when it's dimed - but a detectable volume difference when compared to mine.

      4.9Vrms at the 6V6 grid

      Comment


      • #78
        Well I'll guess that the signal is padded between the second preamp stage and the power tube grid then. It's very hard to see what all is going on in the pics because of the angle of shots and, of course, the nature of the wiring as it is. But what is THIS resistor doing? (circled in red) It sort of hides behind other stuff in all but this shot and I can't see well what it's connected to.
        Attached Files
        Last edited by Chuck H; 02-01-2019, 12:27 PM.
        "Take two placebos, works twice as well." Enzo

        "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

        "If you're not interested in opinions and the experience of others, why even start a thread?
        You can't just expect consent." Helmholtz

        Comment


        • #79
          That circled resistor is the 220k grid leak

          Comment


          • #80
            Originally posted by Tone Meister View Post
            That circled resistor is the 220k grid leak
            Ok. Then what is this one doing? It's clearly a different resistor.
            Attached Files
            "Take two placebos, works twice as well." Enzo

            "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

            "If you're not interested in opinions and the experience of others, why even start a thread?
            You can't just expect consent." Helmholtz

            Comment


            • #81
              I can't tell what pin the resistor I indicated in post #80 is connected to. Could it be a HV bleeder? I don't think so.It's proximity is on the correct side of the coupling cap to be the power tube grid leak and I can't see how the resistor I indicated in post #78 could be connected to the correct end on the coupling cap to be the power tube grid leak.
              "Take two placebos, works twice as well." Enzo

              "Now get off my lawn with your silicooties and boom-chucka speakers and computers masquerading as amplifiers" Justin Thomas

              "If you're not interested in opinions and the experience of others, why even start a thread?
              You can't just expect consent." Helmholtz

              Comment


              • #82
                Wow.....I would not put my name on that.

                Dude, you gotta' pull back and give us a nice clean pic of the whole chassis We need to see this in proper context to fully appreciate how ugly it is!

                Then take a nice pic after you gut it and rebuild it properly.

                Comment


                • #83
                  Originally posted by drewl View Post
                  Wow.....I would not put my name on that.

                  Dude, you gotta' pull back and give us a nice clean pic of the whole chassis We need to see this in proper context to fully appreciate how ugly it is!

                  Then take a nice pic after you gut it and rebuild it properly.
                  Remember. You asked.

                  Click image for larger version

Name:	20190201_144143.jpg
Views:	1
Size:	1.50 MB
ID:	852954

                  Click image for larger version

Name:	20190201_144150.jpg
Views:	1
Size:	1.09 MB
ID:	852955

                  Click image for larger version

Name:	20190201_144202.jpg
Views:	1
Size:	1.06 MB
ID:	852956

                  Click image for larger version

Name:	20190201_144216.jpg
Views:	1
Size:	1.57 MB
ID:	852957

                  With and without flash.

                  Comment


                  • #84
                    My eyes! My eyes!

                    What has been seen, cannot be un-seen...

                    If it ain't broke I'll fix it until it is...
                    I have just enough knowledge to be dangerous...

                    Comment


                    • #85
                      Originally posted by Tone Meister View Post
                      Remember. You asked.

                      [ATTACH=CONFIG]52319[/ATTACH]

                      [ATTACH=CONFIG]52320[/ATTACH]

                      [ATTACH=CONFIG]52321[/ATTACH]

                      [ATTACH=CONFIG]52322[/ATTACH]

                      With and without flash.
                      I say lift that cap on the vol switch just one side and see what happens to your wattage.

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

                      Comment


                      • #86
                        edit: so the resistor in post #78 is actually 100K ?
                        Last edited by g1; 02-01-2019, 08:08 PM.
                        Originally posted by Enzo
                        I have a sign in my shop that says, "Never think up reasons not to check something."


                        Comment


                        • #87
                          I think you might get some joy of documenting the post-mortem on this beast. Put all the components (or assemblies of components) onto a nice, white, sheet of paper in order to reconstruct the layout under laboratory conditions. You could be a CSI: Champ Schematic Investigator
                          If it still won't get loud enough, it's probably broken. - Steve Conner
                          If the thing works, stop fixing it. - Enzo
                          We need more chaos in music, in art... I'm here to make it. - Justin Thomas
                          MANY things in human experience can be easily differentiated, yet *impossible* to express as a measurement. - Juan Fahey

                          Comment


                          • #88
                            Who's in here:


                            Click image for larger version

Name:	hiddenres.jpg
Views:	1
Size:	18.1 KB
ID:	852959
                            Originally posted by Enzo
                            I have a sign in my shop that says, "Never think up reasons not to check something."


                            Comment


                            • #89
                              You fellows are just not going let a man enoy a beer are you?

                              I'll check those things for you

                              Comment


                              • #90
                                You presented a puzzle to a bunch of electronics geeks. What did you expect?

                                Edit: Another thing to check: Are the coupling caps the correct value?
                                "I took a photo of my ohm meter... It didn't help." Enzo 8/20/22

                                Comment

                                Working...
                                X