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fender super twin newbie

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  • #1

    fender super twin newbie

    ok, so I received an amp off of a friend of mine whose dad was working on it, but recently died. I was wanting to get it fixed to be able to use. It is the fender super twin non-reverb version. I have 2 wires coming off of the middle 7025 that I can't figure out where it goes. I understand schematics a little bit, but would be considerably easier to follow a wiring diagram instead. I have had no luck in finding one. I can post pictures if that is needed. Just looking for general guidelines/help at least finding where in the schematic it is located. I am located in columbus OH. http://www.thetubestore.com/lib/thet...-Schematic.pdf
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  • #2
    Originally posted by t81rd View Post
    ok, so I received an amp off of a friend of mine whose dad was working on it, but recently died. I was wanting to get it fixed to be able to use. It is the fender super twin non-reverb version. I have 2 wires coming off of the middle 7025 that I can't figure out where it goes. I understand schematics a little bit, but would be considerably easier to follow a wiring diagram instead. I have had no luck in finding one. I can post pictures if that is needed. Just looking for general guidelines/help at least finding where in the schematic it is located. I am located in columbus OH. http://www.thetubestore.com/lib/thet...-Schematic.pdf
    Better get that screw out of there by the power tube socket. Please make sure that's the right schematic. To me it sounds like your describing V2 or V2AB on the schematic.
    Pins 4and5 and pin 9 are your heaters. by the schematic it looks like 1and 6, 2 and 7, 3 and 8 are tied together but the socket doesnt' look like any of that is done like that. Which is why for the verification. And i only see 3 9pin tubes.instead of 5.

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

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    • #3
      Good eye on the screw. I removed it after taking the picture my wife put it there so I wouldn't lose it. To my knowledge that is the schematic but it's hard to find anything on the super twin non reverb

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      • #4
        There are two versions of the non-reverb Super Twin - one uses an inductor in the distortion circuit, the other does not. There are other small differences, but that's the one I remember having to work on mine. I think the inductor one is in Jack Darr's book, and mine was not that. It was close enough to figure out, though.

        The tube layout on these doesn't necessarily follow the usual Fender tube-naming guidelines in the chassis, and as far as I know, there is no "layout diagram" for these. And, paging Bob P... Bob P, can you hear us? I think he's got a good bit of experience with these.

        Justin
        "Wow it's red! That doesn't look like the standard Marshall red. It's more like hooker lipstick/clown nose/poodle pecker red." - Chuck H. -
        "Of course that means playing **LOUD** , best but useless solution to modern sissy snowflake players." - J.M. Fahey -
        "All I ever managed to do with that amp was... kill small rodents within a 50 yard radius of my practice building." - Tone Meister -

        Comment

        • #5
          Originally posted by Justin Thomas View Post
          There are two versions of the non-reverb Super Twin - one uses an inductor in the distortion circuit, the other does not. There are other small differences, but that's the one I remember having to work on mine. I think the inductor one is in Jack Darr's book, and mine was not that. It was close enough to figure out, though.

          The tube layout on these doesn't necessarily follow the usual Fender tube-naming guidelines in the chassis, and as far as I know, there is no "layout diagram" for these. And, paging Bob P... Bob P, can you hear us? I think he's got a good bit of experience with these.

          Justin
          Didn't realize there were 2 versions of this amp. That could explain why nothing matched up. Also thanks for all the quick replies. My friend just wants to get it back running so he can hear it. After that it's mine. So I'm excited to hear it as it will be my first tube amp. I've used solid state my whole life. (Sorry for the back story)

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          • #6
            Originally posted by Justin Thomas View Post
            There are two versions of the non-reverb Super Twin - one uses an inductor in the distortion circuit, the other does not. There are other small differences, but that's the one I remember having to work on mine. I think the inductor one is in Jack Darr's book, and mine was not that. It was close enough to figure out, though.

            The tube layout on these doesn't necessarily follow the usual Fender tube-naming guidelines in the chassis, and as far as I know, there is no "layout diagram" for these. And, paging Bob P... Bob P, can you hear us? I think he's got a good bit of experience with these.

            Justin
            So how many tubes does this amp have? By the schematic I see 11. How about some more pics?
            Be very aware that this amp could KILL you or seriously hurt you if not careful with what you touch.
            Thanks,
            nosaj
            soldering stuff that's broken, breaking stuff that works, Yeah!

            Comment

            • #7
              It does have 11. What I meant was, they don't get numbered right to left from V1 to Vwhatever as in most Fenders, because they don.t follow a straight line. You have to know the schematic to accurately designate the tubes.

              Justin
              "Wow it's red! That doesn't look like the standard Marshall red. It's more like hooker lipstick/clown nose/poodle pecker red." - Chuck H. -
              "Of course that means playing **LOUD** , best but useless solution to modern sissy snowflake players." - J.M. Fahey -
              "All I ever managed to do with that amp was... kill small rodents within a 50 yard radius of my practice building." - Tone Meister -

              Comment

              • #8





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                • #9
                  found the burnt resistors on the 6l6 socket and also 2 burnt caps that I have on order, I just don't want to turn it on and make things worse until I confirm everything with it. I understand that these things could kill me, I have a background in HVAC its just the schematics they use are completely different, but still use caps and the like.

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                  • #10
                    So That looks like pins 1 and 2 on V3, Everyone agreed on that?

                    Is that Electrical tape by one of the 6L6 socket?

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

                    Comment

                    • #11
                      Okay, you're dealing with V3B. The 12AU7 (V2) is for the tone controls and the other 7025 is the input stage. So just find out what pins 1 & 2 of V3B connect to & go for it. It should be within reasonable distance of the ends of the wires...

                      Justin
                      "Wow it's red! That doesn't look like the standard Marshall red. It's more like hooker lipstick/clown nose/poodle pecker red." - Chuck H. -
                      "Of course that means playing **LOUD** , best but useless solution to modern sissy snowflake players." - J.M. Fahey -
                      "All I ever managed to do with that amp was... kill small rodents within a 50 yard radius of my practice building." - Tone Meister -

                      Comment

                      • #12
                        the electrical tape is on a 7025 socket, the red one and the white one clockwise to it (not sure how to find pin numbers) are the ones I have no clue where they go or if they were supposed to go anywhere at all as they look like newer wire. The black marking by the 5th 6L6 from the left was actually burn marks from the burnt resistors. Which I plan on replacing when my caps come in which is no problem.

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                        • #13
                          PS you have the one with the inductor in the distortion. I don't have a schem handy. But it's out there.

                          Justin

                          Edit: unless that black cylinder on the small board is a cap? The part to the right of the orange cap.
                          "Wow it's red! That doesn't look like the standard Marshall red. It's more like hooker lipstick/clown nose/poodle pecker red." - Chuck H. -
                          "Of course that means playing **LOUD** , best but useless solution to modern sissy snowflake players." - J.M. Fahey -
                          "All I ever managed to do with that amp was... kill small rodents within a 50 yard radius of my practice building." - Tone Meister -

                          Comment

                          • #14
                            i think I see where the red wire goes, but the White wire doesn't seem long enough to reach the 33k I do see.
                            But I'd wait for a concurrance.

                            nosaj
                            Click image for larger version Name: twin.jpg Views: 1 Size: 253.7 KB ID: 849203
                            soldering stuff that's broken, breaking stuff that works, Yeah!

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                            • #15
                              The black cylinder next to orange cap has no markings to indicate it being a cap so I feel it's safe to assume it's the inductor

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