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Leslie 720 amplifier module, anyone have one of these lying about?

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  • Leslie 720 amplifier module, anyone have one of these lying about?

    From the Great Leslie Fire of 2018:

    Click image for larger version

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    Last item I need to bring the last of the 720 and 540 speakers back to their full potential. I don't think this one is repairable 8)

    I think these modules are used in several different Leslie models.

    Thanks!
    Tom in Tulsa

    Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

  • #2
    Oops !
    Nice pic for the Horror museum of Organforum.

    Some resistor and capacitors disappeared in smoke.
    But the transformer is still there and may be intact under the soot.
    I think it is repairable if there is not other issue.

    But, you can replace it with a chinese LM3886T amp based module. (The same are mounted on the JBL EON Power 10)

    Or even throw everything and mount this one.
    https://www.xkitz.com/products/bi-am...ssover-xamp-m4

    JP

    Comment


    • #3
      Yep, this is what happened when the amp developed a 'fault' (from lightning) and the *30 amp* fuse someone replaced the 2.5 amp with just let all kinds of electrons have a real party 8) The transformer is pretty much just a blob of ash and the pcb underneath is carbonized clear through.

      That little bi-amp module looks real cute and would run fine with the existing Leslie power supply, but on the other hand I have an extra Crown CT-200 that would really do the job. Decisions, decisions...
      Tom in Tulsa

      Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

      Comment


      • #4
        The 720 and 705 amps are same and the 710 possibly very similar.

        Comment


        • #5
          Yep, got an extra.

          Best!

          DD
          Leslie 31H Type 2 x2, 45 x2, 251, 351, 720, 710 x3, 700, 2101, 925, 860, 700, 330, 120 x2, 104, 25, 125 x2
          Hammond Concorde 2312M, Hammond Elegante 304100, Hammond A-100, Hammond C2
          Nord Electro 4D & 5D, Kawai MP6, Ensoniq ESQ &Mirage, Wurlitzer Electric Piano 200
          Lowry GAK25 & GAK
          Farfisa Combo Compact

          Comment


          • #6
            Awesome, sending you a PM, or at least I think I am.
            Happy New Year!
            Tom in Tulsa

            Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

            Comment


            • #7
              I think I have a few as well
              Hammond C3, M102, XB3, XB5, X5
              Lowrey Heritage DSO-1, H25-3, Yamaha E70
              Farfisa Compact Duo Mk2, Vox Continental 300, Korg BX3 Mk1, Leslie 122, 145, 910, 415
              www.drawbardave.co.uk

              Comment


              • #8
                Neat! I have two Leslie 540 speakers, once they are both working I have to figure out what to do with them 8) Happy New Year!
                Tom in Tulsa

                Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

                Comment


                • #9
                  There are a few owners of 720s on here who could do with the 540 on top to complete the combo.
                  It's not what you play. It's not how you play. It's the fact that you're playing that counts.

                  New website now live - www.andrew-gilbert.com

                  Current instruments: Roland Atelier AT900 Platinum Edition, Yamaha Genos, Yamaha PSR-S970, Kawai K1m
                  Retired Organs: Lots! Kawai SR6 x 2, Hammond L122, T402, T500 x 2, X5. Conn Martinique and 652. Gulbransen 2102 Pacemaker. Kimball Temptation.
                  Retired Leslies, 147, 145 x 2, 760 x 2, 710, 415 x 2.
                  Retired synths: Korg 700, Roland SH1000, Jen Superstringer, Kawai S100F, Kawai S100P, Kawai K1

                  Comment


                  • #10
                    Thanks, Andy! Maybe they can find new homes, then. Happy New Year!
                    Tom in Tulsa

                    Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

                    Comment


                    • #11
                      Hi Brother
                      Do you still have the Leslie 540 speakers you want to get rid of I will take them both or 1 how much? Where are you located I live in Queen Creek Arizona. Do you have the 11 pin connector also? Happy new year.

                      Comment


                      • #12
                        Hi, I’m in Tulsa Oklahoma. Yes, I do have two 540s that sustained ‘interesting’ damage from a lightning strike. After some repairs they are functional, but one needs the aforementioned amp module. The original drivers were shot so I replaced them with new Pioneer full range drivers. These do have the 11 pin interface. Do you ever come this way? Shipping would probably be interesting, these thing are fairly heavy 8)
                        Tom in Tulsa

                        Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

                        Comment


                        • #13
                          Originally posted by tpappano View Post
                          Hi, I’m in Tulsa Oklahoma. Yes, I do have two 540s that sustained ‘interesting’ damage from a lightning strike. After some repairs they are functional, but one needs the aforementioned amp module. The original drivers were shot so I replaced them with new Pioneer full range drivers. These do have the 11 pin interface. Do you ever come this way? Shipping would probably be interesting, these thing are fairly heavy 8)
                          No I would not be near Tulsa Oklahoma at all. about how much are you asking for the 2 Leslie 540s with the 11 pin connectors cable plus shipping?

                          Comment


                          • #14
                            Let me get back with you, I think they could probably be shipped UPS in good double strength boxes.
                            Tom in Tulsa

                            Fooling with: 1969 E100, 1955 M3, 1963 M100, Leslie 720

                            Comment


                            • #15
                              If you need parts, let me know. Mine had problems on the power supply board, so I have an as-is amp that's been partially parted out

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