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  • Trek 2 percussion

    I guess I need some one to hold my hand through this install; I have no idea what is 'the zero bus of the preset recorder panel (ground)'. I know the screws are marked in rows up and down and across. I just need to know which screw it is. Removing "#s 4 (green), 5(violet), 7 (grey) wires from the upper manual B group draw bars" I don't know what 'B group' is. How can I tell if I have a Swell capacitor or a rheostat box? Is the rheostat box the box on the amp the volume pedal levers to? Can I get some assistance?

  • #2
    Re: Trek 2 percusiion



    Hi Doug</p>

    On the preset panels, looking at the rear of the organ, the ground is the right-most screw on each preset strip.</p>

    Good luck</p>

    Dave</p>

    Comment


    • #3
      Re: Trek 2 percussion

      Well thank you very much! That's not what I thought at all! That's why I asked!

      Comment


      • #4
        Re: Trek 2 percusiion



        [quote user="tonewheel1966"]On the preset panels, looking at the rear of the organ, the ground is the right-most screw on each preset strip.[/quote]</P>


        I am confused bythis response. On most Hammond organs, the preset bars run horizontally, with the topmost bar (labeled 8) representing the most intense sound (ie 8 on the drawbar) and the bottommost bar (labeled 0) being no sound (ie the drawbar all the way in). This being the case, the bottommost (0) bar is grounded.</P>
        1937 Model E
        PR-40 w/Accutronic Reverberation
        Leslie 31-H
        Schulmerich ChimeATron

        Comment


        • #5
          Re: Trek 2 percusiion



          [quote user="dna9656"]I guess I need some one to hold my hand through this install; I have no idea what is 'the zero bus of the preset recorder panel (ground)'. I know the screws are marked in rows up and down and across. I just need to know which screw it is. Removing "#s 4 (green), 5(violet), 7 (grey) wires from the upper manual B group draw bars" I don't know what 'B group' is. How can I tell if I have a Swell capacitor or a rheostat box? Is the rheostat box the box on the amp the volume pedal levers to? Can I get some assistance?[/quote]</p>

          The zero bus of the preset panel is the lowest bar. You can connect to any point of the lowest bar.</p>

          The "B" group is the second set of drawbars from the right (looking in the back of the organ) Connecting there will give you percussion when the upper manual "B" preset is down. Actually, you can put it on ant set of drawbars, that's just the traditional location. You will remove those three wires from the drawbars, connect those wires to the matching color wires in the perc kit, and solder three new wires to the three drawbarsthat you removed wires from.
          </p>

          You have a swell capacitor on a C-2. Yes, it's the box on the preamp the volume lever is connected to.</p>

          The Trek II instructions are well done. Just take your time. I think mounting the control head and running the wires under the drawbar base is the hardest part of the installation.</p>

          Good luck!</p>

          Geo
          </p>

          Comment


          • #6
            Re: Trek 2 percussion



            So the preset panel is made up of strips of metal called 'BARS'. They run horizontally.</P>


            All thosescrews we see are in a 'BAR', there are several BARS; the zero bar is closest to the shelf the TG and amp set upon, this bar is electrically grounded. The black wire can be connected to any location (terminal) on this bar.</P>


            The trek 2 instructions show C-2s can have either Rheostat or aSwellcapacitor; you say I have a rheostat; so that is the box on top of the amp the pedal is hooked to?</P>


            How do I determine the location of wires commin form the B set of draw bars? Trace them out? I have "upper maunal" and 'lower manual' markers on the preset panel; so i know the B set of drawbars is on the "upper' maunal" preset panel. So I trace out the B set from the second from right (from the back) set of draw bars....</P>


            On the upper manual preset pane,lower mostright corner are 3 black wires; are these ground?</P>


            Just so I understand, please confirm the above.</P>


            I'm being a PITA because I have (I thought) followed instructions before and had to buy burned/broken parts so I am being especially cautious as money is tight and parts do not grow on trees.</P>


            Mounting the control head was easy for me; more time consuming but easy; the instructions did not assume any pre-knowledge on that point.</P>


            I think Trek 2 should include a drawing of the preset panel highlighting the terminals concerned based on the factory setup of the preset panel as the 'B' group of drawbars as well.</P>


            I'm still learning how to play the organ and about Hammonds in general. I have beena guitar player since 1971, I watched my parents play organs and pianos but never learned anything about them</P>
            <P mce_keep="true"></P>

            Comment


            • #7
              Re: Trek 2 percusiion

              [quote user="dna9656"]

              So the preset panel is made up of strips of metal called 'BARS'. They run horizontally.</p>


              All thosescrews we see are in a 'BAR', there are several BARS; the zero bar is closest to the shelf the TG and amp set upon, this bar is electrically grounded. The black wire can be connected to any location (terminal) on this bar.[/quote]</p>

              Yes.</p>

              </p>


              The trek 2 instructions show C-2s can have either Rheostat or aSwellcapacitor; you say I have a rheostat; so that is the box on top of the amp the pedal is hooked to?
              </p>

              All C-2's have the swell capacitor. The rheostat was associated with earlier models like the CV/BV, D, A, AB etc. The swell control is located on the preamp while the rheostat would be a seperate chassis altogether.
              </p>


              Just so I understand, please confirm the above.</p>


              I'm being a PITA because I have (I thought) followed instructions before and had to buy burned/broken parts so I am being especially cautious as money is tight and parts do not grow on trees.</p>


              Mounting the control head was easy for me; more time consuming but easy; the instructions did not assume any pre-knowledge on that point.</p>


              I think Trek 2 should include a drawing of the preset panel highlighting the terminals concerned based on the factory setup of the preset panel as the 'B' group of drawbars as well.
              </p>

              Typically Trek II products are sold to "dealers" which are usually service shops. Technicians are familiar with the terms and descriptions depicted in their instructions.
              </p>


              I'm still learning how to play the organ and about Hammonds in general. I have beena guitar player since 1971, I watched my parents play organs and pianos but never learned anything about them</p>
              <p mce_keep="true"></p>
              </p>

              Sounds great!</p>

              Geoelectro
              </p>

              </p>

              Comment


              • #8
                Re: Trek 2 percussion

                If the Swell Capacitor is like the capacitor on an M-3 I have a Rheostat. I have a Can of sorts up on the right side as seen from the back; it's the matching transformer. It looks just like the one hooked up to the tablet bar I bought. I have a box on top of my AO-10, inside this box are 3 wires, 2 geen and one yellow. Nothing (meaning all three) go to ground. The Trek 2 instructions say connect the shielded wire to the wire inside the rheostat box that is NOT grounded; well I can;t find on that IS grounded. How now Brown Cow?

                Comment


                • #9
                  Re: Trek 2 percussion



                  Double post how'd i do that?</P>

                  Comment


                  • #10
                    Re: Trek 2 percusiion



                    No C-2 has a rheostat, they all have swell capacitors, so the instructions for the rheostat models (C &amp; CV) do not apply.</P>


                    Please trace the mechanical linkage from the swell pedal - the vertical rod from the swell pedal should connect to an arm sticking out of a square box on top of the preamplifier. That arm should also have a balancing spring attached to it.If that is not the case with yours, you don't have a standard C-2. Let us know.</P>
                    1937 Model E
                    PR-40 w/Accutronic Reverberation
                    Leslie 31-H
                    Schulmerich ChimeATron

                    Comment


                    • #11
                      Re: Trek 2 percussion

                      Yes I have the arm from the pedal to the box on the AO-10 preamp. I took the cover off and found 2 green wires and1 yellow wire thatnone ofcan be traced immediately to ground. I looked at the schematic and cannot find a swell capacitor; only the line drawing of the amp. I can't see a wire from the matching X-former to the rheostat either.

                      Comment


                      • #12
                        Re: Trek 2 percusiion



                        The C-2 has <U>no</U> rheostat and has <U>two</U> matching transformers, one for each manual. From the matching transformers, wires go directly to the Vibrato On/Off tablets - yellow for lower manual, green for upper. These are the signal wires. From the Vibrato tablets, wires go directly to the preamplifier input terminals under the cover - yellow for No Vibrato, green for Vibrato. These inputs are shown to the extreme left on the AO-10 schematic, andare indicated thereto come from the Vibrato &amp; No Vibrato tablets.To add some confusion, the two wires from the preamplifier to the Volume tablet next to the Vibrato tablets are also yellow and green.</P>


                        On the AO-10 schematic, the swell capacitor is labeled "Expression Control" and is a three plate capacitor (the plates are shown curved). One plate is connected to C16 which brings the signal from one half of V4. One plate is connected to ground through R99. There is also an R/C network between these two plates. The third plate (the one that rotates via the expression pedal linkage) is connected to pin 3 of V4 and also to the feedback and phono input capacitors.</P>
                        1937 Model E
                        PR-40 w/Accutronic Reverberation
                        Leslie 31-H
                        Schulmerich ChimeATron

                        Comment


                        • #13
                          Re: Trek 2 percusiion

                          Thanks for setting me straight!

                          Comment

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