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1/4 Line Out on M2

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  • 1/4 Line Out on M2



    Hi Guys,

    Spent a good amount of time searching before I posted...can somebody point me in the right direction? If this has already been posted I apologize. I'm new to organs, and new to electronics. I'd like to install a line-out on my m2. I see tons of discussions for doing this on a M3 and M. Can I follow the same instructions that have been posted for an m3?</p>

    http://www.wikihow.com/Install-a-Lin...Electric-Organ OR

    http://www.dairiki.org/HammondWiki/LineOutFromASpinet</p>

    The latter link seems to make the most since to me since the schematic calls for a resistor. I plan on disconnecting the speaker and don't want to damage the Hammond tubes.</p>


    Thanks guys!

    </p>


    </p>

  • #2
    Re: 1/4 Line Out on M2

    That will work and gives you good control. If you disconnect the speaker but sure to put a 8 ohm, 10 watt resister in it's place.
    Hammonds: A; AB; B3; D; E; 6-M3's; 2-A100; T582C.
    Leslies: 3-31H; 21H, 22H, 4-44W; 46W; 25; 47; 45; 125; 50C; 51; 55C; 2-120; 122; 122A; 145; 147; 245; 770; 825; 2-102; 2-103; 300.
    Wicks 2/5 pipe organ; Yamaha upright; Kurzweil Micro Piano & Micro B with M-Audio Oxygen 61; Yamaha DGX520; Wurlitzer 4100 (it came with a Leslie!). Peavey KB100 keyboard amp. Peavey Bass Guitar. Yes, I have A. D. (acquisition disorder) and don't want it cured.

    Comment


    • #3
      Re: 1/4 Line Out on M2



      Someone in anotherforum recommended this</P>


      http://pro-audio.musiciansfriend.com/product/ART-Tube-MP-Studio-Mic-Preamp?sku=180581</P>


      It works as a DI box. Bought one myself because of the low price but did not have the time to hook it up. Download the manual and check it out.</P>
      <P mce_keep="true"></P>
      <P mce_keep="true"></P>

      Comment


      • #4
        Re: 1/4 Line Out on M2



        One clarification - when we say disconnect the speaker, we mean disconnect the speaker voice coil and replace it with an 8 ohm, 10 watt (or greater) resistor, and take the signal from across that resistor.</P>


        The M-2 has what is called around here a "field coil" speaker, which means it was a wound field rather than a permanent magnet to provide the magnetic field required to make the speaker work. The field coil is connectedin the amplifier's power supply, and is required for the amplifier to operate correctly. Normally, you'd disconnect the voice coil and leave the field coil alone. If for some reason you insist on removing the entire speaker, in addition to the voice coil resistor, you will need to replace the field coil with a 700 ohm, 20-watt resistor.</P>
        1937 Model E
        PR-40 w/Accutronic Reverberation
        Leslie 31-H
        Schulmerich ChimeATron

        Comment


        • #5
          Re: 1/4 Line Out on M2



          Hi guys,</P>


          Thanks so much for the responses. Just to clarify and make sure I',m on the same page...</P>
          <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">1. What I want to do is run a 1/4 line out to a Peavy Keyboard combo amp, or to the house sound board. I'm trying to figure out if the signal coming out is safe to input into a powered amplifier?</FONT></FONT></P>
          <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></FONT></P>
          <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman">2. In the second diagram (the one i presume we are saying is the right one to use?), there is a potentiometer. So this design would have a knob to control the output level? </FONT></FONT></P>
          <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT size=3><FONT face="Times New Roman"><o:p></o:p></FONT></FONT></P>
          <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>3. I'm a little confused on the speaker hookup. Ideally I'dlike to leave the speaker attached and just have a line out that would either operate in tandem with the speaker, or in place of it via a switch, or perhaps just by plugging a chord into the 1/4 jack. In the second diagram the speaker is still connected and making sound and working in tandem with the 1/4 out jack is this correct? sound will be coming out of the speaker and out of our amplifier?</FONT></P>
          <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3></FONT></P>
          <P class=MsoNormal style="MARGIN: 0in 0in 0pt"><FONT face="Times New Roman" size=3>Thank you guys so much! I'll be sure to post information when I actually install this for future members to reference....</FONT></P>


          G</P>

          Comment


          • #6
            Re: 1/4 Line Out on M2



            1. The signal is rather "hot" and as-is may severly overload the input circuits of an amplifier.</P>


            2. Correct. Do not use the first diagram which, when I pulled it up, had a warning on top as to its questionable authority. The potentiometer is in the circuit so you can adjust the output level to one that your amplifier is comfortable with, fixing (1).</P>


            3. The diagram indicates <U>either </U>a resistor or a speaker. With the resistor in place, the speaker would be silent. In one of the leads to the speaker/resistor, you could insert a single-pole, double-throw switch so that you could select between the resistor and the speaker.</P>
            1937 Model E
            PR-40 w/Accutronic Reverberation
            Leslie 31-H
            Schulmerich ChimeATron

            Comment


            • #7
              Re: 1/4 Line Out on M2



              Can anyone explain exactly how to wire one of these? I have the schematic but with my limited electrical knowledge I can't for the life of me figure out where exactly to pickup the signal from. </p>

              1) Do you go off of the speaker terminals or cut the wires before they reach the speaker?</p>

              2) What lugs on the pot are used for which? </p>

              3) If I wanted to wire in a SPDT switch to select between a resistor and the speaker how would that be wired in?</p>

              4) Has anyone ever come across a wiring diagram for this circuit or any other helpful step by step sort of instructions?</p>

               </p>

              Thanks! </p>

               </p>

               </p>

              Comment


              • #8
                Re: 1/4 Line Out on M2



                If you are referring to the Wiki schematic, and an M-2:</P>


                1) If the speaker is to be left in place and not substituted by a resistor, the best place to start is the Voice Coil terminals on the amplifier. Black and green wires going to the speaker should be the only things connected to those terminals. The 1k resistor is connected to the terminal with the green wire, the jack and common lug of the potentiometer to the terminal with the black wire.</P>


                2) The lead to the jack goes to the center lug on the potentiometer. The black wire goes to the right hand lug when the shaft of the potentiometer is pointing at you; the 10mF capacitor goes to the left hand lug.</P>


                3) The green wire to the speaker would be removed from the Voice Coil terminal on the amplifier and connected to one of the outer lugs on the SPDT switch. A wire from the common (center) lug on the switch would go to the amplifier terminal just vacated by the green wire to the speaker. The 1k resistor from 1) remains on the terminal also. One side of the8ohm, 10 watt resistor would go to the remaining lug on the switch, the other side of the resistor would go to the Voice Coil terminal on the amplifier also occupied by the black wire to the speaker and the wire to the potentiometer and jack from 1).</P>


                4) I haven't seen one. If the above isn't clear to you, you might want to seek help in getting startedfrom someone who has a little familiarity with elecronic circuits.</P>
                1937 Model E
                PR-40 w/Accutronic Reverberation
                Leslie 31-H
                Schulmerich ChimeATron

                Comment


                • #9
                  Re: 1/4 Line Out on M2



                  Model E, Thank you for your reply. This is good info and it was a big help. I took another crack at figuring out this wiring and I think that I got it now. </p>

                  I was actually trying to install the Wiki spinet line out schematic with the addition of a switchable speaker on my M-100. </p>

                  With the help I got here, I was able to get this working. </p>

                  I wired the components up in a small project box so that I can mount this on the back of the organ under the tone generator shelf. I didn't want to cut any wires on the organ in case I decided to put it back to stock so I just disconnected the leads from the speaker terminals and bought some new speaker connectors to solder on to my new wiring. </p>

                  Since I had such a hard time visualizing the wiring for this, I went ahead and put together a wiring diagram of my own in the spirit of sharing information for others who might be interested in doing this mod. Again, I am not especially skilled when it comes to electronics and wiring so I would like to seek the knowledge of those who know more. If anyone has to the time to look over this wiring diagram and let me know if everything looks OK, I would appreciate it. I tried it out and everything seems to work great but just because the amp isn't blowing up doesn't mean that I am not putting a strain on it.</p>

                  Also, I am curious if there is a suitable place to upload this diagram to share with others. It seems the Organ Forum does not allow you to upload or embed images.</p>

                  Here is the link:</p>

                  Spinet_Line_Out_wir.png</p>

                  Thanks!! </p>

                  Comment


                  • #10
                    Re: 1/4 Line Out on M2



                    You claim to be "not especially skilled when it comes to electronics and wiring" but you sure do nice wiring diagrams. Sounds like your wiring was done as nicely as the diagram.</P>


                    You've gotthe circuit down perfectly. Hope you enjoy the organ - they can be a lot of fun.</P>


                    Sorry I can't help with the posting, but anyone who does a forum search for "Line Out" will find it.</P>
                    1937 Model E
                    PR-40 w/Accutronic Reverberation
                    Leslie 31-H
                    Schulmerich ChimeATron

                    Comment


                    • #11
                      Re: 1/4 Line Out on M2



                      Thanks for the kind words about the wiring diagram. I wanted to to do a good one as a reference for others around here. I have received much good advice and assistance with my M-100 around here and wanted to "pay it forward". </p>

                      It seems I spoke too soon however something is not quite right with my line out. </p>

                      It does work as a line out but I noticed that with it connected I am experiencing some strange interactions with the internal speakers and reverb amp. </p>

                      With the speakers switched on the internal speakers sound at normal volume but the reverb amp level is very low. With the speakers switched off the reverb sounds at normal volume and I am still getting some sound out of the main speakers. </p>

                      Any ideas? </p>

                      Comment


                      • #12
                        Why not use the diagram in the service manual?



                        Just out of curiosity, why do folks seem to prefer the diagram from the Hammond wiki to the diagram from the M series service manual (page 19)? It appears to me that the one from the service manual is superior, at least insofar as it includes reverb in the output.</p>

                        </p>

                        Comment


                        • #13
                          Re: 1/4 Line Out on M2



                          You might not have got the switch in exactly the right place in the circuit. My original response was for an M-2 (the topic of this thread) which has only a single speaker. </P>


                          With the M-100, the amplifier supplies two main speakers and the reverberation amplifier. According to the schematic, the terminal I am guessing that you removed from the speaker to wire the switch into should have had three wires connected to it. These wires would go to the amplifier, to the other main speaker, and to the reverberation amplifier. If that is the case, you are only switching the main speaker.</P>


                          I suggest putting the speaker wiring back to the original. Then find which of the wires from the main speaker goes back to the amplifier and cut it. Connect the end from the amplifier to the center of the SPDT switch, and the end from the speaker to the remaining freeterminalon the SPDT switch. That will ensure that the switch controls all the speakers and the reverberation. If you want to return the organ to its original state, uou will have only one wire to splice back together.</P>


                          amphigory: Perhaps we don't all have access to the M- Service Manual?</P>
                          1937 Model E
                          PR-40 w/Accutronic Reverberation
                          Leslie 31-H
                          Schulmerich ChimeATron

                          Comment

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