Forum Top Banner Ad

Collapse

Ebay Classic organs

Collapse

Announcement

Collapse
No announcement yet.

AO29 - going to Leslie AND 1/4" out at the same time

Collapse
This topic is closed.
X
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • AO29 - going to Leslie AND 1/4" out at the same time

    Hello everyone,
    I've read alot about this but am still wondering. My M100 has no internal speaker, there is a load resistor instead, and the audio signal goes straight to my 147 Leslie, and it sounds great. If I add a 1/4" output according to the simple circuit that can be found on the wiki page, and use it at the same time as the Leslie -let's say, going to an effects pedal-, would this affect the signal that goes to the Leslie? Or should I add some kind of isolation transformer? I guess that's what a D.I. box would do, but the isolated output would be XLR. Thanks for any advice.
    Last edited by bourniplus; 05-24-2019, 08:07 PM.
    A100, X77, M3, M100, E100
    Leslie 147, 145, homemade road Leslie
    My youtube channel

  • #2
    Shouldn't affect anything. I use the attached for a line out.

    Jim Click image for larger version

Name:	m3-line-out.gif
Views:	198
Size:	5.0 KB
ID:	657296

    Comment


    • #3
      Along with the relay/power supply 12V switching for my 115V AC Leslie 147 speed control system,I can simultaneously switch the Neo Vent.
      One switch for both.This includes slow/stop/fast on both.
      M100 can do both 147 and line out.No worries, consolidate your motor switching too! If that effect happens to be a Leslie sim.....
      A100/251 A100/147 A102/222 B2/142 BV/147 BCV/145 M3/145 M102/145 M111/770 L101/760 T222/HL722 M111/770 no B3/C3!

      Comment


      • #4
        Something to keep in mind on a M3 is that the speaker winding of the output transformer has a grounded center tap which makes the black and green wires a ‘balanced' line. I suggest that the sleeve terminal of your line out jack and bottom leg of your level pot should return to chassis ground instead of the black wire. This might prevent conflicts with other external gear. I wasted a couple of hours troubleshooting my ao29 because of low output. I had installed shiny new 3-wire line cords on the M3 and E100 and both organs connect to my 720. I had forgotten about the center taps and the new ‘ground' connections effectively were shorting half the transformer secondary, substantially reducing output 8)
        Tom in Tulsa

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

        Comment


        • #5
          I was thinking of using the lineout to go to a reverb pedal, instead of using the reverb unit I've built from the M100's parts. I couldn't help but think that the organ's output, the Leslie and the pedal would then form a new circuit, different from only organ/Leslie. I'm not concerned about speed switching for the moment, just the audio.
          A100, X77, M3, M100, E100
          Leslie 147, 145, homemade road Leslie
          My youtube channel

          Comment


          • #6
            Would you be disconnecting the Leslie's audio input from the organ and moving it to the output of the reverb pedal? I don't see why that shouldn't work. Am I assuming correctly that the pedal allows you to control how much reverb is added, etc?
            Tom in Tulsa

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

            Comment


            • #7
              No, the Leslie would still be connected to the organ. The idea is to have a wet, non-leslied reverb signal that I would send to its own P.A. channel.
              A100, X77, M3, M100, E100
              Leslie 147, 145, homemade road Leslie
              My youtube channel

              Comment


              • #8
                Ok then, the Leslie and line out jack should should work perfectly fine together.
                Tom in Tulsa

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

                Comment


                • #9
                  Originally posted by tpappano View Post
                  Something to keep in mind on a M3 is that the speaker winding of the output transformer has a grounded center tap which makes the black and green wires a ‘balanced' line. 8)
                  This only applies to early AO29's with a field coil speaker. The later models have a single ended transformer with one leg connected to ground.

                  I don't think I've ever worked on an early AO29, I know the OPT's are different. Thanks for the heads up.

                  Jim

                  Comment


                  • #10
                    Indeed, you are correct. I flipped through the schematics to check for taps on the different versions, I flipped a little to quickly 8)
                    Tom in Tulsa

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

                    Comment


                    • #11
                      So I made a line-out using the circuit in post #2. Instead of the pot, I used a resistor. Even with a 220 ohms resistor I still have a bit of distortion and a pretty hot signal that needs to be padded on my mixer. Should I experiment with other values for the other components as well?
                      A100, X77, M3, M100, E100
                      Leslie 147, 145, homemade road Leslie
                      My youtube channel

                      Comment

                      Working...
                      X