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  • M3 effect loop

    Hi,

    I am still trying to find a good solution for installing an effects loop into my Hammond M3. It is connected to a Leslie 122 via a 8010-Kit. Before
    I got the Leslie, I used a self-built line out like this ( http://www.dairiki.org/HammondWiki/LineOutFromASpinet ).

    My question: Would it be possible to install that line out again before the 8010-Kit , send the signal to an effects unit, and then send it back into the
    signal which goes to the 8010-Kit?

    Greetings
    Christian
    1958 B3, 1960 M3, 1953 M2 converted into M3, 2x Leslie 122, Ventilator II, Viscount Legend Solo

  • #2
    Yes, but you would need to add an extra amplifier stage after the effects to push the signal back up to proper "Leslie level".
    Current organs: AV, M-3, A-100
    Current Leslies: 22H, 122, 770

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    • #3
      The line out would work on the input side however as enor stated you will need to bump the output back up AND generate a balanced output.

      Jim

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      • #4
        Hmmm....any suggestions how to do that?
        1958 B3, 1960 M3, 1953 M2 converted into M3, 2x Leslie 122, Ventilator II, Viscount Legend Solo

        Comment


        • #5
          There is more than enough gain to drive a Leslie 122 balanced from a mixer.
          At this point,send whatever you like to the 122!
          Add whatever FX you need.

          A small mixer is a great investment,play with phones on and practice away.
          Mix in your MP3's you have to 'accompany' and your 'minus' midi tracks you jam to.
          AND....add FX to your AO29!

          Speaker DI's vary in cost and quality.I use a red Radial!
          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


          • #6
            I spent a few minutes typing out some ideas on how to do what you're asking. But I decided not to post it, because modifying your signal chain the way you are asking is not simple or trivial. I'd much rather not modify a perfectly good 8010 kit, and would rather see something else installed on one manual, such as the Trek II ELB-1A. (This will only apply effects loop to one manual but works nicely.)

            EDIT: One of the reasons Trek II’s effects loop is designed the way it’s designed is that it only deals with low instrument level signals for both its input and output, by tapping in to the organ’s matching transformer. If Trek II were to build something that you are asking for, it would be larger and probably somewhat more expensive due to the need for dummy load resistors, etc. When you’re dealing with organ amp output speaker level signals, you’ve got to either let them go to a place that wants them (I.e. a Leslie) or take many measures to pad the signal, then re-amplify the signal. Not fun and too much room for error, in my opinion.

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            • #7
              Originally posted by Jaim View Post
              The line out would work on the input side however as enor stated you will need to bump the output back up AND generate a balanced output.

              Jim
              No, not if you wish to keep using the Leslie kit. The secondary side of the transformer does send a balanced signal to the Leslie, but will have DC speed switching voltage. Avoid connecting external gear to that line at all costs.

              The signal feeding the primary side of the transformer inside the 8010 kit is single-ended (unbalanced.)

              Whatever you do, keep 2 things in mind:
              -- Make sure the AO-29 amp always has a sufficient load across it.
              -- Don't tamper with the balanced signal that is directly connected to pins 1 and 6 of the Leslie, or tamper with those particular signal paths inside the Leslie kit. DC voltage (80V or so) is going to be present there when speed switch is set to chorale.

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              • #8
                Hmm....that effetcs loop from Trek costs 138$ for one manual....plus shipping costs to germany :-(
                Maybe I just keep it as it is and just add reverb in the mixer.
                1958 B3, 1960 M3, 1953 M2 converted into M3, 2x Leslie 122, Ventilator II, Viscount Legend Solo

                Comment


                • #9
                  I found an fx loop kit for tube amps at

                  https://www.tube-town.net/ttstore/Ba...112::5992.html

                  Would you think this could be inserted into an AO29 like the organ mate? Will it work?
                  1958 B3, 1960 M3, 1953 M2 converted into M3, 2x Leslie 122, Ventilator II, Viscount Legend Solo

                  Comment


                  • #10
                    You can create a Series FX Loop on the AO29 amplifier by splicing into C21 which is off of V4 in the amp.Click image for larger version

Name:	M3 schematic loop tap.png
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                    • #11
                      Originally posted by Stereo_Ron View Post
                      You can create a Series FX Loop on the AO29 amplifier by splicing into C21 which is off of V4 in the amp.[ATTACH=CONFIG]31093[/ATTACH]
                      has anyone tested this?

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