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Rodgers 760 audio cables

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  • Rodgers 760 audio cables



    The plugs for the cables that go out from each channel to the amp look like the same kind used for MIDI. Can I make these myself? Are all 5 pins used? or is it wired like MIDI with only 3 pins. Could I use XLR cable, or do I need 5 conductors? Can I use off the shelf MIDI cable?
    </p>




    Also what is the proper way to remove the speaker cable from the jacks? Those little white tabs come off one way. I tried gently pushing the other way but it didn't budge. I didn't want to break them so I'm using caution and asking here.</p>

    </p>

    Here's a picture:</p>

    http://i22.photobucket.com/albums/b3...0/IMG_6642.jpg</p>

    </p>

    </p>

  • #2
    Re: Rodgers 760 audio cables



    Q,</P>


    To remove the speaker wires, just push down rather hard on the free end of the white thing. They are hard to push and a little flimsy too. Yes, they could break. But if you take a close look at the Zimbel pair, which are unused in your organ, you'll see the little jaws inside open when you press on the free end of the lever. While holding that thing down you can tug the speaker wire out of the hole.</P>


    If you can't get them out, just cut them off with diagonal pliers. I believe the church reports that the internal amplifier is no good, right? So you won't be using these speaker outputs in your installation.</P>


    The output connectors are the same as MIDI connectors, but I don't know if you can use off the shelf MIDI cables. Probably so. Won't hurt to try. Be aware that allfour of thepins are used in this organ.Each plug has the audio signal on one pin, the audio ground on another, then two pins carry the + and - voltage that drives the relay for turning on the external amplifier.</P>


    Looking at the schematic, it appears that the audio signal is pin 1 and audio ground is the pin right next to it, which for some reason is called pin "4" . . . The + voltage for driving the amp relay is pin "3" which is not actually the third pin, but the last one, opposite pin 1. The - or ground for the relay is pin 5, which is the one next to pin 3. Pin 2, the middle one, is not used.</P>


    Is that thoroughly confusing? I think so too. You may have to get aqualified Rodgers tech to hook up your external amps. But, if you can find some actual Rodgers S-102 amplifiers on ebay (not S-100 or S-101, as they use the old-style input connector), you can do it yourself with an ordinary MIDI or computer keyboard cable.</P>


    Hope that helps a little.</P>


    John</P>
    John
    ----------
    *** Please post your questions about technical service or repair matters ON THE FORUM. Do not send your questions to me or another member by private message. Information shared is for the benefit of the entire organ community, but other folks will not be helped by information we exchange in private messages!

    https://www.facebook.com/pages/Birds...97551893588434

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    • #3
      Re: Rodgers 760 audio cables



      Thanks John. I'll try with the MIDI cables in a few days, when I get a chance to go buy some. I searched for standard MIDI wiring diagrams, and I see the confusion with how pins are numbered.
      </p>


      As of now I've got Channel 1, 2, 3, pedal, and antiphonal hooked up to speakers. The internal amps do seem to be working. There is an additional S-102 inside the console, it was hooked up to the antiphonal channel and that's what I have it doing currently. The volume for antiphonal is relatively less than what the other channels are putting out.
      </p>

      Check my original thread, I've posted some pics of additional stuff that came with the organ. </p>

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      • #4
        Re: Rodgers 760 audio cables

        If standard MIDI cables result in noise pickup, then you will have to make your own involving shielded twisted pairs for the audio connections. Twisted pair reduce magnetic noise pickup drastically. The overall shield reduces electrostatic pickup.

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