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Thread: Line IN to Hammond L100

  1. #1
    p Piano alandlees's Avatar
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    Line IN to Hammond L100

    Hi Iíve searched for an answer to this and just canít find it, so hoping someone can help me?

    Iím trying to use a drum machine with an L100. According to the service manual, the correct way to run an external source into an L series is to insert a Y splitter into the WH terminal and use that as a line in. However, the organ and the line in will not play together, only individually.

    Does anyone know where I could place a line in to use both together, as is required for a drum machine?

  2. #2
    pp Pianissimo theseacowexists's Avatar
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    Does your L have the RCA phono plug on the expression pedal housing? I know the M series has them and they are meant for a line in, I don't see why that wouldn't work on your L if it has it.
    Hammond M-3, Hammond M-101, Hammond T-211, Hohner Cembalet N, Hohner Favor Combo, Hohner Pianet L, Hohner Pianet T, Hohner Symphonic 30N, Leslie 130, Nord Electro 3, and an entire village of guitars and harmonicas.

  3. #3
    p Piano alandlees's Avatar
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    Iím afraid not, thereís no RCA input on the expression housing. The service manual states the method I mentioned so I guess this must be the only option.

  4. #4
    pp Pianissimo tpappano's Avatar
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    I think what could be happening here is that when you connect your rhythm box with the simple "Y" adapter the rhythm box is in effect shorting the organ tones to ground. The 'white' jack is part of a "high" impedance circuit and I'm guessing that your box has a relatively "low" impedance output. I'll bet you hear the drum sounds fine but the organ sounds very low or not at all. Something to try is converting your rhythm box to a higher impedance source by splicing a 100,000 ohm resistor into the center conductor of the shielded cable from the box before it goes into the Y adapter. (or hack into the Y adapter cable itself) If you can now hear both sounds, you have fixed it or at least moved in the right direction. You may need to try different resistor values to find what works best.

  5. #5
    mp Mezzo-Piano PGR's Avatar
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    1 members found this post helpful.
    I did that with my L100 but having trouble remembering just how I did that . I think the slitter allows for a separate source .but interferes with the original source ..like one or the other but not both? Even though it says you need your own volume control because the volume controls for the organ do not effect the input of the new.

    I mounted my beat box on the left side by removing the block. then I supplied power ac to it from the organ by splitting it off the main power supply. Then I ran the out put I think to the peddle filter on the back wall and a good ground for the other side - using the TWG generator ground. Basically Hot wired the signal into the system - I don't think I had to put resisters in place but be prepared This worked like a charm. My L100 is under the steps right now so I can't get to it
    Practise the theory...realize the practical
    Hammonds L100 /A100 /B3 Leslie 147 and 122 Yamaha E352 Key board driven in OVATIONS 15" 40 watt power

  6. #6
    p Piano alandlees's Avatar
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    Thanks yes I think you are right, I will give that a try thank you. I found another place on the schematic where the rhythm 2 drawer is wired into the system also so I may try that. Failing that I will try the resistor idea as I remember the same issue on my T200, although that didnít kill the organ volume quite as much! Many thanks, Alan

  7. #7
    fff Fortississimo enor's Avatar
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    1 members found this post helpful.
    Use a small mixer to combine the signals into the WH terminal. Problem solved.
    Current organs: AV, BC, A-100
    Current Leslies: 22H, 142, 147, 760
    Organs in the past: L-100 (several), M-100 (x2), T-100, E-100, CV
    Other keyboards: Roland FP-4, Yamaha DX7, Yamaha TX81Z, Yamaha Motif ES Rack, Korg Krome, Novation Mininova

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