Hammond X-66 direct into PA

Discussion in 'rec.audio.pro' started by Charles A. Peavey, Aug 19, 2003.

  1. Greetings:

    Anyone here have any experience in going direct into a PA system with a
    Hammond X-66: there are three output voltages which vary from 0.35 volts to
    40 volts. Thanks.

    regards,
    Charles
  2. David Smith

    David Smith Guest

    Hi Charles,

    Use a passive direct box, very important. A good quality one with a real
    transformer inside. Radial JDI, Countryman, and BSS are top shelf models.
    DOD makes an indestructible model 265 that sounds just ok for around $50.00.

    As far as the voltage thing...
    Best to take it to a service department, but if you want to DIY...

    Line level is considered to be around one volt, or one volt equals "zero" on
    the VU meters. The actual voltage is closer to .775 volts.

    So the 0.35 voltage would be spot on for feeding electronic equipment. A
    direct box inserted here would isolate the PA from ground loops and balance
    the signal at mic level for input into a mixing console's "mic" input. I'm
    assuming the stage and FOH mixer are connected by a [100'] mic snake. Even
    if its not, use a direct box to go into the mixers "mic" input. You can
    just go into the "line" input of the mixer if its set up close to the organ
    and is powered from the same AC circuit.

    To input into a mixers mic input [XLR connector]:
    Tap the output voltage at 0.35. Mount a 1/4" female phono jack on the X-66.
    Use a 1/4" phono patch cable to connect the X-66 to a direct box. Use a XLR
    cable to connect the
    direct box to the mixing console mic input. Best way to do it.

    To input into a mixers line input [1/4" phono]:
    Tap the output voltage at 0.35. Mount a 1/4" female phono jack on the X-66.
    Use a 1/4" phono patch cable to connect the X-66 to the mixing console line
    input. Higher potential for ground loop hum, 20ft. max cable length, less
    powerful preamp than mic input.

    I trust you will get a second opinion on this. From time to time, I have
    had to modify church organs to get a line level output to feed a PA. I've
    done it by tapping the headphone output pre-amplifier. I built in a high
    quality transformer from Lundale [around $80.00 alone] and mounted it to an
    aluminum plate. Also in the plate, I mounted an XLR connector. This is a
    "built-in direct box". A little more streamlined to install, but a lot of
    work. It's cheaper and faster to just mount a 1/4" connector and use an
    direct box on the floor.

    The 40 volt thing is kinda scary as that would overload any input. 40 volts
    is speaker level, or perhaps the output from a 100 watt amplifier.

    Again, use a direct box.

    Dave Vancouver Smith

    ----- Original Message -----
    From: "Charles A. Peavey" <cpeavey@200oakstreet.com>
    Newsgroups: rec.audio.pro
    Sent: Tuesday, August 19, 2003 10:15 AM
    Subject: Hammond X-66 direct into PA

    "Charles A. Peavey" <cpeavey@200oakstreet.com> wrote in message
    news:vk4mo9jqi7n22b@corp.supernews.com...
    > Greetings:
    >
    > Anyone here have any experience in going direct into a PA system with a
    > Hammond X-66: there are three output voltages which vary from 0.35 volts

    to
    > 40 volts. Thanks.
    >
    > regards,
    > Charles
    >
    >

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