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too much hum...

Discussion in 'Electrical Engineering' started by Farmdog, Jun 22, 2005.

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  1. Farmdog

    Farmdog Guest

    Ok, here's the deal. I'm trying to record from my turntable to my pc. I have
    a Newmark TT200 turntable and a good stylus. I'm using a Gemini PMX 01 mixer
    as
    my preamp. I have my turntable grounded to the Mixer as required. However, I
    seem to be getting a lot of hum as if its not grounded well. last week I
    grounded the turntable and the mixer separately to ground wires in the wall
    and the hum is still there. Pretty hard to record with all that hum in the
    background. my question is where is the hum coming from? My guess is that
    its from crappy wiring in the Mixer. Am I doing something wrong in the
    grounds? Someone once told my that to avoid electrical hum, use a batters
    as an energy source instead of a wall plug..any ideas??

    George
     
  2. Roy Q.T.

    Roy Q.T. Guest

    too much hum...

    Group: alt.engineering.electrical Date: Wed, Jun 22, 2005, 6:27am
    (EDT-3) From: (Farmdog)
    Ok, here's the deal. I'm trying to record from my turntable to my pc. I
    have a Newmark TT200 turntable and a good stylus. I'm using a Gemini PMX
    01 mixer as my preamp. I have my turntable grounded to the Mixer as
    required. However, I seem to be getting a lot of hum as if its not
    grounded well. last week I grounded the turntable and the mixer
    separately to ground wires in the wall and the hum is still there.
    Pretty hard to record with all that hum in the background. my question
    is where is the hum coming from? My guess is that its from crappy wiring
    in the Mixer. Am I doing something wrong in the grounds? Someone once
    told my that to avoid electrical hum, use a batters as an energy source
    instead of a wall plug..any ideas??
    George


    Sad to say: But your equipment is not High End. You should check your
    connections carefully, even then, if you do not have your turntable
    matched properly with your mixer (pre-amp) plus the possibility that you
    have a magnetic head for your stylus will only make things worse., you
    will need a ceramic head or better attenuation to get through the mixer
    & any preamp stages to your computer, or your audio coupling will be
    lacking and Hum, Wow & Flutter will hit you every chance they get with
    any change in Volume, Bass or Treble.....

    Try a seperate preamp before your mixer and Attenuate the Output to the
    mixer, you will need to Minimize your Output because matching the
    computer and audio compnents you are using will be very difficult...
    specially if you have a magnetic output without proper
    pre-amplificatiion.The Ceramic Output Jack on a regular old amp will
    probably do the trick you want.....
    ®oy
     
  3. Roy Q.T.

    Roy Q.T. Guest

    [Don't mind the Paranoid Drug Addicts they complicate everything,
    without regard]

    You'll do well if you pay attention to my first post, it really isn't an
    E.E. problem., but you should nail it with some changes, mild
    troubleshooting & care. ®

    good luck
    ®
     
  4. Bud

    Bud Guest

    Actually he did mention a computer (pc). Roy's posts are often off.
    However, perhaps you could both e-mail each other with the personal
    stuff. It reflects badly on both of you and makes newsgroups a real pain.

    Bud--
     
  5. Roy Q.T.

    Roy Q.T. Guest

    From: (Bud)

    TokaMundo wrote:
    Group: alt.engineering.electrical Date: Wed, Jun 22, 2005, 6:27am
    (EDT-3) From: (Farmdog) Ok, here's the deal. I'm trying
    to record from my turntable to my pc.
    Try a separate preamp before your mixer and Attenuate the Output to the
    mixer, you will need to Minimize your Output because matching the
    computer and audio components you are using will be very difficult...

        He never mentioned a computer at all. Do you always make
    retarded presumptions?

    Actually he did mention a computer (pc). Roy's posts are often off.
    However, perhaps you could both e-mail each other with the personal
    stuff. It reflects badly on both of you and makes newsgroups a real
    pain.
    Bud--

    How Kind of you to mention that Bud, I didn't know you were reading. How
    is it that you can say I'm often off?, since not one of the people i've
    helped come back to say my response didn't work, I know my responses
    work if applied and the least they ameliorate the problems.....But,
    everyone is entitled to their opinions., as you have seen, others are
    just trying to Inflame me., some succeed.

    FYI: I base my responses on my 30+ years of studies in the fields of
    Electronics & Electricity, actual experience and events that have worked
    for me, anyone trying to disclaim that is not tuned in right, or Off as
    well.

    Note * my apologies for my method, words & unorthodox intervention., it
    is not a personal taste of stuff.This is quite a Thankless job we do at
    times.

    Roy
     
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