1. In celebration of the launch of the new redesigned site, we just gave away a FREE antenna! Click Here to See Who Won!

"Hum" on input from radio to mixer

Discussion in 'Ham Equipment' started by N0WY, Mar 19, 2012.

  1. N0WY

    N0WY Member

    Joined:
    Aug 11, 2010
    Messages:
    13
    Likes Received:
    0
    Hey all,

    I have waded into the land of dedicated audio equipment for my amateur radio equipment and am amazed by the reports I am receiving from others.

    I do have one problem I have yet to work out and was wondering if anyone had any ideas...but first let me explain what I have setup, as I am sure that would be the first question asked of me.

    Yaesu FT-857
    LDG YT-100 Tuner
    Behringer 1622FX USB Mixer
    iPlus by W2IHY
    Heil PR-781
    Yaesu FP-1030a Power Supply

    I am thinking the issue is that I do not have the power supply, tuner or radio grounded and I have heard that that could cause a hum. My issue is that I am in a 2nd story "office" in my house and running a ground that long would just turn it into another antenna.

    So I am wondering what I can do to work on getting rid of the "hum".



    Thanks so much,

    Michael
    #1
  2. Moleculo

    Moleculo Administrator Staff Member

    Joined:
    Apr 14, 2002
    Messages:
    8,305
    Likes Received:
    527
    I had a mean ground hum in my audio chain introduced by a Heil mic cable. In my case it was causing a ground loop. To solve the problem, I disconnected either the shield or ground wire from the rig side of the cable (I forgot which wire I removed but I remember it being obvious when I looked at the wiring diagram). The other thing to check is that all of the audio equipment is grounded to a common ground bus. Concentrate on the audio chain and you'll probably find the problem.
    #2


Share This Page