Discussion in 'On-Air Operations - Q&A' started by G0PCF, Jan 3, 2018.

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  1. G0PCF

    G0PCF Ham Member QRZ Page


    Has anyone any idea as to what might be causing this ? Not all signals are decoding.
  2. KP4SX

    KP4SX Premium Subscriber QRZ Page

    50 Hz hum on the audio?
    K6CLS and K7TRF like this.
  3. K7TRF

    K7TRF Premium Subscriber QRZ Page

    Yup, you've got some signal repeating at what looks very, very close to a 50Hz interval. Given your G0 call prefix the most likely culprit is strong 50Hz hum on your audio.

    How are you coupling audio into your computer for digital decoding? Are you using a rig audio to PC interface with transformer isolation?
  4. G0PCF

    G0PCF Ham Member QRZ Page

    Thanks to you both for your input. I'm using a SignaLink USB interface. Have increased RF and keeping RX audio at 40%. This seems to have resolved the problem.
    Bruce G0PCF
    Last edited: Jan 4, 2018

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