+9 noise level 256 days a year. any help?

Discussion in 'General Technical Questions and Answers' started by N9ZDZ, Mar 30, 2019.

ad: L-HROutlet
ad: l-rl
ad: MessiPaoloni-1
ad: HRDLLC-2
ad: abrind-2
ad: Left-3
ad: L-Geochron
ad: Left-2
ad: L-MFJ
  1. KA9JLM

    KA9JLM Ham Member QRZ Page

    They can work good, If the interference is only coming from 1 direction.
    N9ZDZ and G5TM like this.
  2. N9ZDZ

    N9ZDZ Ham Member QRZ Page

    Its really bad now.
    Last edited: Jul 22, 2019
  3. K8ERV

    K8ERV QRZ Member QRZ Page

    I have hat problem till I ask my wife to be quiet.

    TOM K8ERV Montrose Colo
  4. K8MHZ

    K8MHZ Ham Member QRZ Page

    Did I miss something, or was the question asked why only 256 days a year?
  5. VE3CLG

    VE3CLG Ham Member QRZ Page

    Yes the rest of the days radio is off ?
  6. K7TRF

    K7TRF Premium Subscriber QRZ Page

    That's what I was wondering. Does this noise goo away for 100 days a year? If so, are those rainy days or dry days or days when some local shop isn't open or something else? Or was that just a typo and the noise is present 365 days a year?

    It seems clear from the audio on those linked videos that there's a substantial noise source somewhere near the antenna. Sure common mode or other things could contribute but there is a significant noise generator somewhere near his location. I'd try to track it down using all available methods like a battery powered airband receiver to try to pinpoint where that noise is coming from and work with whatever person or agency it takes to eliminate the noise at its source. It could be many things including switching power supplies, invisible dog fences, cracked power line insulators, neon or other lights, leaky data lines, remote meter reading systems or other things but there's almost certainly some large RFI generator near the operating location and band aids like common mode chokes and phasing noise cancellation systems likely won't cure the underlying problem.
  7. N8FVJ

    N8FVJ Ham Member QRZ Page

    MFJ sells a tunable interference filter called MFJ-1025. It tunes out noise from one direction. Easier to use vs changing your antenna location, but expensive.
  8. WN1MB

    WN1MB Ham Member QRZ Page

    With all due respect, you three need to read all the entries in threads before you chime in. To wit:

  9. WN1MB

    WN1MB Ham Member QRZ Page

    If I'm not mistaken, it's from one source - not "direction."
    K8AI likes this.
  10. N8FVJ

    N8FVJ Ham Member QRZ Page

    What? One source must be in one direction.

Share This Page