Low VHF interference

Discussion in 'Over the Air TV By RabbitEars.Info' started by freeisforme, Feb 22, 2017.

  1. Ok, so basically you are dependent on waiting for your local power company to fix those poles. You might be able to work around it, but you'd have to find a high gain Low VHF yagi style antenna, that you can get up HIGH, and away from the power poles to aim directly at your channel 2.
  3. simple questions, how often should i call the electric (2x) company and how long should the wait be?
  4. i thought of that awhile ago but have no where else to go "home all around" unless i take a drive
  5. SDR stands for Software Defined Radio or Software Defined Receiver. They tune in a signal that is demodulated in software.
  6. Commercial AM radio ranges from 535 to 1605KHz so your SDR setup is highly suspect in terms of what frequency it is telling you it has tuned. What you might find around 54MHz you wouldn't be able to listen to as it would almost certainly be a DTV television signal on RF channel 2. There may be some emergency services that can legally broadcast audio on that frequency but otherwise it is strictly reserved for commercial television broadcast. In any case, it probably wouldn't be AM modulated audio (NTSC used FM audio and DTV doesn't broadcast a separate audio carrier).

    I don't imagine that SDR is going to get you what you seek.

    What I would suggest is that you contact a nearby amateur radio club or amateur radio supporting storefront and see what insights they can offer. Chances are they've had to deal with the same thing and may even have access to the ideal equipment to help track it down.

    54KHz is Navy VLF radio.
    k.r., reddice and primestar31 like this.
  7. I know that much, I just question how useful an SDR would be in tracking down noisy power poles. Considering the way I believe they work, they might not easily detect the interference as well as an analog old-school am pocket radio would.
  8. Is it possible that the wrong frequency is tuned on the SDR? Pretty easy to mix-up MHz vs KHz and the number of zeros. 540-600KHz (.54-.60MHz) is AM broadcast band.

    An SDR with a small UHF loop antenna (or wire hangar) makes an excellent tool for tracking the source of interference. Even the cheap 8" antenna provided with a SDR dongle will identify nearby interference if used in conjunction with the software RF gain.
    freeisforme, primestar31 and KE4EST like this.
  9. I agree on the mixup between kHz and MHz. In the old analog days, there were a lot of issues with channel 2 receiving interferance from the 6 meter ham band (50-54 MHz). It was almost always a problem with a sloppy receiver section of the TV, but that never stopped complaints from being filed and the FCC and local police from becoming involved. Having a noticable antenna was a magnet for these complaints.

    The best one was a case where my parents were approached by the FCC, the sheriff, the local police and were eventually sued over interference. The ironic part was that I was in the air force at the time and was deployed to Brazil for that entire summer, but my folks had to prove that my equipment, just sitting there disconnected wasn't causing interference.
    freeisforme likes this.
  10. in my rush to judgement i could have did that. i post 2 pic there on page 2.
  11. sounds like a nightmare. hope everything worked out ok.
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