Telemetry(?) on 143.760Mhz

Discussion in 'VHF/UHF - 50Mhz and Beyond' started by K4AQO, May 10, 2015.

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  1. K4AQO

    K4AQO Guest

    I am picking up tones and chirps and such on 143.760, sounds kind of like an old dial-up modem. Any ideas as to what it is?
     
  2. KA9JLM

    KA9JLM Ham Member QRZ Page


    Do you have cable TV in your area ?

    If so, It could be cable leakage.


    Good Luck.
     
  3. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    I can't find a reason to listen above or below the ham bands. Could be anything. Lots of services authorized outside the ham bands, and several authorized inside the ham bands that aren't exclusive.
     
  4. ND5Y

    ND5Y Ham Member QRZ Page

    The actual frequency is more likely 143.7625 and is a federal government allocation. Are you near any military bases or airports?
     
  5. WB2WIK

    WB2WIK Platinum Subscriber Platinum Subscriber QRZ Page

    Good point, and also 'who cares.' Why do people tune their ham rigs outside the ham bands...I can't recall ever doing that in 50 years of hamming.:p
     
  6. W1BR

    W1BR Premium Subscriber QRZ Page

    He could be a scanner user. Or, a MARS member. Lots of reasons to listen outside of the ham bands. Some folks even listen to SW stations :)

    To answer the question, that is also the aural carrier frequency for cable channel 17.

    Pete
     
  7. K4AQO

    K4AQO Guest

    I am a little ways away from Tyndall AFB and there is an airport a few miles from my house, but cable channel 17 makes the most sense to me.
     
  8. KA8NCR

    KA8NCR Ham Member QRZ Page

    If it is the aural, he'd hear the channel audio not beeps and tones. Most cable systems are digital and no longer transmit NTSC, so I am not sure this is cable.
     
  9. KA9JLM

    KA9JLM Ham Member QRZ Page

    It could even be a computer near by.

    If you set your SDR Dong antenna next to a computer with the side removed, You hear all kinds of Aliens and UFOs, when you scan the spectrum.


    I thought I was the only one that knew what a Dialup Modem sounds like. :eek:
     
  10. KD4MOJ

    KD4MOJ XML Subscriber QRZ Page

    Yep:

    Civil Air Patrol Channels:
    (Mode listed before frequency, remarks listed after frequency)
    NATIONWIDE VERY HIGH FREQUENCY NETWORKS
    Repeater Frequencies:
    Repeater Pair F-1 FM 148.1500 (in: 143.900-may be remote paired with 165.300)
    Repeater Pair F-2 FM 148.1250 (in: 143.750-may be remote paired with 165.150)
    Simplex Frequencies:
    Simplex F-1 FM 148.1500 (Repeater talk-around)
    Simplex F-2 FM 148.1250 (Repeater talk-around)
    Simplex F-3 FM 148.1375 (Search and Rescue Tactical)
    Simplex F-4 FM 149.5375 (Air-to-Base)
    Simplex F-5 FM 142.2625 (Search and Rescue Tactical)
    Simplex F-6 FM 143.7625 (Search and Rescue Tactical)
    Simplex F-7 FM 149.4000 (Air-to-Base)


    CAP VHF is a mix of FM and P25.

    ...DOUG
    KD4MOJ

     

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