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How to make a 60khz antenna

Discussion in 'Antennas, Feedlines, Towers & Rotors' started by KL7AJ, Oct 6, 2010.

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  1. KL7AJ

    KL7AJ Premium Subscriber QRZ Page

    Here's an interesting report on the WWVB antenna. Note at the end how the performance is calibrated using Helmholz coils. This is the only way of generating an ABSOLUTE field for measuring antenna gain and such.

  2. AF6LJ

    AF6LJ Premium Subscriber QRZ Page

    Cool more interesting reading when I get back this evening.. :)
  3. KF5FEI

    KF5FEI Ham Member QRZ Page

    We've got a WWVB receiver and two antennas the boss would probably part with -- anyone interested?
  4. AD2U

    AD2U Ham Member QRZ Page

    How big is the antenna? big and thick ferrite rod type antenna?
  5. WB2WIK

    WB2WIK Premium Subscriber QRZ Page

    The automatic synchronizing clocks and wristwatches mostly use the 60 kHz WWVB signal and work in many places with an antenna that's inside the wristwatch.

    Armed with that information I should be able to make lots of contacts on 160 meters with an antenna implanted behind my ear, like the RFID for a dog.

    In fact, I do have one of those. Ever since, I've had this need to chase cars...
  6. AD2U

    AD2U Ham Member QRZ Page

    I think WWVB send 1 bit of information per second, so it is a narrow band system, roughly the band width is in the order of 1 Hz.

    My "atom" WWVB syncing clock will not work if I put a cordless phone (not a cell phone) within 8 inch of it, due to DC-DC converter noise.
    Last edited: Oct 8, 2010
  7. K2WH

    K2WH XML Subscriber Volunteer Moderator QRZ Page

    One evening, with very little to do, I was reading about WWVB and its transmissions on 60khz. I then realized my ICOM 756pro tuned down to 30khz.

    Curiousity got to me and using my 80 meter 1/4 wave vertical, tuned down to 60khz and low and behold I heard the transmission fairly easily. Here is a recording of it as I heard it. It sounds like CW, but it isn't. Later, I found a program on the internet that will decipher the data but can't remember where I got that program.

  8. AD2U

    AD2U Ham Member QRZ Page

    On each second, the WWVB will reduce carrier power by 17 dB - the duration of this reduction means one of the following

    1) 0.8 second - it is the marker bit, sent on 0, 9, 19,... 59 second of the minute.

    2) 0.2 second - it is the zero bit (binary 0)

    3) 0.5 second - it is the one bit (binary 1)

    The are 53 bits in a one minute period, excluding the 7 marker bits.

    Of the 53 bits, 11 bits are not used and sent as 0s, the rest of 42 bits send current time in BCD format.
  9. KF5FEI

    KF5FEI Ham Member QRZ Page

    IIRC, it is a piece of 3" or 4" PVC and is pretty heavy, so it probably is a ferrite rod antenna. They are commercially made and have a name plate, etc... on them.
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