Software Defined Radio VLOG – Part 1

In this vlog show my progress building a software defined radio and discuss the online contention over the detector. This project will be presented in full w…

/25 Comments/by
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25 replies
  1. Joseph Lamoree
    Joseph Lamoree says:

    I understood about 1/4 of that. If you wouldn’t mind, would you please
    record a few hundred more videos like this? Hehe. Thank you Jeri.

    Reply
  4. juttdisco1
    juttdisco1 says:

    i would pay to watch, but i reckon you will be done in 3 seconds and that
    includes pulling your pants down.

    Reply
  5. nerdyrcdriver
    nerdyrcdriver says:

    wait, the first 10 sec is exactly what I say. But it hasnt been cleared
    because my parents always rush me to do things that arent my responsibility
    so I dont have time to clean up. plus I get too excited about the finished
    project and I forget about cleaning.

    Reply
  6. jeh14
    jeh14 says:

    NIST has not decided to terminate WWV service yet – but they are asking
    listeners / users of their broadcast services to fill out a survey –
    presumably they may end or at least cut back on the broadcast services if
    need doesn’t seem to be apparent. So, everyone who find the service
    valuable (for, among other things, testing new radio designs!) should
    participate. YT does not permit links in comments but G for wwv survey
    site:nist.gov should find it.

    Reply
  7. NotSoLiberal
    NotSoLiberal says:

    Very nice. This is exactly what I was trying to do. I would love if you
    have pointers to resources you used going forward in this project.

    Reply
  10. Jason Wilson
    Jason Wilson says:

    Hi, Jeri, long time listener first time caller. I wish I would have seen
    this project sooner. I previously had built a KB9YIG softrock RXTX. I have
    always wanted to build a portable replacement for the PC. And have always
    wanted to play with FPGAs. Looks like I have some work to do. I love the
    simple front end you have put on that receiver. And was amazed at how
    relatively clean your noise floor was considering the construction. GOOD
    WORK!

    Reply
  11. Paul Palinkas
    Paul Palinkas says:

    No worries about WWV disappearing. What’s going away are the propagation &
    solar weather reports. Also, cool project!

    Reply
  13. Inachu Ikimasho
    Inachu Ikimasho says:

    @jeriellsworth I showed a guy your video who has been doing this stuff his
    entire life and he suggested at your next physical get checked for any
    ccancer from overdosing from rays and so forth! I hope you are ok.

    Reply
  15. M. Eric Carr
    M. Eric Carr says:

    @jeriellsworth A practical education in electronics for free? No, I
    definitely don’t “mind” watching at all! 😎

    Reply
  17. w2aew
    w2aew says:

    Excellent stuff Jeri! There’s nothing like the satisfaction that comes from
    hearing something recognizable from a homebrew receiver! I too remember
    tuning in WWV late at night on my old Realistic DX-160 to align the offset
    on the bandspread dial.

    Reply
  20. M. Eric Carr
    M. Eric Carr says:

    Very cool. I figured there was going to be an FPGA involved somewhere! I
    hope they keep WWV around; I remember doing a science fair project on MUF
    (Maximum Useable Frequency) prediction (using MiniMUF software) based on
    tuning in the various WWV frequencies. It didn’t work very well, but I
    learned a bit about RF propagation. Thanks for sharing — really enjoying
    the new channel; it’s always fun to be there (even virtually) when a
    project like this starts to “wake up” and produce cool results!

    Reply
  21. Pruncible
    Pruncible says:

    From what I recall from my AM/FM communications class: Normal radios
    generally have a signal of a few kHz bandwidth on a multiple MHz (or
    higher) carrier. In HW, they eliminate the carrier, then output the signal.
    Over time, radio receivers have improved about linearly with time. Software
    defined radios do minimal filtering in HW, passing the
    filtering/processing/separation on to software, which harnesses the power
    of CPUs whose power is growing exponentially with time.

    Reply
  22. Jeri Ellsworth
    Jeri Ellsworth says:

    @300000hp I’ll have to try again. I had bad luck the first few times. Most
    of the time the photo process works well down to 10/10 mil.

    Reply

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