NVIS Primer

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Put up with the annoying pagination and read the whole thing – or direct your S-6 to do the same.

Useful info indeed.

9 responses to “NVIS Primer

  1. NVIS and the new FSQ mode, now available with FLDigi, provide interesting possibilities for regional communications at extremely low power.
    NVIS at less than a watt output means extremely low probability of intercept and low probability of being DFed, especially if proper terrain is chosen.

  2. I’m a big fan of NVIS, on about 35 watts on the 40m I routinely see clear comms out to about 375 miles. People 150 miles away sound like they are sitting next to me! My setup is a portable Buddipole antenna, they even have a manual free on their site showing you how to configure for NVIS:
    http://www.buddipole.com/documentation.html
    I can be up and running mobile anywhere on any band 10-40m in 15 minutes with this set up. This is a good quality piece of kit!
    My next homework assignment is to combine my new ability to transmit PSK31 digital with 40m NVIS!

  3. That’s interesting stuff right there,thanks,but I thought the earth was flat.
    😉
    CIII

  4. I have successfuly used NVIS with a home made dipole to contact my buddies throughout the state. I am using a 5W FT817ND which is a nice, low power, man-portable Yaesu. I have made contacts out to 600 miles as well, without a reflector. Some of this depends on atmospheric conditions too. The point that needs to be made is that it takes some time and effort to get ramped on this stuff. Someone or preferably two, need to be SMEs right now.
    Also check out AMRRON, sparks31, Dan Morgan and NC66 (http://www.n6cc.com/field-antenna-kit) for some good info. Get your FCC ticket. You need it to practice. Get smart with the above sources. Participate in a comm exercise and start talking to meat space friends via VHF/HF radio. Get smart on sending digital. All you need is a computer with free software and a radio.
    Of course, you have to do all this and remain tactically proficient and get your intel section ramped up via Forward Observer while prepping food, medical via Doc Grouch and dealing with normal family disasters and routine business. Oh and your job, if you are lucky.

  5. Alfred E. Neuman

    Reblogged this on The Lynler Report.

  6. Yenta of Sipsey Street

    Great link! My experience with NVIS shows exactly what is told here. Good stuff. I have over 275 confirmed on DXCC (6 Band) and yet NVIS is great to work all my friends inn the Mid-South and Southeast.

    When SHTF, how much of an area can you control? Can your squad sized group (11 self appointed/self-anointed bad dudes) control even a moderate sized subdivision??

    NVIS WILL connect you with other groups in a reasonably close area.

    Get your ham ticket now so that when the RF sniffers get nosy, they find existing hams just “talking” to one another. This could be very important.

  7. This is one of the best articles that I’ve read on the topic and thank for sharing. One problem many hams have wrapping their brains around it antenna height. With NVIS it’s as low, low, low to the ground. It’s also important to choose good dirt. Making NVIS work is about an understanding of the wire, the dirt, and the sky. Once that is understood, it’s super effective.

    The first contact I made at our little exercise in Alabama was with a dipole. Balun pulled about 15′ up a lamp post with the driven element (60′ wire) hanging between the lamp post and a small tree in the parking lot. The ground element (60′ wire) was just laying on the ground roughly parallel to the driven element. That’s essentially a 2-element yagi pointed to the sky.

    Learn how to burn clouds!