Author Topic: ham radio topics  (Read 427 times)

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Offline Mark 79

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ham radio topics
« on: August 15, 2021, 07:18:13 PM »
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  • Part One of this series on NVIS operation focused primarily on the basics of NVIS; what it is, why it is, how it works, and listed some of the major factors involved in successful NVIS operation, briefly touching on these factors. Link here: https://www.americanpartisan.org/2021/05/nvis-techniques-part-one

    Part Two of this series on NVIS operation looked at HF listening and transmitting techniques, some specific to NVIS. Link here: https://www.americanpartisan.org/2021/05/nvis-techniques-part-2

    Part Three discussed how to decide which HF radio to purchase. Several common civilian amateur radios will be reviewed in some detail, and general characteristics desirable in an NVIS station specifically was discussed. Link here: https://www.americanpartisan.org/2021/05/nvis-techniques-part-3/

    Part Four reviewed NVIS antenna characteristics in detail, and discussed different types of operation and a brief discussion of the implications of these differences on antenna sɛƖɛctıon.  Link here: https://www.americanpartisan.org/2021/06/nvis-techniques-part-4/

    Part  4 1/2, was an amplification and further discussion of simple NVIS antennas in more detail, including the effects of height on antenna performance in response to questions.  Link here: https://www.americanpartisan.org/2021/07/nvis-techniques-part-4-1-2/

    Part 5 is a discussion of advanced NVIS antennas  primarily for fixed locations and beginning to touch on NVIS operation in non-permissive environments. https://www.americanpartisan.org/2021/08/nvis-techniques-part-5/

    Offline Incredulous

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    Re: ham radio topics
    « Reply #1 on: August 15, 2021, 11:31:50 PM »
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  • "Some preachers will keep silence about the truth, and others will trample it underfoot and deny it. Sanctity of life will be held in derision even by those who outwardly profess it, for in those days Our Lord Jesus Christ will send them not a true Pastor but a destroyer."  St. Francis of Assisi


    Offline bodeens

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    Re: ham radio topics
    « Reply #2 on: August 16, 2021, 12:59:20 AM »
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  • Good articles. HF also happens to be a solid way for long range for packet communications, which in a grid-down situation or other times can be used to share files (bandwidth is pitiful compared to VHF/UHF of course though). 

    To anybody not into this essential life skill... Understanding radio theory and getting a license (or just study the material if you are worried, which is reasonable) pretty much teaches you basic electronics too. 
    "We dare not even start to hope until the Faith, the true Faith, and its revealed content, are secured in our minds. Only in terms of Faith do we dare to hope."

    Offline Mark 79

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    Re: ham radio topics
    « Reply #3 on: August 16, 2021, 11:50:45 AM »
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  • “…. I will re-iterate that these skills, along with Land Navigation, are among the most perishable and most difficult to learn- under duress, near impossible. So for those of you who feel you’ll do it when ‘the time comes’, you’ll be sadly mistaken.  Please folks, try this at home.”

    One of the article's opening lines. So true. Too many think they will do without a license, then open the box and magically communicate. Nope. Need practice, especially with HF.

    Offline bodeens

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    Re: ham radio topics
    « Reply #4 on: August 16, 2021, 12:04:56 PM »
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  • I'd say QRP is really the ultimate field test, if you can communicate with low wattage in HF you are golden. It's far different than putting a 100W mobile VHF rig in your car and hitting repeaters in town. I don't think VHF/UHF reward operator skill such as antenna design nearly as much, almost anyone can use a set of GMRS HTs, for example.
    "We dare not even start to hope until the Faith, the true Faith, and its revealed content, are secured in our minds. Only in terms of Faith do we dare to hope."


    Offline Matthew

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    Re: ham radio topics
    « Reply #5 on: August 16, 2021, 04:21:00 PM »
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  • I love this thread already!

    I've been a ham since Nov 2019. My son got his license this year right after he turned 15. A week ago he upgraded to the highest level, Amateur Extra.

    Getting into QRP (low power) myself since it goes well with HOMEBREW build-your-own stuff, which is my main interest.

    Currently building an antenna tuner (L-match) for my QRP radio.
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    Offline Mark 79

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    Re: ham radio topics
    « Reply #6 on: August 16, 2021, 07:16:33 PM »
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  • Have you done QRP and NVIS together? I use a low ¼-wave horizontal dipole for 80-40-20 and need the 100 Watts to transmit voice, can do digital at about 25 Watts. Even though low-mounted I can still DX to ID, OR, and TX from zone7, rarely hit the East Coast. I don't have enough space to hide a ¼-wave 160.

    Offline bodeens

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    Re: ham radio topics
    « Reply #7 on: August 16, 2021, 07:33:57 PM »
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  • I love this thread already!

    I've been a ham since Nov 2019. My son got his license this year right after he turned 15. A week ago he upgraded to the highest level, Amateur Extra.

    Getting into QRP (low power) myself since it goes well with HOMEBREW build-your-own stuff, which is my main interest.

    Currently building an antenna tuner (L-match) for my QRP radio.
    Can't wait to have kids. People always say kids hate radio but it's always the opposite whenever you start DXing and hear pretty much anything they are glued. That's how I got hooked, I remember getting broadcasts from Asia SWLing with my dad. My fondest memories from my childhood where I bonded with my dad most were always over radio. 
    It's fun to split up into "squads" and do check-ins when you reach certain points when hiking and do reports. Don't know if you and your son have done this but my wife's brothers and I will do this when somebody's riding the ATV in the woods and we'll practice mapping as well as radio with this. I know when I have a son I will do this :) I am thinking about doing some APRS projects as well as a private pager network for around the homestead, my wife can't always find me and am thinking this would be a good solution.
    Have you done QRP and NVIS together? I use a low ¼-wave horizontal dipole for 80-40-20 and need the 100 Watts to transmit voice, can do digital at about 25 Watts. Even though low-mounted I can still DX to ID, OR, and TX from zone7, rarely hit the East Coast. I don't have enough space to hide a ¼-wave 160.
    No, but I should get into HF more deeply because I have the acreage for an antenna farm and don't have any zoning laws on my property or CCRs/HOAs. If anything hurts the hobby it is CCR/HOA business, not it being "inaccessible" or whatever meme. I've only started living out here recently though so I only have my UHF/VHF/CB rigs setup at the moment (those see active licensed and unlicensed usage, not only voice but packet out here so I am kept busy on the airwaves). I have some UHF projects with some friends (meshnet) but at some point I'll have to get serious about HF again now that I am out of the city. It's the time/money/fatigue conundrum, usually at least one of those is an issue :) 
    "We dare not even start to hope until the Faith, the true Faith, and its revealed content, are secured in our minds. Only in terms of Faith do we dare to hope."


    Offline Mark 79

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    Re: ham radio topics
    « Reply #8 on: August 16, 2021, 07:54:30 PM »
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  • I'm in ITU zone 7 and Matthew is in Zone 5, but the Houston area is probably within my dipole nulls. I oriented my dipole to optimize North-South capability. What about you, Bodeens? Can you share your zone? If you are worried about PERSEC, I understand.

    Offline bodeens

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    Re: ham radio topics
    « Reply #9 on: August 16, 2021, 09:24:42 PM »
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  • Zone 6 here.
    "We dare not even start to hope until the Faith, the true Faith, and its revealed content, are secured in our minds. Only in terms of Faith do we dare to hope."

    Offline Mark 79

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    Re: ham radio topics
    « Reply #10 on: August 16, 2021, 09:31:26 PM »
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  • I can usually get the northern half of zone 6, but have the mirror dipole null for the southernmost portion of zone 6. Maybe the three of us can connect when you get your HF set up.


    Offline Matthew

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    Re: ham radio topics
    « Reply #11 on: August 16, 2021, 10:04:52 PM »
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  • My antenna is about 40' up, but it's a fan dipole in a maypole configuration. So 3 sets of dipole legs going off in different directions. The dipoles act as guy wires holding the mast stable. My dipoles are 160 80 and 40. But obviously the lower bands are not high enough for a 1/4 much less 1/2 a wavelength. So pretty omnidirectional, even NVIS.

    But the higher bands work better for me, at least for DX-ing.

    My son doesn't have an HF rig yet (those things aren't cheap!), but I involve him in all my ham radio stuff.

    He had a good Freshman year of homeschool. His ham radio studies (videos, labs, practice, studying, etc.) constituted a 1-year science credit, based on the # of hours he put in. Since he aced the tests, he's getting an A in the course.
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