Author Topic: brushbeater blog post discussion  (Read 33551 times)

Offline Smurf Hunter

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Re: brushbeater blog post discussion
« Reply #150 on: November 27, 2018, 07:55:50 AM »
True.  If you were a hard core SOTA type, you might also have $200 hiking boots. 

Offline Alan Georges

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Re: brushbeater blog post discussion
« Reply #151 on: November 28, 2018, 06:17:33 AM »
Problems at a major "privacy first!" mail service reported, along with commentary on the weakness of centralized ongoing procedures:  https://brushbeater.wordpress.com/2018/11/28/unseen-is-outage-all-your-eggs-in-one-basket/

Offline Alan Georges

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Re: brushbeater blog post discussion
« Reply #152 on: December 12, 2018, 06:16:53 PM »
An article about an NYU professor making odd claims that the FCC changing the current HF baud rate limits has national security implications: https://brushbeater.wordpress.com/2018/12/06/article-proposed-fcc-ruling-may-hurt-national-security/ 
Like I said, odd stuff.

Next up, something a little more practical, an article about a marginal improvement over the venerable G5RV: https://brushbeater.wordpress.com/2018/12/11/johnnymac-sends-a-true-multi-band-antenna/   
Hm, you're going to need a tuner either way, so I don't see this as a big deal.  Maybe an advantage if you have a long coax run or something.  Meh, it it's going to get this complicated just give me a random wire.

Anyway, it's good to see activity over at brushbeater.

Offline cidyl

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Re: brushbeater blog post discussion
« Reply #153 on: December 14, 2018, 04:54:53 PM »
This might be my favorite - https://www.americanpartisan.org/2018/11/writing-a-tactical-soi/

The title caught my eye, SOI has a couple meanings and the first that comes to my mind when I see it is Signal Of Interest.  The example authentication challenge between Apache and Cherokee certainly qualifies as that, especially on the frequencies listed.  Hearing that exchange would pique anyone's curiosity, better to take a "when in Rome" approach based on the frequencies|bands you're on I'd think.  Scott and Bob talking about whose turn it is to buy lunch or if they forgot the toolbox on Red|Yellow Dot maybe.  The best coded messages are the ones nobody even recognizes as being coded after all, or that's what I've heard anyway.

Offline Alan Georges

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Re: brushbeater blog post discussion
« Reply #154 on: December 14, 2018, 06:11:24 PM »
Yeah cidyl, that's a top-notch article, one I keep revisiting.

The best coded messages are the ones nobody even recognizes as being coded after all,
There are both deep information theory truths and practical pointers in that statement.

Offline Alan Georges

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Re: brushbeater blog post discussion
« Reply #155 on: December 22, 2018, 12:18:24 PM »
Over at the other place NC Scout posts: The Jungle Antenna Revisited

Dumb question: Other than the ability to improvise from scraps, does a jungle antenna have any advantages over a 450 ohm window line slim jim?  I guess a jungle antenna melts into the background a little more easily than a scrap of window line, maybe, but are there any transmission pattern or bandwidth advantages for one over the other?  Seems like a lot less to snag when snaking a slim jim up and down through brush.  Any thoughts?

Offline Greekman

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Re: brushbeater blog post discussion
« Reply #156 on: December 23, 2018, 10:43:55 AM »
very different radiation patterns. The Jungle (groundplane) antenna is as spherical pattern as it can be and has practically no gain.

the Slimjims/jpoles have a flatter radiation disc and considerable gain.

search Youtube for Guerilla Comms practical application test of both designs
 https://www.youtube.com/channel/UCSSOElgoCSU9wNcN5VpgoEw

Offline Alan Georges

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Re: brushbeater blog post discussion
« Reply #157 on: December 23, 2018, 04:44:36 PM »
Thanks GM.  Here's the closest video I found: https://www.youtube.com/watch?v=v1RVswglCHM  Kind of long, might want to jump to the last 5 or so minutes.

Unless I have to MacGyver up a jungle antenna out of scrap wire, I'll stick to window line slim jims.

Offline Greekman

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Re: brushbeater blog post discussion
« Reply #158 on: December 25, 2018, 11:53:41 AM »
that is exactly the idea behind the jungle antenna. You can practically make it by twisting wires together.
Somewhere in the HAM Radio section there is a link to my built.

or you can have a look at these in my blog.
https://survivalcomms.wordpress.com/?s=jungle

Offline Alan Georges

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Re: brushbeater blog post discussion
« Reply #159 on: December 28, 2018, 06:07:26 AM »
NC Scout's year-end wrap-up and plans for next year: https://brushbeater.wordpress.com/2018/12/28/end-of-the-year-analysis-training-goalsand-turning-up-the-heat/

Which reminds me, I need to get on a list of things I want to accomplish in 2019.

Offline Alan Georges

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Re: brushbeater blog post discussion
« Reply #160 on: January 05, 2019, 08:30:18 AM »
A Good Site on Understanding Baluns

Will have something constructive to add later in the weekend.

Offline gnoticpasta

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Re: brushbeater blog post discussion
« Reply #161 on: January 08, 2019, 08:12:19 AM »
Nothing to add, other than, this is an excellent thread. I've got about 10 tabs open.. and I seriously laughed at the "$200" hiking boots comment.  They're only $200 when on sale.  ;D ;D (Not a serious SOTA guy, but a serious hiker/backpacker)


GP

Offline Alan Georges

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Re: brushbeater blog post discussion
« Reply #162 on: January 10, 2019, 06:20:19 AM »
New up today: https://brushbeater.wordpress.com/2019/01/10/from-a-reader-observations/

Like the title says, observations.  Here's one:
Quote
The big problem I see are is lazy approach to commo.  They want to buy a top of the line xcvr [transceiver] and plug/play with the magic antenna that does every thing for them.  I tried to make one of those but I couldn’t find enough wire that contained >50% Unobtainium.
I'm willing to bet that Carl has a supply of that wire squirreled away somewhere.

Glad you're enjoying the thread GP.  Much good stuff over at brushbeater, and generally good commentary over here too.

Offline Smurf Hunter

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Re: brushbeater blog post discussion
« Reply #163 on: February 12, 2019, 08:57:09 AM »
I made a couple wire j-poles from the magic spool of wire this weekend.
Great use for scrap chunks of coax with only one end piece.

Offline Alan Georges

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Re: brushbeater blog post discussion
« Reply #164 on: February 12, 2019, 06:18:36 PM »
NC Scout hasn't been posting much lately over at brushbeater, but he's been burning it up over at American Partisan.  Here are his comms-related posts over the past month or so:

https://www.americanpartisan.org/2019/02/smiley-antennas-field-grade-rugged-handheld-antennas/
Will likely pick up one or two and test in the near future.

https://www.americanpartisan.org/2019/01/field-phones/
Hard wires, minimal RF signature.

https://www.americanpartisan.org/2019/01/force-multipliers-the-dakota-alert-motion-detector-for-patrols-and-rural-security/
Sneaky tricks with good ol' MURS.  Jack discussed similar on his podcast back in the day.

https://www.americanpartisan.org/2019/01/a-quick-and-dirty-guide-to-pirate-radio/
Some assembly required.  Parrot and eyepatch not included.

All interesting comms stuff, and very much worth the reads if only for general information.  I don't have much to add.

Offline cidyl

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Re: brushbeater blog post discussion
« Reply #165 on: February 13, 2019, 07:41:19 AM »
NC Scout hasn't been posting much lately over at brushbeater, but he's been burning it up over at American Partisan.  Here are his comms-related posts over the past month or so:

https://www.americanpartisan.org/2019/02/smiley-antennas-field-grade-rugged-handheld-antennas/
Will likely pick up one or two and test in the near future.

https://www.americanpartisan.org/2019/01/field-phones/
Hard wires, minimal RF signature.

https://www.americanpartisan.org/2019/01/force-multipliers-the-dakota-alert-motion-detector-for-patrols-and-rural-security/
Sneaky tricks with good ol' MURS.  Jack discussed similar on his podcast back in the day.

https://www.americanpartisan.org/2019/01/a-quick-and-dirty-guide-to-pirate-radio/
Some assembly required.  Parrot and eyepatch not included.

All interesting comms stuff, and very much worth the reads if only for general information.  I don't have much to add.

I can vouch for the Smiley Super Stick II 150 MHz, was one of the first HT antennas I ever purchased.  Tuned for 145-155 MHz a good compromise for 2m ham, MURS, and VHF biz band/public safety.  Too big and rigid for constant use but a noticable improvement over rubber ducks at fringe range, it lives in my go-bag.

The description on how the Dakota Alert works in the force multiplier article isn't accurate, almost defies logic that he's been using them for years and doesn't know how they operate.  The sensor itself is passive, it doesn't emit any light - IR, visible, or otherwise.  There is a LED above the sensor that can be set to blink when motion is detected, but that's selectable by changing a jumper.  And "sending out a message of ALERT ZONE 1-5"?  But a nice paint job.

Offline Smurf Hunter

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Re: brushbeater blog post discussion
« Reply #166 on: February 13, 2019, 09:43:08 AM »
I can vouch for the Smiley Super Stick II 150 MHz, was one of the first HT antennas I ever purchased.  Tuned for 145-155 MHz a good compromise for 2m ham, MURS, and VHF biz band/public safety.  Too big and rigid for constant use but a noticable improvement over rubber ducks at fringe range, it lives in my go-bag.

The description on how the Dakota Alert works in the force multiplier article isn't accurate, almost defies logic that he's been using them for years and doesn't know how they operate.  The sensor itself is passive, it doesn't emit any light - IR, visible, or otherwise.  There is a LED above the sensor that can be set to blink when motion is detected, but that's selectable by changing a jumper.  And "sending out a message of ALERT ZONE 1-5"?  But a nice paint job.

Are none of those dual band 2m/70cm?  If I'm really deep in the woods I'll carry a roll up jpole and toss into the trees, but for walking around during public service events, a big antenna can be a little cumbersome, and there are times I need to work on both UHF and VHF.  Switching antennas back and forth might be old.

Offline cidyl

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Re: brushbeater blog post discussion
« Reply #167 on: February 13, 2019, 10:28:37 AM »
Not sure on the telescoping ones, they have ones tuned to 150 and 155 MHz centers at least but didn't see a dual bander listed.  First time I'd checked out their offerings in many years.  Extended the Super Sticks are 4' tall so not for walking around with, at the time I bought mine we were using strictly VHF radios and they did help at the fringes but swapping was a pain.