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Locked Winlink laptop computers and mobile chargers #Winlink #VaraFM

 

While trying out a DC to DC mobile laptop charger today, I discovered the VARA receive signal was getting interfered with when the charger was plugged in.
Watching the VARA vector scope, the received Willmar gateway signal looked like a shotgun pattern. Removed the charger and it was a BB, like normal.
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I assumed the PC battery would filter the charger noise, but apparently having the radio and charger on the same supply (car battery, engine running) provided a path for the noise.
The charger appears to be well made, just noisy.
If you are doing mobile VARA ops and are having trouble, it's something to check.
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73
Mike N0QBH
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Locked Winlink / VARA FM Training Session #VaraFM #Winlink

 

In a few weeks we are planning on holding a short workshop on how to set up Winlink and VARA on your Windows 10/11 computer.
We will gather at the Rescue Squad building where we have club meetings.
Come and watch as we set up a new Winlink user from start to finish. - See the clowns working without a net! (just kidding)
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Right now, this is still in the planning stages, but I wanted to let folks know we are still very much into making this grow.
Stay tuned...
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73
Mike N0QBH


Locked Re: HF funnies...

 

That is great Ham Radio humor!


Locked HF funnies...

 

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73
Mike N0QBH


Locked Net Control Needed #netcontrol

 

Hello,
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I will not be in the area for the next two weekends, 9/1 & 9/8, and therefore cannot run the Sunday evening Nets.? I'm asking for someone to take one or both of those dates for net control.? I will announce it on the next Net.? Thanks.? 73
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de WD0HXV
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Tony LaPatka
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Locked Re: Mesh Networking local communications

 

Here is a portable Meshtastic node I've constructed for temporary events like a search and rescue or covering a race.
The hardware is identical to my tower node sans the solar panel as the battery alone is good for a few days of operation.
It's purpose is to be a text repeater.
Located reasonably high with a good antenna (for 915 MHz) to act as a relay for the other Meshtastic users.
Depending on terrain and how high up it's located, this should easily cover a couple mile plus area.
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It consists of a weather tight plastic case with a RAK Meshtastic 915 MHz LoRa module, 5 dBi antenna and a 5A 3.7 volt LiPo battery.
The module has a USB C connector for programming and charging the battery. Plugging and unplugging the battery turns it off/on.
A Bluetooth connection lets a nearby event manager manage the node remotely.
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73
Mike N0QBH


Locked Re: Willmar HHS site coverage conclusions

 

Received this Winlink email from Leon KF0OUA today.?
Google says that park was 44 miles away as the crow flies.
The location GPS coordinates are for his QTH.
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Message ID: EFYM5EK5QDDN
Date: 2024/08/18 21:06 ?(UTC)
From: KF0OUA
To: W0AYE; N0QBH; WD0HXV?
Source: KF0OUA
Downloaded-from: RMS:N0QBH-10
RMS Originator: N0QBH
RMS Path: N0QBH@2024-08-18-21:06:52
Location: 45.104167N, 95.291667W (GRID SQUARE)
Subject: greetings from lac qui parle state park
just finished a pota activation ben. Thought I would try the post office from here. ?yaesu 7800 on low power with a 5/8 wave whip on a mag mount.
**
73
Mike N0QBH
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Locked Re: 900 MHz Proposal to the FCC

 

I just sent my personal reply. My main complaint besides repetition is the small businesses that have grown up building devices for the ISM band.
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Here's the link and Proceeding number
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If you want to file a comment:

The proceeding number is 24-240.

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73

Mike N0QBH


Locked Re: Mesh Networking local communications

 

Here's a good place to start learning about mesh networking.
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I also emphasize, there are no serious dumb questions here.?
While it's radio and electronics, it's also on the leading, bleeding edge of technology with LoRa modulation.
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Locked Re: Willmar HHS site coverage conclusions

 

He's an estimated coverage map that may help. 25 watts from top of the tower to a mobile station with 6 ft antenna

14507wldp_25w_cov4.jpg


On Fri, Aug 9, 2024 at 6:54?AM KB0MNU Ace Bonnema via <ace.bonnema=[email protected]> wrote:
Mike,
Thank you for all of your work on this. ? And a shoutout to others that helped or are helping ?(Tony, Ben, etc.).? It is appreciated. ?


Locked Re: Mesh Networking local communications

 

As I understand Meshtastic, I see no reason why it wouldn't work in a CERT search & rescue operation.
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The small LoRa mesh radio would work with the searcher's phone and both would be on their person.
To use Sibley Park for example, we would position the fixed relay node as high as possible - like Mt. Tom.
This would tie together the smaller mesh networks that would form between the searchers as they move about.
Assuming the searcher's devices all have GPS, their phones could display a map showing their location relative to the others.
MQTT would enhance this by allowing the cellular network to carry this info to the distant command center.
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I'm sure Ben W0AYE can add more to this.
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73
Mike N0QBH


Locked Re: Mesh Networking local communications

 

Interesting Mike. ?You say there’s no dumb questions, so I’ll test that theory. ? Could CERT (our Community Emergency Response Team) use this at say, Sibley park on a missing person call, not only to communicate with each other, but to send their location updates to a command post? ?If so, I imagine we would need something similar to what you have on your tower, on the mast of the amateur radio trailer? ?Then to get over hills etc., we may need another one (like on a command post or the regional mobile comm trailer (currently housed in Alexandria), to create a mini mesh network that potentially links back to our Emergency Operations Center (especially if we do internet link)?


Locked Re: Mesh Networking local communications

 

Meshtastic continued -
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In my previous post I briefly described Meshtastic LoRa RF networking and some of the hardware involved.
Now that I've had my outdoor node online for a month, I know a little more about what is going on around me.
The neighbor with a weather station updating every minute is a constant and I've had no other contact with them and there is no location given.
Occasionally, an active station will pass through on the highway and show up on the open channel (Channel 0) stations list.?
More "exciting" is when an active node in an airplane comes in range. Then the channel 0 station list will show several Meshtastic stations from all over.
This happens when the station in the air hears the stations below and dutifully re-transmits their payload.
You can set your location in the configuration, and if you choose, broadcast it. Then the receiving stations will also plot your location on a map.
Some mesh devices have a GPS built in and (if enabled) can be tracked.?
However, I've yet to have a LoRa text qso with any of them because I wasn't active when they were going by. Kind of typical for radio :)
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MQTT
Connecting mesh users out of LoRa (radio) range via the Internet.
Mashtastic has a built in Internet connection option called proxy that can use the phone or tablet's Internet to send and receive Meshtastic messages.
Each channel (0-7) has the option to use mqtt, but channel 0 is open key, common to everyone and will swamp your connection - avoid it!
Purists will complain mqtt defeats the purpose of mesh networks. Proponents will tell you how it pulls users together in sparsely populated places.
Kind of like WiresX and repeaters?
Using mqtt is up to the user and can be turned off at any time.
W0AYE and myself (N0QBH) have sent messages back and forth on the W0SW channel (Ben's creation) using the mqtt feature.
Along with it's unique name, it also has a 32 bit key which is shared among the users (by invite). No key, no decode.
I will take this opportunity to point out this isn't Ham radio per say.?
However, there is an option to use Meshtastic under your Ham licence with more power and no encryption.
In closing, I believe mesh networking like this could be a Godsend in a long term power outage when most cell sites go dead and your phone has no service.
At that point in time most phones are a fancy paperweight.?
Mesh users will still be communicating with theirs.
In the meantime, it's just nerdy fun on the leading edge.
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Locked Re: 900 MHz Proposal to the FCC

 

5g took half of the C band satellite spectrum so folks could watch movies on their phones.
Now someone else wants to offer yet another GPS solution using the ISM band.
My latest navigation module has no less than 3 separate navigation satellite systems built in - GPS, BeiDou, GLONASS & QZSS.
All of these will be impaired by the government when they get nervous including NextNav.
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Just say no.
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Mike N0QBH


Locked 900 MHz Proposal to the FCC

 

I will find a link to the FCC website for comments?and leave it in a future reply to this post

I urge everyone to make a comment in regard to the infringement of unlicensed users (Meshtastic, RFID) on 900 MHz as well as the secondary use of these frequencies by licensed radio amateurs.

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April 23, 2024??-?By?
Est. reading time: 1:30

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?has petitioned the Federal Communications Commission (FCC) to add a new spectrum solution in the Lower 900 MHz band (902-928 MHz band) to complement and backup GPS. The Lower 900 MHz band plan aims to give access to 15 MHz of low-band spectrum for 5G services.

The company filed a rulemaking petition to the FCC, proposing to rearrange the band to facilitate a terrestrial positioning, navigation and timing (PNT) network and broadband. The petition specifically asks the FCC to reconfigure the band plan and adopt new rules, including enabling a high-quality terrestrial complement and backup to GPS for essential PNT services and providing 15 MHz of low-band spectrum for use by mobile broadband networks.

The proposal, according to?, “enables high-quality terrestrial PNT, with the potential for widespread and inexpensive adoption in many use cases because it will use the 5G standard.” Because the company’s NextGen PNT solution uses a small amount of capacity in the 10 MHz downlink, mobile network providers can use most downlink capacity for broadband, “making the spectrum appealing for integration into existing networks and thereby accelerating the availability of terrestrial PNT services.”

According to the filing, “The 15-megahertz band plan is necessary for this broadband deployment, which enables an at-scale PNT network to be deployed efficiently, providing a unique path to resolving the coverage, cost, and user device issues that have prevented broad terrestrial PNT usage to date.”

NextNav recently signed an agreement to acquire spectrum licenses covering an additional 4 MHz in the lower 900 MHz band from Telesaurus Holdings GB and Skybridge Spectrum Foundation. In March 2024, the Superior Court of the State of California, County of Alameda, issued an Order approving the Receiver’s request to sell all of its Lower 900 MHz spectrum holdings to NextNav, allowing the parties to move forward with obtaining FCC approval.

The company plans to partner with mobile network operators or others interested in commercial deployment in the band for 5G and will ensure incumbent operations are protected. According to the company, it has used its existing licenses to develop PNT expertise and products, but, because of a legacy band plan and rules that limit the use of the spectrum for 5G, much of this band is underused.

The NextGen PNT technology and network are designed to use 5G and offer a 3D positioning solution with single-digit accuracy. The positioning solution is available indoors and outdoors and in urban corridors. It also seeks to provide wireless distribution of precise, resilient timing.

The current Lower 900 MHz Band is “not conducive for either terrestrial PNT or mobile broadband,” according to the filing, with shortcomings that include fragmented geographic licensing arrangements, outdated command-and-control requirements and other restrictions. Consolidating the geographically licensed spectrum blocks into a 15MHz nationwide configuration for both PNT and 5G broadband changes. This allows the band to support better use cases and serve as a high-performing complement and backup to GPS.

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Locked Re: 2024Antique Car Run 8/10/2024

 

Another reminder that the 146.91 will be used for the antique car run today until 1:30pm.?


Locked Re: Comms trailer work day 8/10/2024

 

At the cold storage building in front of the Kandi Rescue Squad Building.


Locked Re: Comms trailer work day 8/10/2024

 

Ben, where exactly are we meeting up in the morning?
Thanks,
Dan


On Thu, Aug 1, 2024 at 5:50?PM KF0OUA Leon via <lfuchs82=[email protected]> wrote:
Sign me up!


Locked Re: Willmar HHS site coverage conclusions

 

Mike,
Thank you for all of your work on this. ? And a shoutout to others that helped or are helping ?(Tony, Ben, etc.). ?It is appreciated. ?


Locked Willmar HHS site coverage conclusions

 

The previous map with a roughly 30 mile radius circle from Willmar gives a pretty good representation of a modest station's expectation of Winlink service.
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My test rig is a Toyota Corolla with a Yaesu FTM-200 radio to a mag mount dual band antenna on the trunk with about 3 dBi gain.
I used a laptop computer with a Digirig interface.
I ran 25 watts of power and always faced the back of my car towards Willmar.
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I tried to think like a good Ham when choosing my parking spot.
Publicly accessible and out in the open if possible.
Avoid nearby buildings between you and the other end.
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In an emergency situation not all of this may be possible. Then you do the best you can.
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Home stations with a reasonable outdoor 2m antenna can probably add 10 - 20 miles to the circle, depending on terrain.
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In conclusion, the coverage of this system is all I had dared hope for and more. :)
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73
Mike N0QBH