ARRL Field Day is upon us, and we are listening carefully to the various planners. The tower trailers are popular in two roles- towers and generators. Beams are a nice add on for station planners and a 30+ foot place to hang a dipole- why not. Light towers have accessory outlets, and 15-20A 120V ACContinue reading “240V AC Power Distribution and Field Day”
The supply of running older used tower trailers at auction continues to be good so I keep adding new ones. Two of the older ones were sold. I am trying to standardize. Every one is 30′ and diesel. Except ONB, which has a quieted down Dual Fuel generator with the Chinese/Indian scooter muffler mod. ThereContinue reading “Fleet Rebalancing”
Locally here, we’re on a multi-day 90 degree or higher weather marathon. So what does that do to electronics, like Rasberry Pi devices in your outdoor tower trailers? Good question…. Well, our batteries are getting pretty well charged in the sun. This time of year, the solar panels can run mesh and small computers 24/7Continue reading “Baking Electronics”
Doug, N0NAS who has been a long time mostly remote collaborator on the tower trailer project gave up trying to convince me to not buy any more of them in March, 2021. The argument was “we don’t use them”- however they get used all the time. They have been to Hams in The Park (+Continue reading “Ham Tower Generator Trailer #13, Tango X-ray (TX)”
Right after the 9/11 attacks in New York and Washington, DC there was an article in the Wall Street Journal about dirty bomb attacks. The idea was bad actors would get their hands on some radioactive material, mix it with conventional explosives. This would cause panic and people to flee, potentially in large numbers. HavingContinue reading “AX.25 Minnesota Statewide Packet Radio 145.670”
Years ago we standardized on Ubiquiti radios for our mesh work. That was a good decision. I prefer 5G vs 2G as it is in our experience far less congested. We picked channel 157. They are lovely, and the older models (use the HP = High Power ones, the really really old ones do not)Continue reading “Amateur Mesh Radios”
We are starting to think about Amateur Radio/ARRL Field Day June 25/26/21. And “asset packages” for MNVOAD deployments. Each of these would call for dual 6KW or more diesel generators parked 50′ away -feeding 240V heavy gauge power cables to distribution points. We have just one 240VAC capable trailer now- and need a second one.Continue reading “Trailer #12 – “Yoda” 2013 Wacker LTN6L”
When you get a tower trailer to use for ham radio, you’re going to get a lot of questions. The number of times most people see a construction tower set up with a Yagi, HF antenna, or some wi-fi dishes on it, are, in the experience of most people, exactly zero. They don’t notice people’sContinue reading “Signage – 15 pieces of “flair””
Back in 2011 we got some money from Dan Skripka and ordered a selection of Ubiquiti mesh hardware for our Lab. We liked the idea of a backbone network on 5 GHz, as 2.4 Ghz has just three non shared channels and was congested. The noise floor on 2.4G with thousands of cell phone carryingContinue reading “A Tale of Two Meshes”
Fifteen or twenty years ago we had a need at the Medtronic Twin Cities Marathon to keep track in real time of the location of hundreds of injured or dropped-out runners across fifteen or so aid stations, a fleet of busses and a 40×80 foot hospital tent. This expanded to include a fleet of medicalContinue reading “D-Star and Reflector 53”
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