As soon as we got back from our trip I started ordering things for the coming Airstream maintenance and upgrades. So beginning on Friday, interesting boxes have been arriving at our doorstop. Many more are due this coming week.
The first package contained a new cabin air filter for the GL320. That dust storm really got into everything, and so I decided I’d change the cabin air filters and check the engine air filters. They were all better than I expected but the cabin air filter was definitely due because it wasn’t changed at the last service.
Today’s package contained my new wireless Internet kit. As I mentioned, our Cradlepoint CTR500 has been obsoleted by the manufacturer and isn’t reliable with the new 4G networks, and the roof antenna on the Airstream goes back to the 2G days (and isn’t compatible with the frequencies Verizon uses today for 4G LTE, which are in the 700 MHz band). Plus, I got tired of not being able to get online in fringe areas, especially when everyone else seemed to be getting along fine. Turns out they are all using “boosters,” and so I finally broke down and got one, along with everything else.
I spent about 20 minutes on the phone with Vanessa from the 3G Store to work through the technology needs and make sure everything I was going to order would be compatible.  I already had the core of the system, a Verizon wireless data card capable of using the new 4G LTE network (specifically, a Pantech UML-290). The bottom line for everything else was about $360, including:
- Cradlepoint MBR-95 wireless router. This is the device that takes the signal from the Pantech UML-290 and makes a private wireless hotspot that all our devices can use.
 - Wilson Sleek 4G-V signal booster cradle (thanks to Jay & Cherie for the tip). This amplifies the signal from any device you put into the cradle, 3G or 4G. It’s really designed for car use but will work fine for our purposes. The Pantech will get strapped into the cradle with a rubber band.
 - SureCall omnidirectional fiberglass antenna with ten feet of low-loss cable, and an adapter to connect to the Sleek. This antenna is a bit of a monster, 9.5 inches tall and about 3.5 inches wide at the base. It’s much larger than the antenna it is replacing (which was the size of a shot glass) but hopefully offers better performance too. The specs call for a 2-3 dB gain.
 
All of this stuff will get wired up in the cabinet that we have reserved for electronics and DVDs, near the TV set. I’ve already got a 12v connector that fits the Cradlepoint, leftover from a previous installation, and a 12 volt socket which will take the cigarette lighter adapter for the Sleek, so we’re all set for power.
The antenna will be mounted to the side of an aluminum leg of one of the solar panels. Clearance is a challenge: I bought this 9.5″ antenna because the Wilson RV antenna that most people use is 18 inches tall and won’t clear the entryway of our carport. This one will just barely make it. It will be interesting to watch as it comes out of the carport the first time. If I’ve miscalculated, we might lose a Spanish tile or two in the process.
Before going to all the trouble of running the new antenna wire and putting mounting screws in place, I hooked up the full kit in the house, and dropped the antenna out the window. After the usual firmware upgrade and some configuration, the first test, using only the Pantech without the Sleek booster, yielded a good signal of -69 dBm, which is not surprising since we are in a city. Then I put the Pantech card into the Sleek cradle, which boosted the signal and sent it out to the external antenna, and as I watched the signal improve to -43 dBm. That’s a really good increase, and better than what Wilson promised for the Sleek booster with its standard antenna.
The actual installation will be in the next few days. I’m looking locally for the appropriate polyurethane caulk (Sikaflex 221, Vulkem/TremPro 635, or similar) to seal up the antenna wire where it passes through the aluminum, and so far am striking out. I can order an $8 tube of it with $10 shipping from many places, but that’s annoying so I’m trying to find an acceptable substitute in Tucson. I suppose I can always go over to the local RV store and get something that will work, but in the past the “white box” caulks they tend to sell have been disappointing. They just don’t last, and I’d rather not have to get up on the roof next year to do this job again.
The real test of this new gear will be this summer when the Airstream is in Vermont. Reception at our parking spot has always been marginal, to the point that I have to borrow a friend’s office to get work done efficiently. It would be nice to be able to work from the Airstream as I’m accustomed to doing. And when we are traveling, it looks like the addition of the big antenna and booster will help me get online in more places, and I’m all for that.
Andy Thomson at Can-Am RV helped me out with this one when we bought our Mercedes GL320 in 2009, and I’ve passed on the knowledge many times since then.  His solution is the best one, I think: just wire in some incandescent lights into the system.  (You could use resistors but light bulbs are easy to mount, and easy to find and replace on the road if needed.)  Andy uses the clearance lights that were found on older Airstreams, because they have two bulbs.  If one goes, there is some redundancy and you can swap a bulb from another light for a while.
This solution is really easy for the DIY’er to install.  You just wire the lights into the relevant circuits.  The easiest place to do this is in the “rats nest” of wiring where the 7-way connector enters the trailer. This is usually in the front closet or under the front sofa, or behind an access panel in the front storage compartment, on the street side of the trailer.  (The diagram above is by Andy Thomson of Can-Am RV.)
But really it wasn’t a big deal for us.  The Dairy Queen next door was shut down for lack of power, but we were in a rolling emergency shelter.  We had a full tank of fresh water (as we always do when traveling), empty black & gray, a refrigerator full of food, lots of battery power, solar panels, Internet, phone, movies, etc.  What did we need?  We were entirely comfortable and could have stayed there for days if we needed to.  So there was not much stress involved, other than making sure the Airstream didn’t get hit by a rolling object in the parking lot.



The camping area is beautiful, reminiscent of the Squaw Flat campground in the Needles district of Canyonlands NP, but with one important difference.  The state park prohibits climbing on the rocks, except in a few designated areas.
OK, so no more hikes, no climbing on rocks, and also no cell phone service.  This meant no blog, no work (yippee!), and enforced downtime.  I spent a lot of time just sleeping, eight or nine hours a night and a big nap in the afternoon.  At one point Eleanor looked around at the scenery, and me uncharacteristically lying in bed with a book, and said, “Shouldn’t we be doing something?”
Saturday night Mary made what I thought of as “Farewell Brownies,” since they were the last meal we would share together.  It has been a good three weeks with them, camping at our house and traveling together.  There aren’t many people with kids who we could last three weeks with.  We made tentative plans to cross paths again next February, when they will be coming to