Posts Tagged ‘VHF’
NPOTA: Grand Teton, Yellowstone and Rocky Mountain
To celebrate the 100th anniversary of the National Parks Service, the ARRL is sponsoring National Parks On The Air (NPOTA) during 2016. Joyce KØJJW and I happened to have a trip planned to visit several of the National Parks, so it was great opportunity to take along some radio gear and operate portable from the parks.
First stop was the Grand Teton National Park (NP23) in Wyoming. I operated from Signal Mountain, which is also a Summits On The Air (SOTA) peak. See my previous blog posting: SOTA plus NPOTA on Signal Mountain.
We continued on to Yellowstone NP (NP57), where we saw lots of wildlife: buffalo, elk, deer, bear and antelope. (Click on any of the photos to get a larger image.)
As described in the Signal Mountain post, my portable station was a Yaesu FT-991 driving an end-fed halfwave antenna on 20m. I used a SOTABEAMS pole to support the antenna, lashing the pole to whatever posts I found available. It was not too difficult to find a suitable parking spot close to mounting post. I was prepared to operate on other bands but 20m seemed to be the best choice based on current band conditions. I made 48 contacts on 20m ssb in about 30 minutes.
As we headed back home to Colorado, we visited Rocky Mountain National Park (NP48). We entered the park from the west side and crossed over to the east entrance via Trail Ridge Road. Love that drive! But first we stopped on the west side to do another NPOTA activation. Again, 20m phone was the operating mode and I made 33 contacts with stations across the US and Canada.
We took our time leaving the park around dusk so that we could spot some elk. The strategy paid off as we saw more than 20 elk in various locations.
Our top priority was enjoying the parks and viewing wildlife so we did not spend a huge amount of time doing NPOTA activations. Still, we activated three of our favorite National Parks, making 121 QSOs. We also worked in two SOTA activations on the trip as a bonus. All in all, it was a great trip with some fun ham radio activity included.
The SOTA and NPOTA logs have all been submitted (SOTA database and Logbook of The World, respectively.)
73, Bob K0NR
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SOTA plus NPOTA on Signal Mountain (W7Y/TT-161)
Signal Mountain (W7Y/TT-161) is now my favorite spot in the Grand Teton National Park. The summit is well-marked on the Grand Teton NP map, on the east side of Jackson Lake. It has a paved road to the top and it provides excellent views of Jackson Hole and the surrounding mountains. Oh, and it’s a great location for ham radio.
On this summit, I did a combination Summits On The Air (SOTA) and National Parks On the Air (NPOTA) activation. Well, sort of. It turns out that when I packed for the trip, I included my usual SOTA gear, which is all VHF. For NPOTA, I loaded up my HF DXpedition gear that needs a pretty hefty power source. These means that the HF stuff uses my car battery, so it is not SOTA-compliant. Oh well.
For the SOTA activation, I used the Yaesu FT-1DR and my 3-element Arrow yagi antenna to work a handful of stations on 146.52 MHz. I was a little concerned about finding enough stations listening on 52, but once again a little bit of patience payed off and I made my four QSOs.
Then I set up the NPOTA station to activate Grand Teton National Park (NP23). My equipment was a Yaesu FT-991 driving an end-fed half-wave for 20m from LNR Precision. I’ve tried a number of different portable antennas over the years but have found that a half-wave radiator up in the air is a pretty effective antenna. This could be a center-fed dipole antenna but that can be a challenge to support, depending on the physical location.
The end-fed half-waves (EFHW) from LNR Precision are easily supported using a non-conductive pole such as the 10m SOTABEAMS pole. The top two sections of the pole are too thin to support much of antenna, so I have removed them. This makes my pole about 9 meters in length which is still long enough to support a 20m halfwave. (The antenna angles out a bit as shown in the photo but its pretty much vertical.) I attached the pole to a fence post using some hook/loop straps. I don’t fiddle with the length of the antenna, I just let the antenna tuner in the FT-991 trim up the match. This is the same configuration I used in Antigua (V29RW), where it worked great.
The FT-991 is a great little radio for this kind of operation. The SUV we were driving is not set up for HF operation so I just located the radio in the back of the vehicle and plopped down on a folding camp chair. For power, I clipped directly onto the vehicle battery with fused 10 gauge wires.
I started by making a few calls on 20m ssb. As soon as I was “spotted” on the usual web sites, I had a good pileup going. I worked 40 stations in about 40 minutes, so averaged one QSO per minute overall. Thanks to everyone that worked me; all contacts have been uploaded to Logbook of The World.
Oh, and it was a lot of fun.
73, Bob K0NR
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Slacker SOTA Activation in the Tetons (W7Y/TT-061)
The Grand Teton National Park has plenty of mountains for Summits On The Air (SOTA) activations, so I wanted to activate a few of them as we enjoyed the park. I am still recovering from a fractured ankle, so I was definitely looking for an easy-peasy summit to activate on our trip. It turns out there is a summit right at the top of the Jackson Hole Arial Tram that operates during the summer months (W7Y/TT-061). (This tram serves the ski area during the winter.)
The SOTA database shows this summit as unnamed and refers to it by elevation, 10450. The locals may refer to this as Rendezvous Mountain, not to be confused with Rendezvous Peak (W7Y/TT-035). For SOTA purposes its just “10450”.
Well, this sounds pretty awesome…ride the tram to the top and play ham radio. Now the bad news: the ticket for the tram is $42. It’s an all day pass that gives you access to other lifts and plenty of hiking trails but still it is expensive. OK, slightly better news: if you purchase online you can get the pass for $32. There are senior and other pricing options, so check out the web site for the latest info.
The September weather was overcast and cold at the summit. I opted for a simple VHF activation using my Yaesu FT-1DR and a half-wave vertical antenna. I had my 3-element 2m yagi with me but I didn’t deploy it. I figured that my ability to contact folks on 2m fm would be limited more by who happens to be monitoring…signal strength would not be a major factor.
It was cold at the top and I was glad that I packed my gloves, hat and a decent jacket. I made five contacts by calling on 146.52 MHz.
The tram ride was quite enjoyable with good views of the Jackson Hole area. However, this may go down in history as my most expensive SOTA activation.
73, Bob K0NR
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Monarch Ridge South SOTA Activation (W0C/SP-058)
For the 2016 Colorado 14er Event, I had to choose really easy SOTA summits to activate because I had fractured my ankle earlier in the summer. At this point, I was able to hobble around with a protective boot but walking more than a few hundred feet was difficult. On Saturday, we drove up Pikes Peak and took a short stroll away from the vehicle to operate. On Sunday, we decided to activate Monarch Ridge South (W0C/SP-058), using the sight-seeing tram that goes to the top.
Access is right off Monarch Pass (Hwy 50), where there is a large parking lot. There is a trail that goes to the top and we’ll be back to hike that some other time. (Actually, Joyce K0JJW and I already tried to snowshoe to the top in blizzard conditions but that is another story for another day.) The trail is a popular mountain bike route, so we saw lots of bikers in the parking lot unloading gear. Monarch Pass is oriented north/south and the trail heads off to the east (behind the tram building).
The tram boarding location is inside this building at the bottom of the tram. We purchased tickets in the nearby gift shop, which is worth a look if you need a map, book, ice cream cone or trinkets. See their website for latest schedule and pricing.
Here’s a photo of the tram going up the side of the mountain. Of course, the views are great and the ride takes about 10 minutes. The tram car holds four people and a reasonable amount of SOTA gear.
At the top, Denny KB9DPF made contacts on 2m FM, aided by expert logger Kathy KB9GVC. The actual summit is a ways to the south of the tram, maybe a tenth of a mile, but we operated from a concrete pad on the north side. The ridge is flat and we judged the activation area to be very large.
We made a total of 13 contacts on 2m and 70cm, including 5 other SOTA summits (S2S).
I used my Yaesu FT-817 on 432.100 MHz SSB, hoping to find someone in the UHF contest that is happening concurrently with the 14er event. I didn’t work anyone on 70cm SSB but I did work K3ILC in Colorado Springs on FM at a distance of ~90 miles. Not too bad. The Arrow antenna is attached to my hiking stick via the camera mount thread.
There is a substantial radio site on Monarch Ridge that did provide some RF interference to us on 2 meters. The 70 cm band seemed to be unaffected but I can’t be sure. The “bad boy” transmitter is the KMYP automated weather station (AWOS) transmitting continuously on 124.175 MHz. Well, at least we could receive current weather information. We did relocate to put some distance between us and the transmitters but my lack of mobility kept us from going too far.
If you are looking for an easy access SOTA summit near Monarch Pass with excellent views, this is it. The hike up should not be very difficult but the tram makes it even easier. If you plan to operate 2 meters, expect some interference. Next time, I’ll try locating even further away from the transmitter site. I might even bring along some bandpass filters. Other SOTA enthusiasts have reported no problems on the HF bands.
At the time of this post, there are plans to put a 2m amateur repeater at this site on 145.325 MHz.
73, Bob K0NR
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What’s In Your Rubber Duck?
Anyone with a VHF or UHF handheld transceiver (HT) probably uses the standard “rubber duck” antenna for casual use. I often refer to the rubber duck as The World’s Most Convenient Crappy Antenna. To be fair, all antennas are a compromise…the rubber duck optimizes small size and convenience at the expense of performance. The Wikipedia entry describes the rubber duck antenna as “an electrically short monopole antenna…[that] consists of a springy wire in the shape of a narrow helix, sealed in a rubber or plastic jacket to protect the antenna.“
Being curious about what really is hiding inside the typical rubber duck antenna, I decided to take a few of them apart. I did not try to assess the performance of the antennas but just examine their construction.
Baofeng UV-5R Stock Antenna
I started by dissecting a Baofeng UV-5R antenna, which took some aggressive action with a diagonal wire cutters to split the rubberized jacket near the bottom. After that, the jacket slid off to reveal the classic spiral antenna element inside. You can see some white adhesive near the top of the spiral element (upper right in the photo).
The Baofeng antenna had a female SMA connector.
Note: You can access high resolution versions of the photos in this article by clicking on them, allowing you to see lots of detail.
Yaesu FT-1DR Stock Antenna
The Yaesu antenna was easy to disassemble. In fact, I chose this antenna because I noticed that the outside jacket had come loose and was starting to slide off the antenna. A steady pull on the cover exposed the antenna elements without any further antenna abuse. (I plan to reinstall the cover with a few dabs of glue and expect that it will continue to work fine.)
The construction of this antenna is quite different from the Baofeng. The main element is a very tightly-wound spring…so tight that I expect that it acts like a solid wire electrically. In other words, it doesn’t have the spiral configuration that makes the antenna act longer electrically. At the bottom of the antenna, there is a coil inserted in series with the radiating element (connects radiating element with the center pin of the SMA connector).
The photo to the right shows a closeup view of the male SMA connector and the coil.
Laird VHF Antenna
Next, I wondered if antennas for commercial radios had different design or construction techniques. Laird makes high-quality antennas for the mobile radio and other commercial markets, so I purchased one of their VHF rubber duck antennas to dissect. This model is intended for use with Motorola radios requiring a threaded antenna stud.
This antenna was a challenge to cut open. I used a sharp knife and diagonal pliers to cut the rubberized jacket and peeled it back using a needle-nose pliers. The rubberized coating was embedded into the spiral antenna element, so it did not come apart easily. It took over an hour fighting with the antenna and I gave up before getting the entire spiral element exposed.
The Laird antenna is clearly the sturdiest of the three antennas. The spiral element is much thicker than the Baofeng and the rubberized coating is tougher and molded tightly into the spiral element.
The Baofeng and Laird antennas use the same design concept…just take a spiral antenna element and apply a protective cover. However, the Laird construction was far superior, but not a surprise given that Baofeng is a low-cost provider in the ham radio (consumer) market.
My disappointment is with the Yaesu antenna. The antenna came apart after one year of not very heavy use. I expect I can put it back together with some adhesive, improving on the design in the process.
Anyway, I found this interesting and wanted to share it with you. What’s in your rubber duck?
73, Bob KØNR
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All VHF Shack Sloth
On June 21st, I worked Steve K7PX on Mount Garfield (W0C/FR-040) using 2m fm to push me over 1000 points to quality for the SOTA Shack Sloth Award using only VHF. This is my first significant SOTA award, which I have been working towards for several years now. I decided to pursue Shack Sloth using only the VHF bands, which is much more difficult than using HF. Why? Something about mountains, Height Above Average Terrain (HAAT) and VHF radio has always intrigued me.
Here’s the line up of my top chased summits, with Mt Herman and Pikes Peak taking the clear lead. Mt Herman is The Most Radio-Active Mountain in Colorado and it is in my backyard. Most of those contacts were with Steve WGØAT and Frank KØJQZ. Thanks, guys! Pikes Peak is also a clear VHF shot from my house and many SOTA activators and tourists like to activate that summit. No surprise, the rest of the summits are various peaks in Colorado, worked from my house or from our cabin near Trout Creek Pass. Quite a few of these are Summit-to-Summit contacts made when activating peaks, often during the Colorado 14er Event.
Most of my thousand points were contacts made using plain old 2m fm, The Utility Mode. A few contacts were made on 2m ssb along with some 70 cm fm and ssb contacts. I have been encouraging folks to try 2m ssb for huge improvements in weak-signal performance but the universal nature of 2m fm seems to be winning out.
My next goal is Mountain Goat with VHF only. I’ll need to activate a lot of summits to get that done, so it will take me a while. It’s always good to have something to work towards.
73, Bob KØNR
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How About an Updated FT-817?
The Elecraft KX2 made a big splash with QRP enthusiasts at the Dayton Hamvention this year. HamRadio360 had some good coverage of the product introduction. Basically, the KX2 is a shrunken version of the KX3, covering the HF bands 80m through 10m.
There were rumors circulating that Yaesu would introduce a replacement for the FT-817ND, but that turned out to not be true. It is a good rumor because the original FT-817 was introduced way back in 2001 (according to Wikipedia). Also, Chris Wilson NØCSW was actively soliciting inputs for an 817 replacement at the Central States VHF Conference last summer.
A while back, I did a comparison of the FT-817 and the KX3 (big brother to the KX2). I evaluated the two radios from a VHF/UHF point of view. The FT-817 is the only portable single-radio solution for 50 MHz, 144 MHz and 432 MHz. The KX3 includes 50 MHz standard and 144 MHz is an option. The KX2 leaves out the VHF bands completely to achieve a smaller size.
What’s Next for the FT-817?
Its always fun to speculate on what might be coming in new gear. I expect Yaesu will maintain its position as the QRP transceiver that covers HF/VHF/UHF. It has a long history of delivering cost-effective “do everything” radios. We can look to recent product introductions from Yaesu to get a hint of what might be coming.
The FT-2DR, FT-400DR and FT-991 have all adopted larger touch-screen displays so we can probably expect that for the 817 replacement. However, this will challenge the existing form factor…you can’t just drop a larger display into the existing 817 design. The three newer radios include the System Fusion C4FM digital mode…at this point, I don’t think Yaesu would introduce a VHF/UHF radio without it.
Which raises another question: will the new radio also include a GPS receiver? This capability is a good complement to the C4FM mode in a portable radio. The FT-991 requires you to enter your location manually, which the FT-2DR and FT-400DR use a built-in GPS. But it adds circuitry and complexity so I am going to guess they will leave that out.
I am expecting (hoping?) Yaesu will improve the battery life of the transceiver. (Receive standby current is spec’d at 450 mA.) Even if they don’t improve the current drain, newer battery technology could be used to improve operating time. Also, depending on the form factor changes, it may be wise to dedicate more space for a physically larger battery.
Yaesu will probably improve the overall receiver performance, including advanced DSP features. Many 817 users have complained about the lack of coverage of 162 MHz weather radio in the US. On the transmit side, a little more output power would be nice…maybe match the KX3’s 10 watts on HF. Yaesu could really make the VHF crowd happy (in the US) if they included the 222 MHz band.
Take One Tablet
The radio will surely have a computer I/O port with USB being the most flexible choice. There is an opportunity to innovate a bit here by coupling the radio with Android and iOS tablets. I could see a really nice app that handles logging, CW, PSK31, RTTY, bandscope, and other advanced features. This could take the pressure off having a larger display and loading tons of features into the radio. The most convenient I/O would be wireless, most likely Bluetooth or maybe WiFi. Many of the SOTA and QRP operators already take along a smartphone or tablet for logging and other tasks, so it would be a good fit to that market. The key to this idea is careful human factors design and tight integration with the radio. Do I expect this from Yaesu? Not really. So surprise me and knock my socks off.
Those are my thoughts. Your turn.
73, Bob KØNR
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