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Spring is finally coming to the Colorado high country so it was time for a SOTA (Summits on the Air) activation. I don’t know which idea comes first: let’s go hiking or let’s play SOTA. I suppose it doesn’t really matter.

I’ve had my eyes on activating Aspen Ridge, which is near our family cabin but I wasn’t sure if the road was open. It turned out to be an easy Jeep ride down Forest Service Road 185 to get close to the summit. Then a half mile hike around and over the occasional snow patch got Joyce K0JJW and me to the summit.

My portable station was a Yaesu FT-60 handheld and a couple of antennas. Shown above is my dualband Arrow II antenna with only the 2 Meter elements installed, resulting in a 3-element Yagi antenna. My other antenna is an omni-directional MFJ-1714 1/2-wave whip antenna, which is a little easier to handle for general use. Often that is the only antenna I bring along but this time I decided to add a few more dB of signal by using the Yagi. I also take along a Yaesu VX-8GR that pings my location on APRS (www.aprs.fi/k0nr-7).

After a few calls on 146.52 MHz FM, I worked KC8I in Woodland Park. A few minutes later, I caught Steve WG0AT operating from another SOTA peak (Mt Herman, W0/FR-063) for the QRP To The Field contest. A little later, I worked Ted N0ZPX who was fishing at Antero Reservoir, then N0VXE mobile near Salida and Ron N0MQJ in Ranch of the Rockies.

This photo shows the beautiful Collegiate Peaks in the background, with plenty of snow still showing. Needless to say, it is a gorgeous view from Aspen Ridge!

73, Bob K0NR

In the Winter 2013 issue of CQ VHF magazine, I wrote about some of the VHF/UHF handheld radios available from China. In that article, I reported on the measured performance of a few of the Wouxun and Baofeng transceivers. One of the Baofeng UV-5R radios that I tested showed harmonic distortion that was a bit high on the 2 Meter band, around -40 dBc.

I recently got my hands on a Baofeng UV-5RA, which is a newer version of the same radio (firmware BFB297), so I wanted to check its performance. Like the two UV-5R models I checked, the power output, transmit frequency and receiver sensitivity were all quite solid on both bands. I was more interested in the harmonic distortion present in the transmit signal.

On the 2 Meter band, the 2nd harmonic measured -48.4 dB relative to the fundamental which is pretty good. Similar to the other radios I measured, the performance in the 70 cm band is a lot better (-56.1 dB).

This radio has significantly better harmonic distortion than the older UV-5R radio. Of course, this is just a single sample, so performance of other radios may be different.

73, Bob K0NR

This past weekend, I had to great time working the CQ WPX (SSB) Contest. I am pretty much an HF Slacker but I do like getting on the air once in a while for these contests. The attraction seems to be the opportunity to make lots of contacts in a short time and picking up a few new countries. The format for this contest is really fun…multipliers are based on the callsign prefix, so “everyone is DX”…sort of. CQ has an awards program (CQ WPX Award) that is also based on prefixes worked, so the contest is a good way to pursue that award. The ARRL recently added CQ WPX Award support to Logbook of the World, which will help with confirming contacts. Us HF Slackers don’t like messing around with actually sending QSL cards when transferring a few bytes electronically is sufficient.

I operated from our mountain cabin, with just 100W to a trap dipole up in the trees. Not a Big Gun station, especially not in this contest. There were quite a few stations on the Caribbean, many of them contest DXpeditions. Conditions were pretty good on 20M and 15M, with 10M also quite usable during portions of the day.

        Band    QSOs     Pts  WPX
           7      39      69   30 
          14      71     142   59
          21      81     163   54
          28       9      24    6
       Total     200     398  149
       Score : 59,302

The last time I submitted a log for CQ WPX was in 2011 with roughly the same station. That year, I made 98 QSOs for a score of 18,920. So this year’s score is an improvement over that effort.

But the most important thing is to have fun messing around with radios.

73, Bob K0NR

From the That Took A Long Time department, the FCC granted a waiver requested by the ARRL that clarifies the rules concerning the use of TDMA (i.e., MOTOTRBO or DMR) on the ham bands. I posted on this topic way back in March 2011, so refer to that article for the background. Update: ARRL article posted here.

I was surprised to find that the FCC quoted my comments that I filed on this proceeding:

Some commenters state the proposed rule change “removes an ambiguity in Part 97 concerning the use of single slot TDMA technology” and it “enable[s] and encourage[s] the adoption of spectrally efficient narrowband technology.”  Comments of Robert Witte at 1.

OK, fine, it was buried in the footnotes but I appreciate the mention. I can now die in peace knowing that my name is in the FCC record and not associated with a rules violation

Thanks to Jeff K0RM, for pointing this out.

73, Bob K0NR

Here’s another update of interesting important stuff spewing forth from the internet.

The Noise Blankers continue to run amuck on these interwebz, with cutting edge reporting like this: Amateur Radio Club Indicted on Ferritte Trafficking Charges, Special Event Station to Mark Departure of Mother-In-Law, and Man Claims CQ Contest Victory Despite No Contacts. In a related matter, still no word on the status of the Lost Island DX Society (LIDS).

The FISTS CW Club has a web page that measures your callsign weight. The basic idea is that shorter is better, so plug your callsign in and the ham with the lowest score wins! Mine weighs 52, what’s yours?

The ARRL Field Day information is available for download. The logo looks pretty good this year!

Plain Old Telephone Service (POTS) is on the way out.

Lots of new content on HamRadioSchool.com.  Stu W0STU has been discussing the Technician License Question of the Week and I contributed some Shack Talk articles.

And remember, everything on the internet is true because the government is watching it.

73, Bob K0NR

The ARRL web site reported on this Notice of Apparent Liability for Forfeiture from the FCC. That’s government talk for “we are fining you.”

In case you are wondering how you can get fined by the FCC, here’s the sequence of events that resulted in a $10,000 fine for this person:

• Get a Technician License and then let it expire.
• Repeatedly transmit on 14.312 MHz, interfering with licensed radio amateurs.
• Have FCC agents track the signal to your house
• When the FCC agents enter your house to inspect your radio station, leave the transmitter sitting on 14.311 MHz.
• Tell the FCC agents that you will remove the microphone from the transmitter and only use it as a receiver.

Hmmm, why does 14.312 MHz sound like a familiar frequency?

73, Bob K0NR

A few weeks ago, I was at my day job working diligently on something. I popped up the SotaWatch web site to see of anyone was out activating SOTA summits. Sure enough, Steve (AKA Goathiker, AKA WG0AT) was headed up Mt Herman for the day. (I have recently declared Mt Herman to be the Most Radioactive Summit in Colorado…at least for amateur radio.)

When I had a few minutes break, I went out to my amateur-radio equipped SUV in the parking lot to call Steve on 146.52 MHz. Steve came back to my call and we made a quick contact and he was in the log. Even though he was an easy line-of-sight path away, I had trouble copying him. Opening the squelch revealed that I had a large noisy signal sitting on 146.52 MHz. I didn’t think too much of it and assumed it was coming from the vast array of electronic equipment inside the building.

As I left work that day, I tuned to 146.52 MHz to see how quickly the interference disappeared as I drove away. I was surprised to find that the interference did not go away, it was covering a wide area. On my commute home, the noise was remarkably constant. This interference seems to follow me everywhere! Eventually, it sunk in that the interference was coming from my own vehicle. Huh, I didn’t have that problem before.

When I arrived home, I turned off the ignition and the noise was still there. I started disconnecting everything in sight, trying to make the noise disappear. Finally, I unplugged the cute little USB charger/adapter that was inserted into the cigarette lighter socket. Bingo, the interference disappeared. It seems that this little adapter has a switching circuit in it that is generating a large amount of hash. I have not investigated it fully, but it trashes out a substantial portion of the 2 Meter ham band.

It used to be my favorite adapter. Buyer beware.

73, Bob K0NR