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My June VHF Contest operation was at the cabin DM78av, operating in the new 3-band single-op category this year. Usually, I have been a two-band guy just focusing on 2M and 6M. I drug along my 432 MHz antenna and drove it with 50W from my FT-847, picking up a few more QSOs that way.

My score is down from the previous two years, which I think relates to the 50 MHz propagation. I subscribe to the theory that any June contest that has any sporadic-e is a success, so I am not going to complain. However, it did seem like I spend more time digging weak signals out of the noise on 6 Meters this year. It was often just barely open and the QSO rate was slow.

Best DX was XE2WK in EL03 on 50 MHz.

73, Bob K0NR

2013 ARRL June QSO Party K0NR DM78

Band QSOs X pt = QSO pts. X Grids = Points
 ---------------------------------------------------------------
 50 320 1 320 112 35840
 144 34 1 34 11 374
 432 13 2 26 6 156
 ---------------------------------------------------------------
 TOTALS 367 380 129 49020

Claimed score = 49020

This certificate for the CQ Worldwide VHF Contest arrived in the mail today, 1st Place Single Operator All Band for Colorado. Most of these contest awards take so long to arrive, I have usually forgotten all about the contest by the time they show up in the mail.

Last year, I had a pretty good run at it with an excellent 50 MHz sporadic-e opening on Saturday that ran up the QSO and grid totals. See my previous report on the contest here.

   73, Bob K0NR

“The Wilderness Protocol” (ref. June 1996 QST, page 85), recommends that stations (fixed, portable or mobile) monitor the primary (and secondary if possible) frequency(s) every three hours starting at 7 AM local time, for five minutes (7:00-7:05 AM, 10:00-10:05 AM, etc.)  Additionally, stations that have sufficient power resources should monitor for five minutes starting at the top of every hour, or even continuously.” The primary frequency is the National Simplex Calling Frequency…146.52 MHz. The secondary frequencies are 446.0, 223.5, 52.525 and 1294.5 MHz.

Here in Colorado, the summer months mean that many people head for the mountains. Mobile phone coverage has improved in many parts of the high country but is still not reliable in all areas. Amateur radio VHF/UHF repeater coverage is extensive but also does not cover the entire state.

The Wilderness Protocol is a good idea but is overly complex for practical use. Here’s my proposal to make it much simpler for practical backcountry use:

Principle #1: Don’t ever rely on a radio or mobile phone to get you out of trouble in the backcountry. Your primary strategy must be self-sufficiency. Avoid trouble. Be prepared for the unexpected.

Principle #2: Know what repeaters are available in your area. We have many wide coverage repeaters available but you need to know the frequency, offset and CTCSS tone (if any). The Colorado Connection is a linked repeater system that covers  many remote parts of the state.

Principle #3: In remote areas, monitor 146.52 MHz as much as possible. This applies to backcountry travelers, mobile stations and fixed stations.

I’ve been making it a habit to monitor 146.52 MHz in the backcountry. I often come across hikers, campers, fisherman, 4WD enthusiasts, SOTA stations, mobile operators and others monitoring that frequency.  It is fun to chat with other radio amateurs having fun in the mountains.

Just my opinion.
73, Bob K0NR

Note: This is a repost of an older article with minor edits.

I made it to the Dayton Hamvention this year, after a multi-year absence. Due to that four-letter word known as work, I was not able to arrive until really late Friday night. That left all day Saturday and the half day on Sunday to partake of the event.

Bob K0NR discovers the cover photo for the spring CQ VHF

I’ll start with the obligatory dig at Hara Arena, repeating my tweet:

Hara Arena continues to be everything that I wish it wasn’t.

Check out the posts by Jeff KE9V and Steve K9ZW about their impressions of Hamvention.

I spent some time helping out at the HamRadioSchool.com booth in the north hall. Wow, what a positive response we got from that effort. Stu W0STU’s Technician and General Class books have really hit their mark, finding a good balance between covering the material to pass the FCC exams while also helping students to really get it. We heard quite a few instructors stop by and say “This is what I have been looking for!” If you are teaching a ham radio licensing class, you need to check out the HamRadioSchool.com books….and the companion web site and iOS apps.

One of the high points of the weekend was discovering the poster-size front cover of Spring 2013 CQ VHF with my mountaintop photo on it.  Joyce K0JJW took a great shot of me operating from Mt Sneffels last August (Colorado 14er Event and SOTA), so it was an excellent complement to my article: “A Little Mountaintop Operation”.

So I leave Dayton, thinking about the highs and lows for the weekend. There was not much new that really caught my attention. (Disclaimer: I am sure I didn’t see everything there.) I am still looking for an FT-950 with 2 Meters, an Android HT and a D-STAR radio from Kenwood, Yaesu or even Alinco. Also, there is a real trend of vaporware instead of products. I’ve gotten really jaded about this. If a company can’t quote price and delivery, then it doesn’t exist in my world.

As K9ZW pointed out, much of the fun of Dayton is being with great people: some old friends (like my bud Denny KB9DPF) and some new ones, too.

How was your Hamvention?

73, Bob K0NR

When I purchased my 2003 Ford Escape, I decided to install multiple ham radios and a bunch of antennas. Mostly I use a Yaesu FT-8900 FM transceiver for operating on the 2-Meter and 70-cm ham bands. A while back, I started getting reports that I had alternator whine on my transmit audio. I was perplexed because I thought I had done a pretty darn good job of installing the radio, including connecting heavy 12V power cables directly to the battery. (See K0BG’s web page for more information on battery connections.) I really wasn’t sure if this was a day one problem (and no one ever told me about the crummy audio) or something that had just started. My first course of action was to ignore it and see if it goes away. This strategy failed miserably as my FCC-licensed spouse continued to report that I was “whining”. Finally, I decided to put my alleged knowledge of electricity to work. I got out my trusty oscilloscope and took a look at the voltage near the transceiver. There was about 800 mV of ripple on the DC voltage, as shown below.

The frequency of the ripple was in the audio range, consistent with alternator whine. The frequency of the ripple increased when I rev’d the car engine, so it was clearly coming from the alternator. I was surprised to find that the size of the ripple did not depend much on whether I was transmitting or not. The transmit current is much higher than the receive current, so I expected the ripple to be worse on transmit.

Then I decided to measure the ripple voltage right at the battery, which is shown below. The peak-to-peak ripple is smaller (about 400 mV) than at the radio but still present. I expected the the voltage to be mostly clean right at the battery.

I pondered what to do next. One approach would be to install a filter to eliminate the ripple. However, filtering out a few hundred Hz signal while maintaining a low voltage drop on the 12V power feed is not trivial. More importantly, I had the sense that the Escape’s electrical system was just not operating properly. I decided to take it to my local mechanic, who tested the alternator and determined that a diode had failed. He replaced the alternator for me and the whine is now gone.

I did measure the 12 volt supply with the new alternator installed and the radio transmitting. I was surprised to find that there is still some ripple, a bit less than 200 mV (shown below). Apparently, this is not enough to disturb the FT-8900 signal.

So that’s the story about my alternator whine.

My spouse says “I still whine sometimes” but it has nothing to do with my ham transceiver.

    – 73, Bob K0NR

HamRadioSchool.com is off to a great start with a learning system that includes a web site, iPhone app and a great Technician License Course book. The Technician book, written by my fellow instructor Stu Turner W0STU, has turned out to be very popular. Stu did a great job of balancing “teaching the right material” with “focusing on the exam questions.” We’ve used the book in our two-day Tech license class with great success.

Many people have been asking Stu when he’s going to write a book for the FCC General Class License. So, by popular demand, here it is: HamRadioSchool.com General License Course. Using the same creative style that worked well with the Technician book, Stu has delivered an easy-t0-grok book for getting your General Class License.

I was happy to provide technical assistance to Stu for this book and earned the esteemed title of Technical Editor.  It even says so on the front cover! (It says Technical Editor because I can’t be held responsible for proper grammar or spelling.)

Just like the Tech book, the General book has a companion iPhone app available on iTunes.

73, Bob K0NR

It is about time I updated one of my more popular posts, The Incomplete List of Ham Radio iPhone Apps from 2011. This was a challenging task back then and has gotten more difficult as the number of ham radio apps for the iPhone has greatly expanded. Still, I will give it a shot and appreciate your feedback to make the list better. I am only evaluating iPhone apps, not iPad apps, since I don’t use an iPad.

In general, I will focus on free or low cost (less than $5) apps that I am actively using.

From the Simple Utility Category:

 Maidenhead Converter (Author: Donald Hays, Cost: Free) Handy app that displays your grid locator, uses maps and does lat/lon to grid locator conversions.

Ham Radio Handbook (Author: Antonis Miliarakis Cost: Free) This app provides some basic ham radio info: Q Signals, Country Prefixes, Band Plans and RST signal reporting.

UTC Time (Author: Michael Wells, Cost: Free) A simple app that displays UTC time and local time.

Ham I Am (Author: Storke Brothers, Cost: Free) A handy app that covers some basic amateur radio reference material (Phonetic alphabet, Q Signals, Ham Jargon, Morse Code, RST System, etc.) Although I find the name to be silly, I like the app!

There are quite a few good apps for looking up amateur radio callsigns.

CallBook (Author: Dog Park Software, Cost: $1.99) Simple ham radio callbook lookup with map display.

Call Sign Lookup (Author: Technivations, Cost: $0.99) Another simple ham radio callsign lookup with map display.

CallSigns (Author: David Fleming W4SMT, Cost: $1.99) This is my favorite ham radio callsign lookup. The features are not much different than the others I have listed but the graphics are nicer and the user interface a little cleaner. I am sure this is mostly personal preference.

There are a few repeater directory apps out there:

iHAM Repeater Database (Author: Garry Gerossie, Cost: $4.99) Geolocation repeater directory. This seems to work well.

RepeaterBook (Author: ZBM2 Software, Cost: Free) I’ve only used this one a bit but it seems to work well and its free.

If you are an EchoLink user, then you’ll want this app:

EchoLink (Author: Synergenics, Cost: Free) The EchoLink app for the iPhone.

There are quite a few APRS apps out there. I tend to use these as my needs are pretty simple….just track me, baby!

iBCNU (Author: Luceon, Cost: $1.99) The first APRS app I was able to get running. It just turned on and worked. It integrates the aprs.fi mapping into the app, so it is easy to use. I recommend this one for most casual APRS users.

Ham Tracker (Author: Kram, Cost: $2.99) APRS app, works OK, uses external maps such as Google and aprs.fi. “Share” feature allows you to send an SMS or email with your location information.

Satellite tracking is another useful app for a smartphone:

ISS Lite (Author: Craig Vosburgh, Cost: Free) A free satellite tracking app for just the International Space Station. It has annoying ads but its free.

ProSat Satellite Tracker (Author: Craig Vosburgh, Cost: $9.99) This app is by the same author as ISS Lite, but is the full-featured “pro” version. Although it is a pricey compared to other apps, I recommend it.

For Summits On The Air (SOTA) activity, there are a few apps:

Pocket SOTA (Author: Pignology, Cost: Free) A free app for finding SOTA summits, checking spots and accessing other information.

SOTA Goat (Author: Rockwell Schrock, Cost: $4.99) This is a great app for SOTA activity. It works better when offline than Pocket SOTA (which often happens when you are activating a summit).

For Technician License training, I like the HamRadioSchool.com app. (OK, I am biased here as I contribute to that web site.)

HamRadioSchool (Author: Peak Programming, Cost: $2.99) There are a lot of Technician practice exams out there but this is the best one, especially if you use the HamRadioSchool license book. They also just released the General practice exam, too.

For a mobile logbook:

HamLog (Author: Pignology, Cost: $0.99) I am not too keen on the idea of keeping a log on an iPhone, but it does come in handy once in a while. More importantly, HamLog includes a bunch of handy tools including UTC Clock, Callsign Lookup, Prefix list, Band Plans, Grid Calculator, Solar Data, SOTA Watch, Q Signals and much more.

Well, that’s my list. Any other suggestions?