I guess it works – but not the best design!

I had a little more trouble when I went to the Jeep on Friday for my lunchtime QRP session.  I just wasn’t hearing anything!  I know the bands can get that way, but the past few days had been relatively decent.  Like any other Ham Radio operator, my mind immediately went to “There’s something wrong with the radio!”

As I disconnected the coax from the KX3, I noticed that the radio’s BNC post turned a little bit as I removed the coax fitting.  I knew that by itself wasn’t the problem, but I didn’t like the fact that it was a tad loose.  I broke out the tools and did some field surgery on my KX3 right in the back of the Jeep!  I felt like Hawkeye Pierce, BJ Hunnicut or Trapper John from MASH.  I opened the KX3, removed the auto tuner board, and with a pair of needle nose pliers, I snugged up the nut that holds the BNC post against the inside housing of the radio. Then I put everything back together and turned the radio back on ….. still nothing.

I just recently replaced the PL259, so I twiddled that around, thinking that perhaps I didn’t do as good an installation as I had thought.  Nope, no difference – that wasn’t the problem either.  So even though I had taken the magmount assembly apart the previous night, I decided to look again there – a mistake on my part there? Once again, all was good there.  But I did notice that as I twirled the cable around, I was getting signals to appear, disappear and then re-appear. A break in the coax cable!

So I brought the magmount back in the house once again.  I decided that I was going to take it apart, cut back about 8 inches of coax and then put it all back together.  In the process of taking everything apart again, I just happened to pull on the center conductor of the cable and a six inch piece came out with my fingers.  It had indeed broken, back in the main part of the cable, and my plan to cut it back by a foot and reassemble turned out to be a good plan.

But I have to tell you, after working on this, I’m not really impressed with the design of this magmount. I hope you can figure out what I’m trying to describe.  The coax goes into a plastic housing. This plastic housing is roughly the diameter of a quarter and is maybe a 1/4 inch thick.  Each half has a hole.  The shield of the coax (which has been pigtailed) goes through the bottom hole, while the center conductor (which is kind of flimsy) goes through the upper hole. There are channels or depressions on each side for the wire to sit.

The is the order in which it all goes back together – from the bottom working towards the top.

1) Through bolt
2) Plastic insulator, so that the through bolt does not touch the magmount body (ground).
3) Magmount body
4) Coax housing with the braid sandwiched down, between the coax housing and the magmount body.
5) Metal washer.  The center conductor lays in a channel and is pointing up, to be sandwiched between the coax housing and the washer.
5) Threaded hex sleeve for the radiator.

Everything is held in place by the holding pressure created by screwing the through bolt into the threaded hex sleeve!  The center conductor is NOT soldered or otherwise electrically connected to the metal washer underneath the threaded hex sleeve, as I had previously thought.  And as I noted before, the braid is simply sandwiched between the plastic coax sleeve and the magmount body.  I made sure all metal surfaces were clean and shiny and used plenty of Deoxit to help ensure good electrical contact (there really are no true connections!) as best possible.

It seems to me that it would have been better for the coax to be soldered or otherwise connected to the metal sleeve and the magmount body other than just using physical contact and screw pressure to hold everything together.  But then I suppose that would have increased the cost of the product significantly.

In the near future,I think I am going to upgrade the quality of the coax, too.

72 de Larry W2LJ
QRP – When you care to send the very least!


Larry Makoski, W2LJ, is a regular contributor to AmateurRadio.com and writes from New Jersey, USA. Contact him at [email protected].

A Summer Trip to Greenland

the_office

A professional colleague who is the principal investigator of the Sondrestrom incoherent scatter radar facility announced at a conference that they no longer had a scientific high-rate GPS receiver at the site for making ionospheric measurements.  I enthusiastically volunteered to ship them one that I had on the shelf.  She suggested that instead I should come install it myself and I found some support to do it (the National Science Foundation heavily subsidizes U.S. Greenland and Antarctic scientific travel during their respective summers, making this trip possible).  Therefore unlike my previous trip in the winter, this trip did not involve travel with the most perverse of arrangements flying to Copenhagen only to hop on another plane and fly half-way back to the States.  I set off for my second trip to Greenland, leaving Scotia, NY, early on Monday and returning mid-day on Friday.

On the past trip, conditions were really awful for radio with plenty of visible Aurora.  I didn’t really mind that because the auroras were beautiful, but with only a small chance of NLC/PMC (noctilucent/polar mesospheric cloud) sighting in the summer, I was eager for some good radio conditions to sate my appetite for other nerdy activities.  I set up the radio equipment almost right away the first evening to make sure that everything tuned up and immediately made 10 or so QSOs on 20-meter CW before heading to bed.

Instrument installation is always a hairy business, especially when you can’t just run to a hardware store, let alone going to RadioShack or calling McMaster-Carr.  Sometimes, everything works smoothly; other times it doesn’t.  In any case a flexible attitude (and some good old ham practicality) goes a long way.  Wind gusts of 40-50 mph (18-22 m/s) on top of the hill made for exciting work, but having a couple of helpers made it go smoothly.  Here is a photograph of the installed instrument on its hilltop (the box and green antenna on the right-hand side of the pole, which also held a weather station).

instrument
Work, especially some recalcitrant Windows 7 issues (At one point, I was running Windows 7 in a VirtualBox virtual machine on a Linux machine and logging into the Linux machine from a Mac!), kept me pretty busy on Tuesday and Wednesday and I only managed a few minutes of operating on each of those days.  But, by Thursday, my schedule broke loose a little and I was able to operate for a few solid hours in the afternoon and evening.  I had no idea that Greenland would be so popular on 30 meters!  Wow.  That’s definitely the most intense pileup I’ve ever experienced.  Thanks for being patient.

There was some about S3 hash on 20 and 30 meters that the K3′s NR function would take care of but the NB function wouldn’t.  NR is not good for running pileups, so I often had to get the caller isolated to use NR.  On the receiving end, there was a lot of fast QSB, with a period of a few seconds (this is consistent with magnetospheric and plasmaspheric waves that impinge upon the auroral and subauroral regions.)  In any case, callers were up and down, often in the span of a call.  You all on the other end may or may not have observed the same from me.

Per usual, the setup was an Elecraft K3 and the GU Special vertical with 2x 1/4-wavelength radials for each of 20 and 15 meters.  Everything else was tuned by adjusting the length of the radiating section.  This is a substantial improvement in performance-to-size ratio over the previous station I carried in January 2012, which was a Yaesu FT-840, DK9SQ 10-meter telescoping pole, and a variety of wire antennas.  Below is a photograph of the GU Special deployed (it’s in the center, unceremoniously ty-wrapped to a wooden sign post sticking out of a barrel).  The diesel Toyota HiLux pickups are the most popular vehicle in town.  We gave a visiting graduate student lessons in driving a manual transmission.  Great vehicle to teach/learn on with lots of torque and low gearing!

gu_special_sonde

Although I was unable to connect with them, we did drive past the OX2A/XP1AB site on Black Ridge that overlooks downtown Kangerlussuaq:

ox2a_xp1ab
Thanks for the QSOs.  The log has been uploaded to LoTW this morning and QSL cards are ordered.  I never ordered cards after the last trip, so it will be a shared card with a photograph of the aurora.


Ethan Miller, K8GU, is a regular contributor to AmateurRadio.com and writes from Maryland, USA. Contact him at [email protected].

RSGB IOTA Contest expedition to NA-140

Delmarva_IOTA_card_r0

I forgot my camera at home and my mobile phone battery died so there are no photographs of this adventure…

I first experienced the passion of those pursuing RSGB’s Islands on the Air (IOTA) programm(e) when I was active from Adak (Andreanof Islands, NA-039) in August/September 2012.  Matt, KB9UWU, and I made some tentative plans to do the 2013 RSGB IOTA Contest from NA-139 (Maryland State East, Assateague), returning to the site where he and W3CF had done the same contest over a decade prior.  During the planning stage, I cast about for the nearest IOTA groups to activate.  For the DC area, the easiest groups are surrounding the Delmarva Penninsula, NA-083 (Virgina State), NA-139 (Maryland State East) and NA-140 (Maryland State West).  We did not execute the plan to go to NA-139 and I had really given up on the idea of doing anything for the IOTA contest…

That’s when work interviened.  I scheduled a trip to Greenland (story about this to follow in a future posting) leaving late on Sunday of the IOTA contest weekend.  My wife Sarah had a cousin with a baby shower in Ohio on Saturday…so, we did the logical thing…packed her and Evan off to Ohio on a Saturday morning flight.  After dropping them off at the airport, I headed to the Eastern Shore for some IOTA action.

The principal mission for this trip would be to understand the difficulties in activating NA-140 and to make it widely available to the IOTA community because it is apparently rather rare (25% claimed, versus 19% claimed for Adak).

The station setup was simple and typical—an Elecraft K3 and an updated version of the GU Special.  The GU Special had just returned Tuesday from KL2HD’s KL7NWR expedition to NA-064 back in June (he had left it on the research ship until it returned to port, so technically, it’s probably visited some other rare IOTAs, too).

In order to avoid discharging the car’s battery, a mistake that could leave me stranded far from home, I lugged along a few SLA batteries to power everything.  I selected a couple of candidate sites using aerial imagery and ended up using my preferred site, which was very accessible to saltwater and the road, making it trivial to setup the radio in the car and
the antenna on the beach.  I now understand why NA-083 and NA-139 have much more activity—they’re close to civilization!  Nevermind, I love the middle of nowhere.  So, it was fun.

I configured the antenna for 20 meters and launched a few CQs on CW.  It took a while to get a run established, but after that the pileup was pretty much non-stop for about 3 hours.  I even worked some JAs, which was pleasing considering that NA-140 is very rare there and I was not QRV during the peak hours for JA.

Unfortunately, I hadn’t rigorously tested the batteries beforehand (except for one) and only one (the one I tested, of course) of the five performed well.  One performed acceptably and was relegated to running the inverter for the laptop once the battery warning came on.  Even the “good” battery sagged under load at 100w transmitter power.  So, I cranked the K3 down to 50w and let it rip.  That was enough to produce a commanding signal in Europe, with RBN Skimmers showing my signal peaking at 47 dB SNR with many hits in the 30s of dB.  As Matt said when we talked after I returned home, “I have trouble getting those kind of numbers with a small beam and the legal limit!”  Verticals on saltwater rule.  End of story.  Hearing was a different issue as there was some line noise and the occasional passing boat, who provided more QRM in the audio range than the RF range.

My pileup thinned out a little bit around 2020 UT and I was exhausted.  Evan didn’t sleep well the night before and that didn’t help anybody else sleep, either.  Plus, it was hot, even with the nice breeze and pleasant temperatures.  If all of that wasn’t enough, the battery in my mobile phone had discharged, the battery in the laptop was nearly dead and both the K3 and the inverter began
throwing low-voltage alarms.  It was time to pack up.  Fortunately, the GU Special deploys and stows in 15-20 minutes, so it wasn’t bad.

I ended the three-hour window with 215 QSOs and 11 (!!! that’s what you get for CQing the whole time) island multipliers, all on 20 meters.  I’ll take it!  Thanks for the QSOs.  I just ordered cards today and they should be printed and ready to send by mid-August.


Ethan Miller, K8GU, is a regular contributor to AmateurRadio.com and writes from Maryland, USA. Contact him at [email protected].

Contest wall paper…….

Most of the time I participate in a contest just for the fun of it without any expectation of placing anywhere close to the top. Last week I was reading some of the blogs that I follow and Scot KA3DDR blogged about CQ WW DX  contest certificates you can get online. It's very simple you plug in your call and low and behold you are told if you have a certificate waiting for you. If you do it's easy you just download it and print it!

Mike Weir, VE9KK, is a regular contributor to AmateurRadio.com and writes from New Brunswick, Canada. Contact him at [email protected].

Profiles in QRP – Volume 1 – Ken Louks WA8REI

One day, I was thinking about how much I like to read about my fellow Amateur Radio operators.  I love it when they tell stories about how they became Hams and how they first learned about Amateur Radio, what they’re doing now, and what their other interests are. It simply fascinates me.

I decided to develop a series of blog posts titled “Profiles in QRP”.  A series of questions will be posed to those who have shown interest and dedication to the QRP game.  In the coming months, some of the profiles published will be of QRPers you are probably very familiar with – some maybe not so.  The idea is to ask these questions across an entire cross section of QRPers – portable operators, contesters, rag chewers, tinkerers, inventors, entrepreneurs, (maybe even bloggers!), etc.

I had intended to kick this series off last month, but I was delayed in doing so.  My intention is to run one profile a month. For August, I will run two profiles – one at the beginning of the month and one at the end.

The first profile is of Ken Louks WA8REI.  If you’re on the air at all, you’ve probably run into Ken numerous times.  He is active in a lot of the QRP Sprints and is always to be found, ready and eager for a rag chew. Ken is also very active in the Polar Bears QRP group – a bunch of QRPers dedicated to portable outdoor ops away from the conventional shack.  There he is most affectionately known as Blackjack Bear. It’s always a great pleasure to run into Ken, whether it be a short sprint QSO or a longer one where you can gnaw on a piece of “sammin” with him.

1) How did you first become interested in Amateur Radio?

My first exposure to Amateur Radio was through my Uncle Ed Wissmiller, formerly 8CEH, who resided in Saginaw, Michigan.  He helped me learn the code when I was 12 years old. He had let his ticket expire years before I was born, but he was quite the guy! He was a WW I pilot, and later, a stunt pilot and a wing walker.  In fact, he invented the remote water meter reader, so he had quite the technical bent. He was a printer by trade, and had several printing presses in his basement.

Also, my dad had given me a Heathkit CR-1 Crystal Receiver when I was 10 years old, in 1957. I still have it, and it works like new! My dad always encouraged me to learn about many things. I sent and received Morse Code via light to and from another neighborhood kid. I was also inspired by several other Hams who all lived within 2 or 3 miles from me – “bicycle range”.  I was both a Cub Scout and a Boy Scout.

2) How long have you been licensed?

Since June, 1965. My Novice station was a Knightkit T-150 transmitter and a Heathkit HR-10 receiver, both of which I built as new kits.

3) What drew you to QRP?

I had a Heath HW-100 Transceiver, which I always tuned up at minimum power.  One day, I forgot to increase my power after tuning up, and following a long, solid QSO, calculated that my output power was 4 Watts. I’d operate QRP a few times a year in the ’90’s. Always liking a challenge, I became a serious QRP Op in about 2000.

4) Who has been your biggest QRP influence?

Nobody in particular! I had no QRP Elmers. With the advent of the Internet, I’ve found many like-minded Hams throughout the world and many QRP clubs, so I’d have to give credit to the Internet for being my main influence.  Again, the challenge of working other stations at 5 Watts or even milliWatts is a thrill that kW QRO Ops will never experience!

5) What is your favorite QRP activity?

Contesting. It keeps my CW skills honed, and it shows me how well my antennas are performing. This can be a major contest or a QRP Sprint; either are enjoyable. I like the competition, but I’m never a sore loser!

6) What’s your favorite piece of QRP gear (past or present)?

My Yaesu FT-817ND.  My first QRP rig was its predecessor, the FT-817.  It’s a great all band, all mode rig, and it’s very portable.

7) Describe your current QRP station.

FT-817, Hustler 4BTV Vertical, 80 M Dipole, Bencher Paddle (I’m 100% CW), LDG Z100 Autotuner at my camping trailer in the woods near Rhodes, MI – “Permanent Portable” Hi!   At home, a FT-2000 at 5 Watts and a Mosley Pro 67B Yagi at 48 feet. I also have a DC40B, built by my friend WD9F that puts out about 700 milliWatts on 40 Meters. It’s a fun rig!

8) What is your fondest QRP memory.

That would be working 3B9C, Rodriguez Island in the Indian Ocean, through a MASSIVE pileup while I was on Wagon Wheel Hill, elevation 1,500 feet back in the Winter of 2006. My 2nd best was working Tanzania from near Dayton Hamvention, using 2.5 Watts.

9) What other hobbies/interests do you enjoy when your not on the radio?

I was a professional organist/pianist from the age of 16 until I had a stroke in 2008. I taught private piano lessons for many years. I play the hammered dulcimer. Ham Radio has always played “second fiddle” to my music. I have a grand piano in my living room, 4 electronic keyboard and a professional recording studio.

I have hiked 1,500 miles in 2007, bicycled 60 miles per day. I enjoy traveling, especially to the mountains of New Hampshire or Colorado. I could live outdoors if not for the bugs and weather!

Thank you Ken – for being my first victim …… err, QRP Profile!  You are indeed a very brave soul!

Seriously – a very hearty “Thank You” to Ken for sharing his Amateur Radio and QRP background with us. As I stated before, I hope to have a profile for you every month.  Ken was supposed to have been the profile for July 2013.  There will be another at the end of the month for August.

So ……. if you see an e-mail from me in your Inbox titled, “Profiles in QRP”, please don’t run, screaming into the night.  It will be a request for us to get the opportunity to know one of our fellow QRPers just a little bit better!

72 de Larry W2LJ
QRP – When you care to send the very least!


Larry Makoski, W2LJ, is a regular contributor to AmateurRadio.com and writes from New Jersey, USA. Contact him at [email protected].

Working DF1LX (Peter) from the River

Dear Peter – What a wonderful QSO with you from along the riverside! I promised I would send some pictures and here they are. I am also writing you a note with a full account of my radio adventure this afternoon including our QSO. I also worked Columbia and Denmark.

camper

The journey starts when I take the bicycle out of my VW camper on the old road that runs along the river and goes to New Hampton. The road has a gate, so to proceed, one must use a bicycle, a horse, or go on foot.

The road hasn’t been used regularly since the 1940s. It’s beautiful and passes through old farm land. When I first came to this spot nearly 40 years ago, a farmer grazed his cattle in the nearby fields. After cycling for a kilometer or so, I come to a corner with a perfect view of the river.

corner

I continue another 2 km and come to an old bridge abutment. The bridge is no longer there, but there is a small clearing under some tall trees where I like to operate.

bike

I pull the equipment from my bag and heave a line up about 12 meters over an oak branch. Then I pull up a 10 meter wire. It is perfectly vertical, and I sit down directly under it.

rig

Today I am using the KX3 at five watts. The coax runs to a 9:1 unun and then to the antenna. At first I listen on 20 meters and hear HK1R calling CQ from Columbia. We quickly exchange 599s, and I switch to 15 meters. There you are, and I call. You know the rest, but for the sake of other readers, I will say you are 589 and you give me a 569. I tell you that I am QRP and portable near the river. You send, “solid copy from UR QRP DR Jim.” While we are chatting, you find my web page and comment on the pictures. I promise to send you some photos from today. We continue for more than 20 minutes. I am amazed that you can copy my tiny signal so well! Finally the QSB arrives and you drop down to 549… Surely you can not copy much of what I am sending at the end… You send, “So now I have got some QSB x Perhaps conditions are changing.” With that we say goodbye. What a wonderful contact half way around the world.

Before packing up, I go to 17 meters and make a quick contact with OV1CDX on Sjaelland Island in Denmark. Frank is 599 and he gives me a 559. I am overjoyed and walk down to the old bridge site to take a picture.

river

I drink in the view, being careful to avoid the poison ivy! It’s everywhere here. And I walk back to the operating position and pack everything away for the ride back.

road

Peter, I hope you can now imagine how much fun I have on these radio outings. What could be better than a ride through glorious countryside… add to that a QSO with DF1LX and a perfect afternoon is guaranteed. Thank you, my friend. 73 Jim W1PID


Jim Cluett, W1PID, is a regular contributor to AmateurRadio.com and writes from New Hampshire, USA. Contact him at [email protected].

Amateur Radio Newsline Report 1877 August 2 2013

  • Hams in Hawaii go on alert for Pacific Storm Flossie 
  • India recognizes three hams as rescue radio heroes 
  • More than 400 attend ARRL Hurricane readiness webinar 
  • Vandals topple a radio tower that’s home to digipeater 
  • Monitoring Times to cease publication at the end of 2013 
THIS WEEKS NEWSCAST
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