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Archive for Antennas

Smiley

Smiley Antennas

Posted by Jim Wilson 
· Saturday, December 1st, 2012 
· 4 Comments

There must be a rule that I’ve adopted — nothing can be left alone, always adjusting and tweaking — I’m sure it’s an ethos of continuous improvement. But, if only it worked out that way! The improvement part, that is. My latest adjustment, at least that makes it to these pages, is the search for a nifty antenna for my Icom ID-31A 440 MHz hand-held.

The impetus for this effort is that the ID-31A is a 70 cm only transceiver. So why use a dual 2M/70cm antenna? Well, the antenna that comes with the unit is a dual band antenna. So I began looking for both mobile and replacement hand-held antennas that were just for 440 MHz. I did find one mobile antenna, a Super-M 400 from MP Antennas. It looks really cool, too. But it does cost a fair bit. So after some searching and considering what my actual use will be for a mobile antenna, I decided on a Diamond MR-77. While it is dual-band, what I liked about it was the built-in magnet mount and the cable terminating in an SMA connector. So it’s one unit without adapters, etc. It works well. I’ve been using it primarily on Saturdays when I drive about 25 miles one-way to pick up my daughter.

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Smiley Slim Line 440 MHz
Smiley 5/8 Slim Duck 440 MHz
ID-31A Original Antenna

As to the hand-held antennas, I’ve provided a slide show of the ID-31A with the original antenna and the two Smiley Antennas that I’ve purchased. I tried the 5/8 wave Slim Duck first. You can order the exact frequency you want, in this case 440 MHz. It works well but just didn’t suit my eye. So after a couple of months, I sprang for the Slim Line also tuned for 440 MHz. I really like this antenna. It, too, works well. What I like is the slim look and the very flexible whip antenna. It looks just right, at least to my eye. I’ve also appreciated Smiley Antenna’s very prompt shipment.

I really like my Icom ID-31A. While I’ve looked at the new ID-51, that’s the dual band version. It doesn’t really appeal to me. Most of the D-Star repeaters are on 440 MHz anyway. As to D-Star, right now I’m listening to the local Fort Worth repeater on reflector 001C with some guys in London and locally talking about D-Star technology. This morning it was Storm Spotting appreciation day with stations checking in from all over the US, Britain, and Belgium. This I like. One more ham radio adventure. I hope you have your own adventures going on. Comments welcome.

 

4 Comments
Categories : Antennas, D-Star
Tags : Antenna, D-Star
logger

Skookum and Oceania CW

Posted by Jim Wilson 
· Sunday, October 14th, 2012 
· No Comments

As I was preparing for the Oceania CW contest, I searched around for the right logging software to use. RUMped doesn’t cover this contest and trying to create my own plug-in didn’t quite work due to the complexity of the rules, from points per QSO per band, to unique prefixes as multipliers. So I looked into Skookum Logger and found not only that it was already set up for this contest but that I’d used it for last year’s run as well. So much for my memory.

Getting things set up was a bit of a challenge. But as usual Bill, K1GQ, the creator of Skookum Logger, responded to my emails and coached me through setting things up in Snow Leopard, the new OS. Often times he does great coaching on how to use the operating system, since his contest software is already operating superbly. I also consulted Skookum Logger for Dummies written by Jonathan, G0DVJ, and available on the Skookum Logger website. It was very helpful in getting me up to speed with changes in the software along with some new capabilities with my K3 around the second receiver. I was hoping to do some SO2V but it really wasn’t necessary as there were so few stations on the air. Still it was a great experience with Skookum Logger, thanks to Bill and Jonathan.

Skookum Logger screen capture during Oceania CW

I took a screen capture of Skookum Logger in operation, above. The other thing that Bill helped with was importing the correct map image. He helped me find the now hidden Library folder on the Mac.

K5ND Score for Oceania CW 2012

This time I ran the Oceania contest in the assisted mode, since there is no non-assisted entry category. This was my first contest using CW Skimmer and the DX Cluster. Thank goodness I went assisted as there were so few stations on the air from Oceania that I could actually hear. I the only three countries worked were Australia, New Zealand, and Hawaii. Total QSO’s 26 and multipliers 21.  The most active time was early Saturday morning at the beginning of the contest when 40 meters was active. After that the stations were few and far between. Last year I managed to work 40 stations. So perhaps propagation wasn’t as good this year. Both times I put my 15 meter Moxon beam into play. It really helped on several contacts to dig the station out of the mud and get heard as well. This is the one contest where I’m able to work stations that are really weak. Usually, there is too much QRM for that to be possible. Plus, there are so many other stations on, that there is no need to dig deep.

Another fun adventure in ham radio — Oceania DX Contest and the Skookum Logger software running assisted. 73, Jim, K5ND

No Comments
Categories : Antennas, CW, Radio Contesting, Radio Software
K5ND Moxon Beam

Ham Nation #67

Posted by Jim Wilson 
· Friday, October 5th, 2012 
· No Comments

My Moxon Beam Video ran on Ham Nation this week. You can see the full episode at Ham Nation #67. My video starts at 14 minutes into the show. But while you’re there, check out the entire episode. I really enjoy watching the show live on Wednesday evenings. The recorded version is usually posted on Thursday or Friday. Great coverage of ham radio topics.

No Comments
Categories : Antennas, Ham Radio, Video
surge-protection

Surge Arrestor

Posted by Jim Wilson 
· Saturday, September 22nd, 2012 
· No Comments

You’ll recall that a couple of months ago I’d updated the coaxial feedline to my HF2V. In that process I’d removed the simple lightning arrestor from the base of the antenna, resolving to add a surge arrestor at a later date. Well today was the day.

I purchased two Array Solutions AS-303U surge arrestors along with the bracket that can hold up to four. I also purchased an eight-foot, 5/8 inch, ground rod. The surprise of the installation was how easy it was to get the ground rod into the clay soil. When I last installed a ground rod, at the base of the HF2V, I dug a huge hole. It was roughly 4 feet deep to also hold the concrete for the base of the antenna. I then proceeded to pound the ground rod in the next four feet. What a difficult effort accompanied by a fair amount of swearing. This time I found an online recommendation to dig a small hole, fill it with water, and press the ground rod in about an inch, followed by pulling it out, and pressing it in again about an inch. I’ll be darned if I didnt’ get the ground rod in all the way with no problems. I did clamp on vise-grips toward the end of the effort to give me a better handle on the rod. Piece of cake! I will not shy away from this effort in the future.

I’ve taken a few photos of the installation. I also took advantage of the installation to use Scotch 130C rubber splicing tape covered by Scotch 33+ electrical tape. I did this on both my surge arrestor and on the isolation baluns. The installation looks good. I hope I never have to report how it held up to lightning!

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Two surge arrestors from Array Solutions.
Ground rod and bracket for the surge arrestors.
Array Solutions surge arrestors.
Isolation baluns with weather proofing applied.
No Comments
Categories : Antennas, Radio Equipment
Tags : Antenna
QRP-Text-160

NAQP CW August 2012

Posted by Jim Wilson 
· Sunday, August 5th, 2012 
· No Comments

Just completed the North American QSO Party, CW, August 2012 edition. I decided to enter the QRP (5 watts) category this year. I’ve been operating at low power (100 watts) since I installed the 100 watt amplifier in my Elecraft K3. That has been roughly a year now. What I’ve missed about QRP is looking at the scores afterwards and winnowing out the other QRP scores and, on rare, occasions winning some obscure geographical category within the contest. In the Low Power category I end up somewhere in the middle of the pack and am left trying to compare my results with my previous scores. Fun to be sure and helps drive improvement in your station and operating practices but doesn’t provide much perspective on the rest of the competition. Actually, it does a very good job of that — placing me where I belong — in the middle of the pack, if not lower.

QRP, however, can be quite a bit more frustrating than Low Power. At least with Low Power, most of the stations answer my calls and you can get through pile ups a bit better. With QRP you’re lucky if they can hear you at all. Then, when they do, it’s back and forth trying to get the call sign correct and the exchange. Thanks so much to some great operators who really work to dig out your signal from noise (QRN) and station interference (QRM).

Given all that, my overall score wasn’t too bad. You can see nearby that I had 197 QSO’s for just over 15,000 points. If I’m reading the logging software correctly it appears that I worked 43 states. I usually try to erect a temporary antenna to help with the contest. Usually, that has been my Moxon beam on 15 meters. However, my Texas location with this USA contest means I need to work in all directions save south. So my existing verticals work well for the contest. However, I felt that an 80 meter dipole might help the effort with some higher angle radiation to snag the closer stations. It worked pretty well and lowered the noise level on 80 as well. It didn’t really work on 160 meters. Plus, operating QRP on 160 is only for the brave.

I also ran this year as part of the DFW Contest Group’s QRP Team, called the Nachos. We actually had 6 group members sign up for QRP entries, but only five to a team. It will be interesting to see how the team fares in the competion. This is a new experience for me.

Next steps for improvement are to do some fine tuning on the resonance of the 80 meter dipole for next time. I also need to consider whether I should enter some of the DX contests in the QRP category. Hope to hear you on the air!

No Comments
Categories : Antennas, CW, QRP, Radio Contesting
Tags : Antenna, Contest, QRP
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