Posts Tagged ‘amateurradio.com’

Is the QRP community close knit, or what?

QRP is fun.  That's why I do it. But one of the side benefits of QRP (and there are MANY), is the people, the QRP community. Since becoming a dedicated QRPer, I have made friends with so many really fine people. I can't begin to tell you of how many friends I have that I have never met face to face. And I maintain closer friendships with some of these people than with other folks I actually "see" on a regular basis.

To emphasize this point, here's a story that one of those friends, Jim W1PID, posted on QRP-L today:

An hour ago I got a call on my cell phone. The caller ID said New Jersey. Must be a telemarketer I think, so I don't answer. A few minutes ago another ring from the same number. It's Guy N7UN. 

"HI Jim... this is Guy N7UN... did you call me?" 

I explain that I got a call from him that I didn't answer. Well... turns out he's doing a SOTA activation on the highest mountain in Maui! 

"You gotta rig?" I ask. 

"Ya", he says." I'm on 14.062."

"OK, I'm going to the shack." 

So I just had a QSO with Guy in Maui.  Wow and Mahalo!

 Haleakala Crater, Maui's highest peak, it rises over 10,000 feet above sea level. KH6/MA-001

I am sure there are other hobbies which provide tight knit friendships, but I've never experienced that until I joined the QRP community. You folks are the best!

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

Ring that school bell!

Our second Technician License class started last evening. This time, instead of being open to just the "public", this one is primarily intended for the Clark, NJ CERT Team. Drew W2OU, Marv K2VHW and yours truly met with, introduced ourselves to, and began the process of instructing 15 potential new Hams.


It's always fun and exciting to be with a group of people who show genuine interest in Amateur Radio, as was the case last night. All of these folks showed enthusiasm and curiosity and an eagerness to learn.

 That's Marv K2VHW on the left and W2LJ on the right. 
Notice the coffee cup - gotta have cup of coffee before class, after a long day at work!

We will become "buddies" over the course of the next seven Tuesday evenings, and hopefully after that, we will add more people to the ranks of Amateur Radio.

And if the teaching gig isn't enough, I was thinking of home brewing a magnetic loop this winter. My line of thinking is that I could build one for let's say 40-10 Meters. From what I understand they're not huge. Then, when it gets really frosty in the basement, I could just set the loop up on the main floor and operate temporarily from the dining room table or something like that.  Just a thought, though, as funds are kinda tight.  I have some spare coax (enough for a loop), and I think the only expense at this point would be the tuning capacitor. It doesn't need to be one of those expensive vacuum jobs, so maybe I can find something reasonable on eBay.

My inspiration for this has been Greg, N4KGL. I've been following his posts on Google+ and through his blog.  He seems to be having so much success with his loop that it seems like a worthwhile endeavor. That, and the fact that I feel like building something.

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

Feature Tech AW07A Antenna Analyser – First impressions

Christmas seems such a long time ago and one of my presents was a Feature Tech AW07A HF-VHF-UHF Antenna Analyser which I have finally been able to try it out.


It is about the size of a thick paperback book and is a powder coated steel case similar in style to that used by MFJ equipment, indeed the MFJ-266 analyser appears to be a re-badged version albeit for a lot more money than this unit can be purchased.

It can be powered by batteries fitted internally or by an external supply and is supplied with a power cable for connection to an external supply, mine was white/black rather than the normal red/black cable. It has a N-Type socket for the antenna and comes with two adapters for PL259 and BNC connectors.


It has a power button near the external power socket, two buttons on the top select HF and VHF/UHF operation and two other buttons marked UP and DOWN to select operating mode and/or the frequency band being used. Unfortunately one thing it doesn't come with is a manual but a copy can be downloaded from QSL.net or a slightly different version from the manufacturers website. But I actually downloaded the manual for the MFJ-226 has it is much more detailed.

The front panel decal and manual state it can be run from 10.8-12V, in fact the manual states it should ideally be less than 12.5V and no more than 13V. While doing some research I found the reason for this limitation hidden away on this aliexpress webpage "Avoid higher than 13V power supply circuit for the UV segment may be damaged due to excessive power dissipation." So this would seem to rule out using a standard 13.8V power supply.

It can be fitted internally with eight AA batteries and this is the way most people would use as it offers portability. Removing four screws allows access to the battery compartment and the internals electronics seem well built.


It takes eight AA batteries, in two boxes. The battery boxes have lids secured with a small screws and are fixed to the case using simple sticky pads, while secure at the moment I can imagine in time the adhesive could dry-out and become unstuck leaving the battery boxes loose inside the unit.


The display is a simple two line LCD with an optional bright back light which can be turned on during the power up sequence. The display shows the battery or supply voltage and pressing Down puts the unit into a frequency counter mode. Pressing Up puts into the antenna analyser mode.


In the analyser mode it is a simple case of selecting the HF, VHF or UHF mode. VHF works from 85-185MHz, UHF is 300-390MHz, the HF is split into six overlapping bands A: 1.5-2.7 MHz B: 2.5-4.8 MHz C: 4.6-9.6 MHz D: 8.5-18.7 MHz E: 17.3-39 MHz F: 33.7-71 MHz selected using the Up/Down buttons.

Turning the vernier  tuning knob adjusts the generated frequency the antenna is being tested against. I connected the analyser to my 2m YAGI antenna and turned the knob to find the lowest SWR


The manual describes what is being displayed (on UHF just the SWR is shown)

“139.763 MHz” is the frequency
“V “is the band (A,B,C,D,E,F in HF, V in VHF and U in UHF)

The bottom row shows the complex impedance Z = R + jX, so on this screen 

“41” represents R = 41 ohms the resistive component
“18:” represents the reactance component value, jX = 18 ohms
“45” is the overall complex impedance magnitude Z = 45 ohms
“1.5” is the SWR value

As you can see for a 2m antenna something isn't quite right! The antennas were down due to last weeks strong winds so I was taking the opportunity to do some maintenance and tweaking of the 2m antenna since I'd seen an increase in the SWR during recent UKAC contests. I had suspected feeder issues, possible water ingress but I tried a dummy load at the antenna end but that read as expected (Z=50ohms) and metering the continuity of the feeder showed no issues, it just seemed to be resonant at too low a frequency.


The analyser confirmed what I'd observed with a normal SWR/Power meter a higher than desired SWR in the middle of the SSB section of the 2m band.


Unfortunately I was unable to get it any lower than 2.5 and most adjustments seemed to increase the SWR.  For peace of mind I double checked the analyser by swapping the feeder on to the 2m/70cm collinear and that was spot on


again I double checked the SWR readings back in the shack using the normal meter


While I try to sort out the antenna issue I can say the analyser seems to do its job well. The tuning knob is a little twitchy and has a bit of play which makes setting the frequency accurately a little harder than it should be but hopefully that might improve with use.

The unit also has other functions none of which I have used yet but it is bonus to have some useful test functions available in the shack.

The AW07A can be used as an inductance/capacitance meter by powering it up with the U or D button held down. The inductance or capacitance of a component fitted across the antenna socket is then displayed and this can be done for any test frequency by selecting the band and turning the tuning knob.

As I mentioned earlier the unit can also function as a frequency counter that can measure signals between 1 and 500 MHz and can be used to give an indication of relative RF field strength. A signal source or an external antenna that yields a usable signal level may be connected to the analyser’s antenna jack. The usable signal range is quoted as -20dBm (30mV)  to +10dBm (1V). Note that the display reading is a RMS value.

Obviously in the antenna analyser mode the output which is approximately 2V in magnitude can be used as a signal source, with 20dB of second harmonic suppression. 

The MFJ manual goes into some detail of how this all works and how to use the analyser for a number of common tasks such as checking baluns, making 1/4wave stubs or measuring velocity factor of coax.

While the AW07A has some obvious shortcomings and may not be a precision device I am impressed with it and what it can seemingly do. It is shame about the lack of a manual but I am not sure getting one is justification for the premium price of the near identical MFJ unit.

ARRL needs to lighten up

So .... the ARRL rejected the idea, out of hand, for the new "Jeeves" cartoons for QST. It appears they don't want any cartoons in QST and they don't want "to look to the past". As I've said in my comments, I think this is so LAME that I cannot believe it! It's thinking like this makes me regret my decision to become an ARRL LIfe Member, so many years ago.

No humor? No look to the past? I think "The Old Man" is spinning in his grave at this line of reasoning. Did any of you at HQ ever read his editorials? You are aware, I'm sure, of the Rettysnitch and the Wouff-Hong?  Do you think those inventions of his were NOT stabs at humor? Do you think his editorial letters were deadly serious 100% of the time?

I think the leadership at the ARRL needs to come off its high horse. I also think you guys are starting to take yourselves way too seriously. To say that you are above humor and that you are above living, enjoying and celebrating your past is to put yourselves on a pedestal so high, that no one even wants to bother looking at you.

QST was always looked upon as "THE" Amateur Radio magazine. Jeeves, Phil Gildersleeve, the humor, friendliness and "folksiness" all helped to put you there, so many years ago. I admire your endeavor to maintain that leadership role, but I think your approach is off. And dare say it,  I think HPM would agree.

My Mom, God rest her soul, always told me "Never let your head get too big and never forget where you came from." That advice has served me well throughout the years. I offer the same sage advice to the ARRL, at no charge - compliments of a thoroughly disappointed Life Member.

Before I close this post, one last thought about looking upon the past, and what it can do for you. Hey ARRL, have you looked at NASA's "spacecraft for the future" - the Orion?  Does it remind you of something from the past, like perhaps the Apollo Command Module?  It appears that NASA didn't think that a concept from the past couldn't be made to work well again, and perhaps even better!

Bravo for them, and shame on you.

Footnote: This rant is NOT a knock on the "worker bees" who actually do the work, and produce QST from month to month. They do an outstanding job, for which I am forever grateful. The policy makers, from whom they take their direction and get marching orders from, IMHO, need to wake up and smell the coffee - perhaps, just a little.

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


This would be great!

Jeff Murray K1NSS of Dashtoons fame, posted the following on Facebook today. This would be awesome if it were to come about - and YOU can help make it possibly happen.

From Jim Massara N2EST:

"Eric Nichols, KL7AJ, and I are pitching the idea of returning Gil's classic "Jeeves" character in new cartoons to the pages of QST as a Rip Van Winkle character -- the hobby's changed, but he hasn't. We think it would be a great way to celebrate the League's centennial by connecting the hobby's past to its future. If you like the idea, email QST managing editor Becky Schoenfeld, W1BXY at [email protected] and tell her so -- and share this post of a sample cartoon in as many places as possible."


Jeff goes on to comment further:

 "Fellow ham cartoonist/QSL artist Jim Massara N2EST and his partner in crime Eric Nichols KL7AJ are promoting the idea of a returning Gil Gildersleeve's Jeeves to the pages of QST. I think it would be swell to see Jeeves back where he belongs, trying to keep up like the rest of us geezers. It's a grand tradition. Many classic newspaper comics were carried on by other artists far far after the originals passed on. We grow up with cartoon characters like Jeeves, and they become little parts of of lives, and the continuity can be a small but real comfort."

Back to W2LJ - If I am not mistaken, 2015 is the Centennial of QST. I, for one, would love to see this. I am going to send Becky an enthusiastic e-mail. I hope you'll do the same.

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


It really does work.

When I got home from work last night, the temperature outside was 10F (-12C).  My basement shack was a relatively balmy 57F (14C). Just before it was time to go downstairs for the 80 Meter QRP Fox hunt, I changed from the "regular" sweatshirt that I was wearing to a "hoodie" type sweatshirt.

I plugged the earbuds into my ear holes, and pulled the hood up. I was able to remain comfortable, not quite toasty warm, but comfortable in the shack for my duration of the hunt.  I do have to admit that once I nabbed the second Fox of the night, Randy NC4RT at about 0244 UTC, I shut everything down and hightailed it upstairs. But as the tip was given freely to me last winter, I pass it on to those who may also need it.  If your shack is semi-unheated, as is mine, covering your head makes all the difference between shivering and operating comfortably.

It looks like the coldest weather of this round has left us. It actually warmed up overnight and was 20F (-7C) when I woke up this morning, but snowing. Until the next Vortex comes to visit (and I'm sure there will be more!) the basement should warm up to the low to mid 60F range (15-17C) and playing radio down there won't be so bad, at all.

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

Being grateful

A conversation has started on the QFOX reflector amongst the Hounds and Foxes. We're sharing with each other what our antenna situations are.

Myself, I am using a Butternut HF9V which is ground mounted and had about 55+ radials running from underneath it.  I also have an 88' EDZ which is up in the trees somewhere between 25-30 feet (8-9 Meters) up. My W3EDP is still up there, but I need to change the coax. Still haven't done that, but will, someday.

If you look at the standings in the Fox hunts, come the end of the seasons, you will find W2LJ firmly ensconced in the middle or just below the middle of the pack. I suppose if I had more wire up, higher - that could possibly change.  But what I have is what I have, and for that, I am grateful.

There are a lot of Hams out there who would consider what I have to be the "best antenna farm - ever". These guys live in places where their antenna possibilities are either severely limited, or perhaps not allowed at all. Some may even be restricted to operating portable 100% of the time, from their cars or local parks, perhaps.

So I am always mindful to be appreciative of what I do have - particularly when I find myself falling into that "wish I had more" rut.  It may not be as good as what a lot of others have, but it's also a lot more than what a lot of others are forced to live with.

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

BTW - To all my Orthodox friends out there - Merry Christmas!

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