AmateurRadio.com

It's been a while since I really made an effort to use the ol' Vibroplex.  I gave the contacts a decent cleaning today and gave it a whirl in a QSO with Art K8CIT. I don't think I sounded terrible - and I hope Art didn't think so either. I could use some more practise, though, and I will continue to use it more often.

I haven't run this piece in a long time. It's from my old webpage on how to adjust a bug:

Using a bug is a real fun part of using Morse Code.  Adjusting one properly so that it works right for you and doesn't frustrate the heck out of you is easy; if you take your time and work methodically. Refer to the photo below for reference.


The first thing you do is to back off all the adjusting screws quite a bit.  Not all the way; but far enough out so that everything is nowhere near being set.  Once that's done you want to adjust the action of the pendulum.  Unscrew "A" - this is the pivot point for the pendulum.  Slowly tighten it. You'll know you have it adjusted correctly when the pendulum moves from side to side freely with no binding; but, at the same time, you can move the finger pieces up and down with your fingers and feel very little or no play.

The next thing you want to do is to adjust screw "B".  Allow the pendulum to hit the damper.  Screw in "B" to the point where you can either see or just perceive the pendulum has touched the damper.  Stop there and secure the screw with the knurled lock nut.  It is important not to move the pendulum too far away from the damper or else you will not be able to reliably stop your "dits".

The next thing you want to do is adjust the  left trunnion screw -  D.  This will control the amount of side to side travel of the pendulum.  For smooth code this gap should be very small.  I take a piece of ordinary printer paper, fold it in half to double it and adjust the spacing so that the paper will just slip between the point of the screw and the pendulum.  This results in a very small amount of side to side travel.  The end result is a nice and clean transition between "dits" and "dahs".  I do the same thing for the amount of spacing for the "dah" contact at C.  I turn that trunnion screw in so that the paper slips in the gap easily with no binding, then I lock the set screw in place to keep the setting.

The next thing you want to do is adjust the "dits" making part of your bug.  This is done by adjusting "E".  When "E" is adjusted correctly, you should be able to swing the pendulum to make "dits"; and get 10 to 15 "dits" before the pendulum dampens out and comes to a rest.

"F" controls the tension of the "dit" action.  I find it best to tension the spring about half way.  Hopefully, if you follow this guide and play around a little bit and experiment, you will find the "sweet spot" that will allow you to send really glassy smooth Morse Code.

Sending with a Bug is just as much fun as sending with a keyer and paddles.  However, sending with a Bug allows you to add a little personality.  Listening to CW sent with a keyer sounds sterile compared to that sent with a Bug.

If you need to slow down the speed of your Bug to a point that's even slower than what you can get with the weight(s) positioned all the way to the end of the pendulum, then clip a clothes pin or a few alligator clips to the end of the pendulum.  This will slow down a Bug to an effective speed as low as 13 words per minute or so.

In my opinion, you know that your bug is adjusted properly when you can send characters like X, Y, Q, C, F and L with little effort, and they sound good - or at least recognizable in my case!

Here's a great video that shows you how to do it, also:


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

By now, most of you have heard that, at least in the New Jersey area, "The Blizzard of 2015" has turned out to be a big bust. The forecasters were warning us of 18-24 inches (45-60 cm), plus. Instead what we actually received was about 4 inches (10 cm).

I am one of the ones who is not disappointed. I would much rather have the weatherman tell me I am going to get 24 inches of snow, and only get 4, as opposed to the other way around. Meteorology is an art, even to this day. To anyone who is forcing the weather people to eat crow today, I say, "Let's see YOU try it for a while!". I am hearing so many people say, "Oh yeah, I knew from the beginning it wasn't going to be that bad."  Yeah ..... right.

Listening to New England stations coming through Echolink on the local repeater, I understand they are getting hammered, as predicted. Stay safe, warm and dry, my friends.

Even though we didn't get the snow, we did get the cold and the winds. Not gale force winds, but when I was out there shoveling snow, I was chilled to the bone. And the whole time I was removing snow, I was dreaming of something like this:



Thanks to Sean KX9X for posting this.  Some portable outdoor QRP in a nice, warm sunny location is EXACTLY what the doctor ordered, right about now.

On a side note, the office was declared closed for the day last night, when the ominous forecast was still hovering over us. So when the snow stopped this afternoon, having some time available, I went out and switched the coax from the EDZ over to the W3EDP. Much to my relief, the W3EDP hears fine again! It loads up easily on every band and the KX3's auto tuner handles it with nary a whimper.

As it turns out, the coax problem on the W3EDP was entirely may fault. When I went to disconnect the coax from the balun at the end of the W3EDP, I noticed to my horror, that I had never sealed the connection. It's no wonder that water got in there. This time, I double coated the connection with tape, added some plumber's putty over that, and added a final layer of tape.  If the W3EDP plays as well as I think it will, I may just end up taking down the EDZ this Spring and keeping the W3EDP as my primary wire antenna.

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

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!

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.


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!

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.

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!

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 bschoenfeld@arrl.org 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!