AmateurRadio.com

The September issue of PC Pro (a British computer magazine) arrived today. Featured on the front cover was an article exposing the rip-off prices charged by music download sites. Madonna’s Celebration (which I presume is a popular music album) would set you back £11.18 at MSN Music or £11.99 at Spotify but would cost you only £2.98 from Amazon.

Included with the magazine was a DVD which contained a free copy of Paragon System Backup 2010. As I didn’t have any backup software for 64-bit Windows I thought this was fortuitous, so I decided to install it. But after handing over my email address in exchange for a free registration code it failed to install. The developers had used the ridiculously overpriced, overcomplicated and error-prone InstallShield (programmers will know what I mean) to create the setup wizard and only a few seconds into the install it threw up an error message about being unable to initialize the Javascript runtime and died.

I tried the obvious things like checking that Java was installed, running the installer in administrator mode, and even Googling the error message and trying the suggested remedy of registering the Javascript DLL, all to no avail. So I decided that I was not going to rely on backup software from a company that could not even produce an installer that would run on a brand-new computer, and consigned Paragon to the Recycle Bin (both literally and virtually.)

I spent a couple more hours downloading, being unimpressed by and then uninstalling a number of other free backup programs. I even discovered that there was a backup program included with Windows, but for some reason the version that comes with Windows 7 Home Premium has been hobbled by only being able to back up to writeable DVDs or removeable hard drives, not my network attached backup server. After being advised that the backup would take 6 or 7 DVDs I decided against it.

In the end I decided to stump up for a copy of Acronis, which most people seem to regard as hands-down the best backup software you can get. It can create disk images from which you can restore even if Windows won’t run and it has a continuous backup option that backs up your files while you work so you can revert back if you mess up a file. It even has a “Try and Decide” sandbox that lets you safely try out software you aren’t sure about to see if it will do anything nasty to your hard drive.

The Acronis website informed me that this paragon (small p) of backup software would cost £39.95. After checking some reviews, in my usual lazy fashion I typed “acronis trueimage” into the Google search box to find my way back to the website, and Google helpfully included three “shopping results” in its list of related sites. Included there was an offer of Acronis TrueImage Home 2010 from Amazon for £17.99.

Eh? I can buy online and pay £40 for an electronically delivered product the manufacturing and delivery costs of which are near zero, or I can have a physical product that has been mastered onto CD and put into a printed box, possibly with a manual, which has then been driven to a warehouse and stored waiting for me to buy, after which it will be put into a cardboard mailer and sent through the post to be delivered to my door, for less than half the price (with SuperSaver free delivery.) Sorry, I don’t see the logic in that, but thanks very much Google and Amazon.

Ed Piskor's QSL card for N2H

The station has a great QSL card (above) which was drawn by Ed Piskor of Wizzywig Comics.  Ed shows on his blog how he created the QSL card. I will have to try and catch N2H on the air to get one of those cards.

Great to see amateur radio involved in the hacker scene.

For above image note: Ed Piskor / CC BY-NC-ND 3.0

Last Saturday, I made two QSOs (a quiet day, then!) but what interested me was the difference between them. Both highly enjoyable, but of very different natures.

Sitting out in the sun, before breakfast I was listening to my IC-E92ED handheld, monitoring the local 2m repeater, GB3WH and the D-STAR reflector REF005A. Tyler, WX4TX from Knoxville, TN popped up on D-STAR and we had a great chat. Tyler was some distance from his local D-STAR gateway, but was running 50W and a beam antenna pointing at the gateway. The connection was solid, with a few moments of R2-D2 audio as the propagation went up and down. We had a good relaxed chat about the different styles of breakfast in our respective countries – Tyler was planning a Buttermilk and Cornbread breakfast!

A few hours later, I was briefly in the shack, doing some work on the computer – monitoring 70.200. I heard a little SSB a little LF of the calling frequency. It turned out to be a Spanish station operating from the coastal area near Alicante. He was using 10w to a small beam and I was surprised to work him with my small station. Interestingly it sounded like propagation was favouring the Oxfordshire area as he was hearing the GB3RAL beacon at Harwell, me and not much else! Shortly after our QSO he faded out and I’m sure that the propagation moved to favour another area of the country.

Two different types of contact – but both very enjoyable. Diversity is one of amateur radio’s strengths!

I’m suffering from a severe case of Android envy. I was just checking the latest post in Jeff KE9V’s excellent blog (glad you haven’t forsaken the blogosphere in favour of podcasts, Jeff) which mentions in passing that Google has just released AppInventor, a free simple application builder for the Android platform.

What piques my interest particularly is that AppInventor includes building blocks that allow you to talk to things like the GPS, so you can write location-aware apps, perhaps even apps that are APRS related.

I own a Windows Mobile smartphone. I also own a currently uninstalled copy of Microsoft Visual Studio, which can create apps for the phone. I once wrote an app to sync the clock to an internet time server. But like everything to do with Windows it’s all just too darn complicated and my ageing brain doesn’t feel like getting to grips with it.

The AppInventor approach looks much easier and more fun. I see an Android in my life before too long.

My new work laptop came this morning. It’s a Dell Inspiron 1764 with an Intel i3-350M(2.26GHz) Mobile CPU, 3GB of RAM and a 250GB SATA hard drive. It isn’t the most portable laptop, having – like the Toshiba it replaces – a full-sized keyboard and a 17.3in. widescreen display. It looks and feels absolutely gorgeous, the screen is superb, the keyboard perfect for my fat fingers, and it’s blisteringly fast. Click on the Firefox icon and the browser is there in a second or two.

What’s more, the Dell doesn’t cause any RF interference that I’ve noticed. The old Toshiba caused an increased level of hash that broke the squelch on my 2m FM receiver unless I cranked the knob round quite a way. Since I started receiving HF APRS I noticed that the Tosh caused a 3 S-point noise level on 30m as well, which all but prevented reception of any packets. So I am delighted with the new PC for that reason as well. I can now leave my radio station running all day as a VHF and HF APRS gateway while I work.

The old Toshiba had Linux installed on it early on in its life for security reasons plus the fact that Linux has some good web development tools. I was going to buy a PC with Linux preinstalled but I couldn’t find what I wanted so I resigned myself to paying the Microsoft Tax. The Dell came with 64-bit Windows 7. I thought that I should try it under Windows for a few days just in case there was a fault and I had to send it back. But to be honest I think I may stick with Windows. It looks more polished than Linux, it’s fast and I’ve already started to find replacements for the Linux tools I used. Firefox, which I spend most of the day using, looks and works exactly the same on both platforms, of course.

I certainly wouldn’t choose Windows 7 64-bit for a shack PC as there are too many compatibility problems with popular hardware and ham radio applications. But for what I need to do to keep the business running it looks like being a good choice.

A monumental task well executed this weekend as competitors from all over the globe competed for the top slot in the game. Thank you RadioSport Russia for delivering an excellent interactive Internet product! The team of volunteers who labored behind the scenes certainly set the standard for the next global competition.

Admittedly, are there any plans to merchandise WRTC ball caps and t-shirts in the future? Each rate shackadelic right on in my logbook!

Please check out WRTC photo gallery because the spirit of ham radio and the intensity of competition is found within; note Tim, K3LR and Andy, N2NT.

From my perspective, ham radio operating inside tents beneath the ionospheric dome, really captured the essence of RadioSport. The photographs of tents illuminated by the glow of transceivers and liquid crystal displays against the canvass of sunset sparked a kilowatt worth of inspiration.

Contest on!

Had a good day in the park with Jim K4AHO and Wally KG4LAL. Spent a good bit of time testing a couple tuners for End Fed Half Wave antennas using Jim’s AIM 4170. Wow is that thing a great tool for tweaking antennas! Info overload!

I built an antenna tuner based on AA5TB’s design for an end fed half wave antenna. I am using a 3 ft or so counterpoise on the ground as Steve suggests. On the analyzer in a test lashup it was a bit touchy to hand capacitance but tuned well even up to 21Mhz. Since I am not thinking of backpack size I used a pretty good sized enclosure for it. I am using an air variable 6-160pf cap instead of a polyvaricon like Steve used since space is not a big issue. I also used a T68-6 toroid instead of the T50-2 Steve used.

When I mounted it in a plastic box the sensitivity seemed to increase. I have not put a LED SWR bridge in the box yet, as I was waiting to see how it worked before adding more variables. Today I was able to put an AIM 4170 analyzer on it and it did tune the antenna… seems that the air variable I used is perhaps a tad small. It is almost fully meshed on 40m cw and on 20m it acts like even at minimum capacitance the sweet spot is very narrow and hard to tune.

Here's the innards

My question(s) are:
1) Is the hand/body capacitance normal? If not, what might cause it to
be so touchy?
2) Would my parts layout be part of the issue?
3) Does the DPDT switch (mini toggle) I added for later use with the SWR
bridge add significant capacitance to the circuit? I was able to match a
21Mhz load on the raw test setup, but not once it is in the box.
4) I have a small bus wire for a ground, do I need to increase that?
5) Is the plastic box the problem? Would it be better in a metal enclosure?
6) Am I asking too many questions? Sorry, this is how I learn. Build,
test, ask…

SWR bridge I want to use

Thanks for your wisdom and experience on this one.

72,
Kelly K4UPG