News from the shack

The end of this month see’s the end of work based madness so I’m getting a few bits and bobs sorted out.

With the demise of the trusty (read rusty…or at least corroded in the special way that aluminium does) vertical I have order a hardware kit for a Cobwebb to go outside. it may get here by the weekend. I’ve been given a rather sorry looking mast that will polish up into a rather staely looking mast once I’ve spent some time on it and a few plastic bits and pieces from Seeedstudio for some of my bits and bobs that need tidying up.

Hopefully this Saturday it won’t be freezing cold or raining, although I’m told the time I’ll be running my part of our Red Nose Day 24 hour relay it will be chucking it down, so I can assess what needs to be done to get myself back on the air on HF and get my 50Mhz yagi up and ready for the season. Looking forward to some time on the rig Excellent!

 


Alex Hill, G7KSE, is a regular contributor to AmateurRadio.com and writes from Cumbria, UK. Contact him at [email protected].

A Quick RoIP Experiment

RoIP stands for Radio over the Internet Protocol and you can use this technology to connect remote radios over any distance, easily.

There are, of course, very complicated and elegant communications systems that do this already such as Echolink, D-STAR, Tetra and DMR/Mototrbo, but tonight I homebrewed my very own, modest private link in half an hour – and you can too!
If you have a rig with a packet data port and an external sound interface, such as a Signalink USB, then all you need is some software and a mobile phone, for example.
2013-03-13 19.49.59
Above: Signalink USB and FT-817 set to 2m FM calling….
I used a fantastic free app called Zello. Zello is a walkie talkie emulator for your smartphone but also has a PC programme counterpart. The clever bit is that it has a VOX function with several adjustments for sensitivity and delay. My project enabled me to talk remotely over 2m using my smartphone!
2013-03-13 18.34.55
Above: Zello app ‘PTT’ button
So, by pressing ‘PTT’ on my smartphone and making a direct call to my computer, the VOX switch was activated on my Signalink USB interface and my FT-817 transmitted. When the squelch was opened on my ‘817 by the station I was talking to (and this is the clever bit) the Zello programme on my computer used its VOX feature to transmit back to my smartphone.
zellovoxzello

 

 

 

 

 

 

 

 

Above: Zello VOX settings on PC and  Zello GUI on Windows XP

Now I know that Ham Radio Deluxe can be established to give full remote control over my rig, but that’s for another day. This is one solution to automatically link two radios that anyone can do.


Rob Law, MW0DNK, is a regular contributor to AmateurRadio.com and writes from Anglesey, Wales. Contact him at [email protected].

DX with a Kite Antenna

This afternoon Hanz, W1JSB and I met at the Franklin Falls Dam. Our plan was simple… lift a half wave wire with a kite and work some DX on 20 meters. We managed to work Belgium and the Ukraine… but it wasn’t all clear sailing.

kite2

We sat at a picnic table several hundred feet above the river. A stiff breeze lifted the kite about 80 feet into the air. We attached the far end of our 33 foot wire to a loop in the middle of the kite string. We connected the near end to the Par matchbox and then to the rig… an HB-1B running 4 watts. It wasn’t vertical, but it was a respectable sloper.

After a few calls, I worked ON8VP in Belgium. Peter gave me a 559 and we finished a quick exchange. His signal was strong, and I have no doubt that had the wire been vertical, I would have been stronger to him. But I was pretty happy to make a contact.

Next, I heard UY6IM in the Ukraine calling CQ. As the wind faltered and the kite lowered, Roman answered my call and gave me a 559. Then it happened.

down

The kite dropped below the hillside and most of the wire lay on the ground. Roman couldn’t hear me send his report. Fortunately, he didn’t hear me swear either. Darn it… (OK… Dam it.) Hanz raced down the hillside to recover the fallen kite. Right away it lifted into the sky again. By this time Roman was calling CQ again. I answered… gave him a 599 and called it quits after he acknowledged the report. Right after that, the kite dropped once again. It was frustrating.

Hanz wanted to give it a try, so I ran down and tried to get the kite airborne once again. No luck. We packed up. Of course, as soon as we did, the wind came up again. The experiment was fun, but I think I’ll stick with trees.


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

Handiham World for 13 March 2013


Pat Tice, WA0TDA, is the manager of HANDI-HAM and a regular contributor to AmateurRadio.com. Contact him at [email protected].

Show Notes #101

Introduction:

  • Russ flies solo on LHS! Well, almost. Harrison, VE2HKW, fills in as co-host.

Topics:

  • What’s in a name? Russ talks about the philosophical ramifications of the phrase “Linux distribution”, and referring to Linux vs. GNU/Linux. Richard Stallman prefers using GNU/Linux to refer to the operating system, and Russ seems to agree, but feels it doesn’t go far enough. Share your thoughts via the usual communication channels.
  • hamqth.com is an alternative to QRZ.com for callsign lookups, and has an application program interface (API). Russ has programmed the gnorman bot in the LHS IRC channel to access hamqth.com. While in the chat, enter “.qrz some_callsign”, and gnorman will return the info.
  • Another application that uses the hamqth.com API is QtLog. It’s mostly in German, but there’s enough English to allow you to use the program. It seems to require that you have a MySQL server running on the same computer. It also supports HamLib for rig control. You can use Google Translate to translate the website.
  • Harrison offers an overview of oscilloscopes, including what they are, the controls, and how you might use one in your ham shack. There are several instructional videos available on W2AEW’s YouTube channel. (You can learn more about Alan, W2AEW, on his QSL.net page. There are also software-based oscilloscopes, like xoscope. Of course, you’ll need a hardware interface to the computer’s sound card.

Feedback:

  • Please make a donation to our Dayton Hamvention fund, like these fine people: Paul G. (annual membership and 2 donations), Ron E. (yearly membership), Jeremy H. (monthly membership), Scott P. (monthly membership), Bill A. (monthly membership), Bill H. (monthly membership and donation), Gary U. (monthly membership), John K. (yearly membership), and Jerome S. (donation). Thank you, all!
  • Gary (KE2YK) expresses his appreciation for Richard’s screencast Introduction to JT-65.
  • Brian (WB4ES) sends his best wishes to Richard.
  • 100th episode audio feedback from Claudio of the Linux Basement podcast.

Contact Info:

Music:


Russ Woodman, K5TUX, co-hosts the Linux in the Ham Shack podcast which is available for download in both MP3 and OGG audio format. Contact him at [email protected].

New WSJT-X update

Hot news. I’ve just had an email from Joe Taylor K1JT informing me that a new version of WSJT-X, v0.6 r3045, has just been made available for download from the WSJT home page.

This is a must-have update which now includes spotting of JT9 signals decoded to the PSK Reporter website. (Tip: This needs to be enabled in Settings.)

Still to come are rig control – which I will hazard a guess will use hamlib – and integration with VK3AMA’s JT-Alert. Hopefully this will encourage current users of JT65 on HF to try the new JT9-1 mode which is 2dB more sensitive than JT65A and occupies less than 10% of the bandwidth.

Thanks Joe for giving us these great programs.


Julian Moss, G4ILO, is a regular contributor to AmateurRadio.com and writes from Cumbria, England. Contact him at [email protected].

The Cost of a Summit Activation

For those of us that chase awards, be it DX, Summits, Islands, etc...  we have all heard about the costs of expeditions and in many cases we individually choose to support those  that interest us the most. Costs for expeditions to rare places like Bouvet or Peter I can approach $400,000 or more. Those expeditions require ice class ships, helicopters and tons of equipment. Even a jaunt to rare IOTA qualifying island can run into the tens of thousands of  dollars. Major expeditions have found ways, other than greenstamps in envelopes, to fund their adventures, e.g,  by  offering online QSL requests for a fee and by just making it easy to contribute by accepting PayPal. Often times we will read what the cost per QSO was as the expeditions try to recoup their costs.

This brings me to the costs of my recent trek to the top of East End Summit in Arizona which qualifies for the Summit on the Air (SOTA) award. I was able to fit this into a business trip so it's hard to allocate travel costs to the expedition. I did rent a car to get to the trailhead and some food to eat on the trek and water to drink, none of these costs were outrageous. However, there was a huge expenditure that is worthy of mention and that is burned calories.. Using my "Lose It" app, I burned approximately 2,500 calories on my trip up and down the mountain. Given that this activiation took place on a weekday, the QSO's were limited with 18 QSO's made. So I propose a new measure of expedition economics, and that is, calories per QSO or C/QSO. With the numbers above my C/QSO ratio for this trip was 138.9 to 1. So to help reimburse me for my costs, it might be more appropriate to send me a pastry with the QSL request rather than a green stamp.

So the next time you need to drop a few pounds, maybe you should try the SOTA activation diet, it can burn a lot of calories.

Mike Crownover, AD5A, is a regular contributor to AmateurRadio.com and writes from Texas, USA. Contact him at [email protected].

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