Spurious Emissions

AMSAT is offering a discounted satellite antenna package to members.  The package consists of two M2 antennas, one for 2m the other for 440, both circularly polarized.  Looks like a nice package at a decent price.  I’m going get this for the new bachelor pad QTH.  If you’re a satellite aficionado and not a member of AMSAT or another organization that launches birds, you should join and support one so we can keep satellites orbiting the globe.

Make has an article on how to turn your Raspberry Pi into a “pirate radio”.  This appears to be done all in software by outputting a high frequency bit stream on a GPIO pin.  The software will frequency modulate the carrier and it’s intended mainly to be a short range (i.e. unlicensed FCC Part 15 here in the US) FM broadcast transmitter you can play your tunes through while on the beach.  A more technical article, mentions it has 1 to 250 Mhz capability.  This might make a cool little exciter for QRP CW, with appropriate filtering to clean up what undoubtedly has a lot of odd order harmonics.

There’s this cool little Kickstarter project called Tsunami.  It’s an Arduino-based audio signal generator and analyzer.  Undoubtedly this could have some amateur radio applications, like generating and decoding digital modes.

One of the original Arduino founders who ran the main firm which manufactured Arduino boards is accused of going rogue and registering the Arduino trademark in Italy.  Arduino.cc is the original, core Arduino team and the Arduino LLC entity, and Arduino.org is Arduino SRL, the rogue manufacturing company.  Arduino SRL is no longer paying Arduino LLC royalty fees and Arduino LLC is now in a legal battle.  Any Arduino board that was purchased in the last year that was made in Italy did not have royalties go to the Arduino team which has been responsible for design, creativity, and energy behind the Arduino project.

BFDs

Some things are BFDs and some things just aren’t.  What are BFDs?  Well, son, this video might help you out.  BFDs would include passing healthcare legislation, your first kiss, discovering plutonium, or your parachute not opening.  There are two news items in amateur radio right now that, despite all the hubbub, aren’t BFDs.

Remote operation from anywhere is now allowed for DXCC awards.  ARRL will now allow contacts from remotely-operated stations to be submitted for DXCC awards, regardless of where the control point is located.  This seems to be a BFD for many people because of instead of buying a multi-giga dollar megastation, which was the previously accepted way to buy your way to DXCC, today with modern technology and better living through chemistry you can rent a megastation with a credit card and operate it with your favorite computing device from the comfort of your meager home station, hotel room, or police station drunk tank.  Why is it not a BFD?  Remote operation contacts were allowed for DXCC credit before, the only thing that has changed is where the control point is allowed.  The contact is still made over the air.  This isn’t like Echolink computer-to-computer contacts.  The remote station must be located within your home DXCC entity.  If you still want to get your DXCC the old fashioned way, you can.  DXCC is about personal achievement, and how you got it is a BFD to you, not anyone else.

The FCC will no longer issue paper licenses.  Why is this not a BFD?  There are several reasons.  The online ULS record is considered your official credential.  If you want a paper license, you can go to the ULS, download a PDF, and print it out.  One can also request the FCC send them a paper copy.  What is BFD is that the FCC will save $304K a year with this change.

Marketing With Morse Code

Code-is-not-dead prognosticators and hand-wringers will be happy to hear Asus is touting a new smartphone camera feature with Morse code.  The smartphone feature has something to do with dual cameras and exceptional zoom capability but unfortunately appears to have no use of Morse code.  But a tip of the hat to Asus marketing folks for using code!

Taking the Plunge

I’ve been considering getting a Raspberry Pi for awhile.  Several folks have asked me if I would port my Arduino Keyer code to it.  So I decided to take the plunge and acquire a Pi from Newark / Element 14, along with some “fixins”.  I got the Model A Pi, along with a WiFi dongle, and a cute little enclosure. IMG_4055

Big Things Come in Small Packages

I didn’t realize just how small the Pi was until I held one in my hand.  It’s just amazing this is a full blown computer.  It’s quite a leap from the VIC 20, the first computer I used 30 years ago as a teenager. IMG_4058

Raspbian Installation

The Raspberry Pi was surprisingly easy to fire up.  I bought a 16 GB SD card locally and burned a copy or Raspian on it.  After plumbing up a monitor to the HDMI port and connecting a USB keyboard and mouse, the unit booted right up, displaying messages familiar to anyone who runs Linux.  A few minutes later I entered startx and I was in XWindows.  Of course I just had to bring up a terminal window and verify this was really a ‘nix box and run top. IMG_4061

Nifty Little Pi Enclosure

Now that I have my Pi humming away, what projects should I do?  As I’ve mentioned a few folks have inquired about porting my keyer code to the Pi.  Googling around I found someone has ported the Wiring development platform , which is the basis for the Arduino environment, to the Raspberry Pi and aptly called it Wiring Pi.  Naturally it’s not 100% compatible and it’s not as easy as just plugging in the Arduino IDE and uploading compiled code.  I’m debating whether to take this approach of getting the keyer code to run under Wiring Pi, or just start from scratch with good old C and gcc for the compiler. I could get the core functionality going and then port over parts of the code from the Arduino for ancillary functions, if it makes sense.  Certain things don’t make sense to port, like the CW memories code.  On the Pi you don’t have to deal with EEPROM like you do on the Arduino.  Anything that needs to be persistent across reboots can just be written to a good old file on the file system.  While certain things like persistent memory and sound support are easier on a Pi, deterministic and precise timing, which is needed for CW timing, is challenging on a multi-tasking environment like Linux.  This realtime kernel may be just the ticket.

Compared to the Arduino, there aren’t a whole lot of interfacing pins on the Pi.  To really get the power of this board you need to do I2C.  I’m thinking about what it would take to port my antenna tuner to the Pi.  That project uses I2C for controlling many relays, but there is also a need to monitor the voltages of the SWR bridge.  The Pi doesn’t have this capability natively, so an I2C device would be needed to supply this functionality.

All in all the Raspberry Pi is a versatile and powerful little board.  To get my feet wet I think I’m going to write a little bare bones C and see if I can get a basic keyer working and see where this takes me.  This is going to be fun.

 

WRTC Radio and Software Data

wrtcThe World Radiosport Team Championship 2014 team has posted data on the radio equipment and software used by the teams.  There are a few interesting take-aways for me:

The top two radios used are no surprise, the Elecraft K3 by a wide margin at 64%, and the Yaesu FTdx5000 at 7%. The third choice surprisingly was the modest Kenwood TS-590 at 6% usage.  I’ve often thought this rig is one of the best in amateur radio today based on the price, features, performance, and value.  Despite Kenwood getting the number 3 spot with the TS-590, there was only one other Kenwood rig used, a single TS-850.  Ten Tec had a meager showing with two Orion II rigs.  Various other Icom and Yaesu rigs rounded out the statistics.  I find it sad that Kenwood doesn’t have more product offerings in these statistics.  The data suggests that there’s an opportunity in the market for another high performance $2.5K to $3K USD compact rig.

For software I expected the N1MM contest program to be the most popular choice, however Win-Test was used in 68% of the stations and N1MM garnered only 25% usage.  Perhaps it’s time I try Win-Test.  Despite the price of the N1MM program being attractive, the lack of source code for this freeware program has concerned me.  Win-Test costs 50 Euros or about $67 USD, however with the features listed it may be worth it.  There must be some “secret sauce” in the program that hardcore contesters like.

The Old Man

Hiram_Percy_Maxim2The several times I’ve read the writings of the Hiram Percy Maxim, I get the feeling I would have really liked this guy in real life.  I think a lot of his writings could be republished today with some minor editing of language and figures of speech that are no longer around, and the content and arguments would easily apply to current modern day situations and problems within amateur radio.  It’s amazing that as much as things change, things are still the same.

This article, Rotten Damped Spark Stuff, is a Maxim gem.  Considering Maxim’s feelings at the time about damped spark, I think Maxim would have been equally vocal during the AM versus SSB and code versus no-code test battles in favor of more progressive trends and technology in amateur radio.

Something interesting to note about the article, Maxim ends it with “So long and 73’s to the gang. “[emphasis added].  Any time a boob on the two US ham moron forums wants to argue about the inappropriate use of 73’s, quote this article and tell him to go away.

New Chapter

There’s no way to sugar coat this.  My marriage of nearly 21 years is over and my XYL and I are separating.  It’s been a rough past two months leading up to this (actually, come to think of it, maybe it’s been a rough few years), to the point where I’ve been physically ill thinking about everything from family to how will the grass at the house get mowed.  The emotions involved are overwhelming…. sadness, hurt, anger, hate, bitterness, uncertainty….relief…. But with every chapter that ends, a new one begins.

I’ve been house and building lot hunting, and getting an education on home owners’ associations, the bane of many a radio artisan.  I have a few good real estate prospects, one house in particular is ideal for an amateur radio QTH as it has a relatively high elevation, is wooded, has few other houses around, and I have information from a good source that the HOA is rather loosey-goosey.  It will be quite awhile until I can get a tower up again, so it’s back to basics with dipoles strung in trees.  Basics and simplicity appeal to me at this point in my life.  Now that I’m in my 40s and my daughter is heading to college next year I don’t need much of a house.  It seems most nice houses on the market here are just too big for me.  I’m looking at house plans in case I need to construct a home, as a “Plan B” option.  In any case I’ll probably settle on something that would normally be classified as a vacation cottage.

Despite the gut-wrenching situation with the marriage and my family, I’m looking forward to this transition and journey.  Outside of the mundane legal and administrative tasks that need to be completed and the grieving process with myself and the family, I’m somewhat excited about the transition.  While I’m losing a lot I’m gaining freedom and the opportunity to retool my life, simplify, be true to myself, and be happy.  Freedom and happiness have a lot of value, more value than material items.  My bucket list has expanded significantly and I plan to accomplish everything on the list these next 40 years.  I’m sure there will be a significant-other YL in my future after things settle down.  I hope to chronicle my journey here in the coming weeks and months.

Today I’m off from work, getting stuff done around the house and preparing for Field Day, one of my most favorite events of the year.  See you on the air this weekend!


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  • Matt W1MST, Managing Editor