Sunday, April 2, 2017

Interesting Ham Radio Podcasts



If you are not familiar with the term, podcasts are downloadable audio files that you can listen to on your smart phone, tablet, or computer. The term was originally coined in the early 2000s by joining the words "iPod" (the first commercially successful MP3 player) and "broadcast". When you lead a busy life, podcasts present an opportunity to keep up with interesting subject matter while attending to other chores like walking the dog, exercising, washing the car, etc. If you have a commute that takes significant time, podcasts are a great way to make that time go quickly. I listen to A LOT of podcasts, many hours worth every week (audio files compress very nicely), addressing a dizzying number of subjects. In both the Android and Apple iOS ecosystems there are several "podcatcher" apps that allow you to subscribe to a show and automatically download new content as it becomes available. The apps also help with content management; for example, what to do with a show after you've finished listening to it. Overcast (iOS) is my app of choice and it is set to delete the episode when I'm done, saving space on the phone. Most podcasts have "show notes" web pages where you can find web links to topics or items discussed on the show. Overcast embeds the show notes right in the app to make follow up extremely easy.

Here are a few ham radio podcasts I find interesting, perhaps you will too:

ARRL The Doctor is In;  with Joe Hallas W1ZR and Steve Ford WB8IMY
A short 20-30 minute podcast produced every two weeks or so by the ARRL, covering a wide array of technical topics in amateur radio. Very high production value, tightly scripted, highly educational. 5 out of 5 rating, especially for the new ham but those of us that have been in the hobby a while will learn things as well. 



Ham Radio 360; with Cale Nelson K4CDN and interview guest. While a relatively new ham, Cale had a previous career in FM broadcasting and it shows. Very high production value, by which I mean great sounding audio, tasteful intro and outro music, and minimal advertising interruptions. This podcast has only been in its current form a little over a year and was previously the FOTime Podcast. After some listener feedback Cale took the show from just recording some friends discussing amateur radio topics to a commercial quality endeavor. Cale is a great interviewer and makes subjects that aren't necessarily my "thing" interesting to listen to. 5 out of 5 stars, look forward to this one every other week.



Ham Radio 360: Workbench; with George Zafiropoulous KJ6VU and Jeremy Kolonay KF7IJZ.
George and Jeremy started out as co-hosts with Cale Nelson K4CDN on the Ham Radio 360 show but now have spun off into a new show focused on the building/making aspects of ham radio. To be honest, it took a show or two for George and Jeremy to gel as a team but they are working great now. Lots of good technical content that is easily accessible to almost any ham with out being too basic. The show just completed an Antenna Analyzer build project and are in the midst of designing a DC power management accessory. Workbench is released on opposite Tuesdays from the main 360 podcast, so there is fresh content very week. This is an up and coming show, don't miss a minute of it!




QSO Today Podcast; with Eric Guth 4Z1UG and interview guest. Eric is another talented interviewer and his guests comprise the entire spectrum of ham interests. Contesting, DXing, homebrew, QRP, VHF, moonbounce, you name it, Eric has interviewed at least one of the leading lights in the hobby on any particular subject. His guests are a diverse mix of amateurs from all over the globe and the interview is always a deep dive. High quality production, excellent content.



ICQ Podcast; with Martin M1MRB/W9ICQ and Colin Butler M6BOY along with rotating cast of co-hosts discuss general ham radio topics with a distinctly British flavor. The first half of the show is a round table news and current events discussion followed by topical monologue with Martin. It's a very general interest program recommended for newer hams or someone that wants to hear more of amateur radio from a European perspective. Good production value and content, produced fortnightly.



The Soldersmoke Podcast; with Bill Meara N2CQR and Pete Juliano N6QW. Soldersmoke is the granddaddy of ham radio podcasts in continuous production for almost 10 years. The show has gone through several iterations starting with Bill and Mike KL7R (SK) from Juneau, AK talking about QRP operating and home construction. Bill is a diplomat for the US State Department and during the early years of the podcast we follow his exploits with his family starting in London and later moving to Rome. The podcast was an outgrowth of their Skype conversations that Mike posted on the internet for anyone that was interested. Almost as interesting as the homebrew and QRP discussion were Bill's "travelogue" segments, seeing the DX side of ham Radio from an American ham's perspective. At one point the podcast went silent for several months after MIke was killed in a car accident while on vacation in Hawaii. After a time Bill took up the podcast again as a monologue and Soldersmoke morphed into a more radio talk show format while still focusing on homebrew electronics, QRP, some amateur astronomy and travelogue thrown in. The third turning of the show occurred after Bill and family returned to the US, settling in Northern Virginia. The episodes got a little intermittent for a while, then Bill started doing interviews as part of the show. In late 2015 and early 2016 he had an excellent series with Peter Parker VK3YE (check out Peter's YouTube channel if you like homebrew electronics and portable operating from 'Straya mate https://youtu.be/WnSa1_99QAE

About a year ago Bill found a new regular co-host, Pete Juliano N6QW. Pete is an inveterate home brewer, but surprisingly not big on CW so the podcast has taken a bit of a turn to SSB and higher power construction projects. Bill and Pete have a super personality chemistry kind of like the ham radio version of the NPR classic Car Talk. Highly, highly recommended, even if you don't build radios. Produced approximately monthly.

On the podcast you may hear an occasional reference to the K2ZA Memorial DX-100; after my Dad passed away I was finding homes for equipment that I just didn't have room for. On one of the episodes around that time, Bill was lamenting the loss of his beloved Heathkit DX-100 transmitter, from his youth, that had been "disposed of" by his parents while he was in the Army. I contacted Bill and offered my Dad's DX-100 to him and made arrangements to deliver it to the "wilds of Northern Virginia". Bill and his family are some of the most lovely and gracious people I've ever met, they made the delivery a real special occasion.




So this was just a review of ham radio oriented podcasts that I subscribe to, I hope you find them interesting and enjoyable as well.

73 de John K2ZA



















Thursday, July 28, 2016

Frugality in the Ham Shack






Lately, I've been embracing my ham frugality and it feels pretty good. Here is a Dell Latitude E5500 that I rescued from a dumpster at work a couple of years ago. I had made some halfhearted attempts to use it but it was painfully slow, taking upwards of 5 minutes to boot up and  in general was a real slug. It spent most of the last year or so collecting dust but I needed another computer in the shack so I was motivated to try and make it a productive member of society again. After adding the maximum amount of RAM (4 GB, $26.50), and new SSD hard drive (256 GB, $$79.99), a new LiOn battery pack ($24.88),  and installing Linux, I've got a reasonably zippy machine for around $130. The Linux distro I selected was Ubuntu 16.04 LTS and its running very nicely. I like Debian distros since I have a fair amount experience with it, owning several Raspberry Pi's. I would have preferred to use the actual Debian distro, rather than a derivative, but there are several drivers that the Dell needs that are proprietary closed source (most noteably the Wifi card) and I didn't feel like hunting down the closed source drivers and installing from separate media. I'm a an open source fan when I can be, but I'm also lazy, err, efficient and Ubuntu has the closed source drivers included so it got the job done in one fairly pain free step. Keep an eye out at yard sales, flea markets, and thrift shops, some useable computers can be found for cheap. If the seller says it's slow running Windows, has problems with viruses, etc., that machine is a prime candidate for a second life as an awesome Linux computer. Take a live Linux USB stick with you to evaluate the PC if you're able to power it up before purchase.


Ubuntu Linux

Thursday, July 4, 2013

Why APRS is boring...and what can be done to fix it


As my friend Cory Sickles WA3UVV eluded to in his article in the June issue of Crosstalk (the newsletter of the Gloucester County Amateur Radio Club), APRS did indeed contribute to the demise of traditional packet radio (along with the advent of ubiquitous Internet e-mail). Like traditional packet radio, APRS is an underutilized yet very valuable ham radio tool that still has much useful life left in it.

While traditional packet radio and APRS are both built on the same underlying technology, they way they both operate and their use cases are very different. Traditional packet radio is connection based, to communicate with another station you must issue a connect command like [C]onnect WA3UVV. This establishes a virtual circuit between my station and Cory's, when my station sends a packet his station will [ACK]nowledge it. This back and forth continues while data is flowing between the two stations. When the session is complete I [D]isconnect from WA3UVV and both stations are available for use. This same paradigm works whether it's two user stations connecting or a user connecting to a digipeater or BBS. Unless specifically configured, the TNC will only support 1 connection or virtual circuit at a time. While in a connected state, the TNC will not show me any other traffic going on the frequency, unless I specifically send a command to enable that functionality.

Conversely, APRS is a connectionless (or broadcast) system. There are no ACK messages passing between two stations, all packets are a special type called UI (Unacknowledged Information) and simply launched into the ether. Since there are no virtual circuits or connections, all the information that needs to be sent must fit into one packet, making brevity the watchword for operation in APRS. Since there are no connections in the APRS flavor of packet radio, you see all the traffic going on around you, and that is by design. Bob Bruninga WB4APR, the creator of APRS, had the concept of a real time information exchange system; the free exchange of data throughout the system is the value proposition of this mode. Connected mode packet radio excels for message transmission, especially when the person you want to communicate with is not on the air (just leave the message on a BBS or personal mailbox). The meat and potatoes of APRS are things happening and people participating in realtime. Fortunately for anyone interested in either mode, you don't have to make a choice, the equipment for both is the same, just use different (free) software.

Cheap GPS receivers are the single greatest cause of the boredom of APRS. Bob Bruninga has ranted (for years) that APRS stands for Automatic PACKET Reporting System, not Automatic POSITION Reporting System. Users can participate fully in the system without a GPS, the introduction of cheap GPS receivers got everyone distracted with vehicle tracking and losing sight of all the other rich features available. Bob's design intent was for a system that hams could use to find out about whatever interesting things are going on in their area. Broadcasting about nets, meetings, text messages, weather and road traffic information, local voice repeater information, and points of interest locations are all examples of valuable ham radio situational awareness items. Are several hams at a diner for lunch and want to let other hams know to come on down? Put it on APRS! Having a tech session at the club house? Put it on APRS! Rag chew net coming up? Put it on APRS! Want to show people where the hamfest is? Put it on APRS! If you use Twitter, anything (ham radio related) that you might tweet about would work great on APRS. I could go on but I think you get the idea.

Here are some examples of behaviors I have seen, using APRS, that contribute to increasing the boredom factor:

Broadcast the position of your car, 24x7, especially if you are not in it. Really, I couldn't care less where your car is if you aren't in it.
Broadcast the position of your house, 24x7, especially if you're not home. Again, if you're not available to communicate what's the point? Though if your house starts to move you probably have larger issues to be concerned about.
Broadcast a message that says "station unattended". Stating the obvious is not a real effective way to win friends or influence people.

I don't mean to sound like the grumpy old man here, or the arbiter of all things APRS, but my simple rule is "if I'm available to communicate, the APRS is on, if I'm not, it's off".

APRS can be an exiting adjunct to other ham radio activities by letting other hams know you're doing something interesting, fun, or of service to the community. You can advertise what repeater you are listening to, have a text message chat with a friend, or let people know of a traffic jam on a busy road. The possibilities are limited only by your imagination. If you'd like to know more, e-mail k2za@arrl.net or send an APRS message to K2ZA-1.

Sunday, September 16, 2012

Ham Radio on the Batona Trail

This is Scout and he was becoming a pest, as he does when he needs some exercise. I decided we both needed a nice long hike on the Batona Trail in Wharton State Forest. Since all my antennas are down at home, and most of my gear is over at the new place, taking the first module of my go-kit would give me the chance to do some field operating.





We stopped after a few miles and took a break. Here is the first module of my modular go-kit perched on a log. The radio is a Yaesu FT-817ND with a Miracle Ducker TL antenna and 33' counterpoise attached to the radio ground stud. It was getting late so I only had about half an hour of radio time available, so I was unsuccessful making any contacts. This was my first long hike with the Maxpedition Sitka pack, it was pretty heavily loaded at 18 lbs, but remained very comfortable for the whole hike (about 6 miles). Next hike will have to happen earlier in the day so I have more time to stop and operate.





Here is some video of some attempted contacts on 20 CW (my favorite mode).

For more information on my modular go-kit click on these links:













Saturday, September 15, 2012

A bittersweet day...

video

The realtor said to me "John, if you really want to sell your house, all this ham radio... err... stuff has to disappear". My wife and I are going to purchase my mother's house and I don't fancy becoming an absentee landlord so I have been dismantling the radio shack, the basement, the antennas, and my antenna tower. My Dad helped me install the tower in December of 1987 and has been up until today; for the first time in 25 years I'm completely off the air at my house. That's the bitter part, the sweet is the 50' Glen Martin aluminum tower at the new house. The new install needs some service work, new cables, and lightning protection but it will be a huge upgrade when completed. Watch the video above to see the tower being lowered and loaded onto a trailer to it's happy new home.

Thursday, April 12, 2012

Finished!

Well, I'm about 4 months late but here is the finished Red Hot Norcal 20. Purchased in 1999 and completed in 2012. The rig spent several months on the shelf because I got very frustrated chasing down a problem with the mute circuit which was absolutely vexing. When I had cooled off enough to think rationally, I posted a help request to the QRP-TECH group on Yahoo. Steve "Snort Rosin" Smith pointed me in the right direction (thanks for the e-mail!). I also downloaded the Spring 1999 issue of Norcal's QRPp journal (which they have thoughtfully posted on their website) that has the theory of operation of the rig. Ultimately I had a bad 2N3906 transistor on the TX +12 circuit along with the wrong resistor at location R99. R98 and R99 make a voltage divider that biases the base of transistor Q21 so that the +5 VDC from pin 5 of the TiCK keyer chip (U9) will turn off Q21. When Q21 turns off, it removes power from certain parts of the receiver circuit thereby muting it so the transmitter doesn't overload the receiver when in transmit mode. The bad 2N3906 (Q20) revealed itself when I was probing it's collector and found that the voltage went negative during transmit rather than going to +12 VDC.

Several more evening sessions had the radio completed but now I had a new problem, the receiver was deaf as a post! It turns out that when I was winding and installing T2, I got the primary / secondary leads mixed up so the signals were not getting out of the bandpass filter. That was very easy to correct but I took the opportunity to rewind both T1 and T2 to make a neater job of it.

Overall, it was a really fun radio to build, aside from the rework I had to do (which was my own fault). Hopefully one day very soon 20 meters will be open when I'm home to operate and I can get that first contact with the Red Hot Norcal 20 in my logbook.



Norcal QRP Club

Sunday, December 18, 2011

Red Hot 20 Update

With the cooler weather finally upon us I've had time to turn my attention to the Red Hot 20 project. I'm coming up on the 50% completion point and am currently working on the receiver section. The VFO, Audio Frequency Annunciator (AFA), and keyer have been assembled and function tested; happily the magic smoke stayed in all the components on power up.

For all those who may not be familiar with the dark arts as relates to electronics, all these devices run on magic smoke and when you do something to cause the release of said magic smoke the device will no longer function. ;-)

One of the really nice things about this kit is the way the designer, Dave Fifield AD6A, thought about the builder. The radio goes together in stages with power-up and performance checks along the way so there are no surprises when the rig is finished, you know it will work. I had a small solder bridge on the pads of the switch that controls the keyer which caused it to stay in command mode and I was easily able to find the problem and fix it because there were so few components on the board, it made troubleshooting a breeze.

When I get to the receiver alignment portion of assembly, I intend to produce a YouTube video of the procedure to aid others who might be building this rig or happened to acquire an already built one. I'm going to use an audio spectrum analyser program on my Mac to set the BFO sideband and check the filter shape. I learned this technique building several Elecraft K2s and once you understand the concept it works very, very well. Unfortunately I don't currently own a calibrated signal generator, it would be nice to check to see if the Minimum Discernable Signal (MDS) in my built unit is as good as the radio's specification (-135 dbm which puts this rig's receiver in the same class as an Elecraft K2).

One great piece of news, Doug Hendricks KI6DS, proprietor of Hendricks QRP Kits has purchased the assets of Red Hot Radio:

     December 1, 2011 I am pleased to announce that Hendricks QRPKits has purchased Red Hot Radio       Company, owned by David Fifield, AD6A. With this purchase, I now have the exclusive rights to produce and sell all of the Red Hot Radio Kits, including the Red Hot 40, the Red Hot 20, and the SMK-1. Red Hot Radio produced some of the highest quality kits for several years, but was closed due to Dave not having the time to run the company because of his day job. Now, those kits will again be available. The first kit that I will bring back online is the Red Hot 40, and it is available for shipping now. There are 35 kits in the first run, all on 40 meters. The next kit will be the SMK-1 which will be available in about a month. I encourage you to go to the website, www.qrpkits.com and check out the manual for the Red Hot 40. The kit will sell for $250 plus shipping and handling. And the kit is in stock and available for immediate shipping. 

If I can manage my time well, there is a possibility that the Red Hot 20 will be completed in time for the G-QRP club's "Winter Sports" activity. It's a non-contest that runs from Christmas to New Years to encourage QRP ops to get on the air; with the current level of sunspot activity working Europe on 20 meters QRP should be easily achievable.

Hendricks QRP Kits

G-QRP Club