Second Sunday Tech – January 2019 is RTL Dongle

Join us for our monthly Tech Session. RTL-SDR is the subject this month. If you’re new to these devices, bring yours along with a computer (laptop/raspberry pi) and we’ll help you get started. I’ll cover how to fine tune the device and show how you can use an upconverter, such as the Ham it Up, to listen to HF. And we’ll discuss some other handy uses for them as well.

If you’re already experienced with it, feel free to bring your favorite RTL-SDR project to show the group.

If you don’t have a device yet, they can be purchased online ranging for about $15 to $20, for a base model. (Amazon, Ebay, etc.)

Hope to see you there.

Sunday January 13, 2019 2:00 pm

PDK Airport, 2000 Airport Rd., Atlanta, GA 30341

Upstairs in the Admin BLDG – Angel Flight Room

Second Sunday Tech – October 2018 is In the Park

It’s that time of year again for some outside radio fun! Join us at Tanyard Creek Park on the belt line on Sunday October 14 at 2:00 PM. Some of us may be there a little earlier.

Bring a radio or an antenna or both. Don’t have a radio or a license? That’s OK – you can still get on the air with one of our rigs!

See you there!

Here’s a map to Tanyard Creek.

December 2017 Second Sunday

Atlanta’s (un?)predictable Fall weather rained out our last two Second Sunday events,  but we are back and indoors for our December Second Sunday on the 10th.

Come join Alan WA4MO as he leads all with a 2 meter J-pole build using ladder line. This roll up version is versatile enough to store in your back pack or suitcase for an LX or DX trip or you use it at your home for those Sunday Night ARC Nets on the 146.820 repeater.

Builders are limited to the first 10 people and should email Alan – [email protected]  to reserve a kit.

There is a fee of $10 for each antenna kit – includes 5 feet of coax, 5 feet of ladder line, and a male PL-259 connector. We have a couple of soldering irons and a little solder but you are welcome to bring your own solder and iron, and a different coax connector if you prefer.

The build is at the usual place – PDK Airport on Claremont Road in Room 227 of the Administration Building. We will meet from 2:00 – 5:00 PM on Sunday, December 10.  Talk-in is on the 146.280 ARC repeater.

And remember, from 12 noon until 2:00 PM we have free amateur radio license testing in the same location.


See you there!

September 2017 Second Sunday Tech Topic

Join KW4MO Alan on Sunday, September 10, 2017 at 2:00 PM – 5:00 PM for our next Second Sunday Tech Meetup:

We’re building a Function Generator and learning some oscilloscope basics. You can signup on our meetup event:

And don’t forget we have free Amateur Radio testing at the same PDK location from 12 noon until 2:00 PM. Studying for your first license or an upgrade? This is the place to test – did we mention the testing is FREE?!?

July 2017 Second Sunday Reminder

WSPR on Raspberry Pi & QRP Filter

Project Description

There are a several options for this session:

  1. Build a QRP Filter (Low Pass Filter, specifically, one of these)

  2. Setup a Raspberry Pi for WSPR transmission, using the QRP Filter to enhance the TX.

WARNING: This project has the potential to damage your Pi. Though we’ll take great precautions to prevent that, I recommend using one of your older Pis or one you’re okay with potentially frying. The project involves connecting the clock pin directly to an antenna, which has the potential for feedback current above what it can handle. We’ll use a Schottky Diode on that pin to try avoiding that.

  1. As usual, you are welcome to just come hang out and get to know some fellow hams.


To recoup the cost of the components, we ask for a $5 donation if you build a QRP Filter. You can just bring cash to the event or pay via PayPal.

What to Bring

Project 1 – Filter Only (20m or 30m): No need to bring anything, I’ll have a couple of soldering irons and solder as well as the kit. You’re welcome to bring your own iron, solder, and if you do, something to set down under your work area (cardboard or silicon mat). That does tend to speed the build up a bit.

Project 2 – Bring a Raspberry Pi, preferably older or that you’re okay with potentially damaging (see warning above). Also, you’ll need to be able to SSH into it, so it needs to be a WiFi capable Pi or one that has an Ethernet port. (edit) Or have a display and keyboard for direct commands. Also, don’t forget your SD Card to run the OS. I’ll have an image with WsprryPi already loaded, as well as the WiFi password.

NOTE: TXing on 30m requires a General license or above, however, the WSPR range on 20m is within the range for Technician level.

If you don’t have a Pi, you can purchase one locally at MicroCenter or online from many different retailers, including Amazon.

Hope to see you there!

P.S. We’ll also be conducting a FREE license testing session from 12 PM until 2 PM, just before the tech session, same room. So if you’ve been meaning to get that test out of the way, this is also a good opportunity for that as well.

To sign up and get directions go to the MeetUp site by clicking here:

2:00 PM at PDK – see you there!

January Second Sunday

The January Second Sunday event, which is tomorrow, will be a live build of the two “Easy as Pi” projects from Thursday’s meeting. Come and see just how easy it is to build these projects.

Additionally, sorry for the late posting. I thought I posted this earlier but apparently it slipped my mind.

Edit: The presentation from the Thursday meeting is here.

December Tech Session – Coax and Connectors

From Bill Perkins, KB4KFT:

November’s Second Sunday Tech also had a discussion about what to do in December and a Coax and Connector was requested. Since no one there objected – we’ll do it.

Be sure to check the bottom of this message for preview of 2017!

Sunday, December 11th, Tech Session Meeting – Coax and Connectors

The December 2016 monthly meeting of the “Second Sunday Tech Session” will be Sunday, December 11th at 2:00p in the main conference room at the main administration building of Dekalb Peachtree Airport (PDK) in Chamblee. The building is at the end of the main entrance to the airport – just follow the road off Clairemont down to the cul-de-sac parking lot at its end. The conference room is in the building marked “Epps”. Come in the main entrance take the stairs at the left, the room is on the left at the top of the stairs – room 227. Talk-in (unofficial) is on the 146.820 machine (minus with 146.2 PL) Most times simplex 146.520 is also monitored.

The address to PDK is:

Angel Flight Room (224)
Dekalb Peachtree Airport (PDK)
2000 Airport Rd
Atlanta, GA 30341

We will be learning how to build PL-259 connectors and doing them (this is “hands on” sessions after all), building SO-239s, learning and building Anderson Power Poles, ringer and spade terminals, and fixing whatever needs to be fixed.

Also, of course, when dealing with these things you also need to learn techniques for soldering, crimping, stripping insulation, and so on. And my favorite, blow-torch use.

This is a general “bring what you are working on” sort of session where we will deal with about anything that comes in the door.

So if you have coax and need connectors on it, bring it on, power poles, same. Any sort of wire you need attached to something, bring it too. And if you have learned something interesting and want to teach others, come on down and join us. This is not a repair service but a chance to learn some basic skills of repair you can use yourself or pick up some tricks someone else has learned. And of course, have a good time. Some snacks and soft drinks will be provided, feel free to bring your own to share too.

See you there and then.

Coming up in 2017

As a heads up: January 2017 will be the also famous Soldering 101

January – The also famous Soldering 101 by Michael, KD4SGN. Getting ready for long winter kit building it is important to know not only how to solder but how to maintain the tools and supplies. Michael covers everything from getting started to advanced stuff. More on this session as we get closer.

Folks are encouraged to bring soldering iron and there will be stuff to practice on.

January program is now TBD.

February – May be an outing in the park… again out of discussion at the November session. We’ll need to get closer to the date to see what weather is like, But portable operation for VHF/UHF/DMR/DSTAR seems to fit as we enter Tornado Preparedness time in early February. More as we get closer. Make your base into a portable, make you HT into a base.

March – Portable operation… getting “rovers” ready for the Georgia QSO Party. This may include building quick up/quick down antennas, power connectors, choke building, etc. We will decide what this is based on what subjects come up over the next two months.

April – We may make this one a Saturday and/or Sunday GQP park outing.

May – Always is an outing in the park. Always good weather too, except once and then we were all under cover so it was more than OK.

June – Preparation for Field Day – hands on portable ideas plus whatever – this too will develop as we get closer.

Half a year half planned.

November Second Sunday

The following is the announcement for the November Second Sunday event (November 13th) from Bill Perkins, KB4KFT:

This month we are going to meet and discuss setting up a series of CW classes: how to do it, what we need to do, and what would the radio community like to get out of such classes.

Many people now are getting involved in CW. Once it became optional lots of people, after getting licensed, decided they want to start using it, that they were missing something by not using it. Second Sunday has always been about doing things – hands on activity – and this fits that real well.

If you are interested in learning CW, already know CW and want to get better, or are OK with it and like to share what you know, please come to this meeting. This is a planning meeting – input here is important as we will use that to set up the entire program.

The thinking now is the CW classes will be on the fourth Sunday of each month with a way for the group to get together on-line as weekly or more often if needed. This will be an ongoing class with people progressing as far as they want to progress.

If you have a test key/keyer bring it Sunday. If you have any materials you have used in the past to work with CW bring that along too. The more we know upfront the better we can do, right?

Same place: PDK Airport – Dekalb Peachtree Airport Room 227 (top of the stairs near the guard’s office, 2pm eastern whatever-they-call-it-now time).

Come prepared to share your ideas and be part of the solution to the problem of “how do I learn CW?”

The address to PDK is:

Angel Flight Room (224)
Dekalb Peachtree Airport (PDK)
2000 Airport Rd
Atlanta, GA 30341