Tag Archives: Homebrew

Raspberry Pi Satellite Tracker Interface How To

Source: Raspberry Pi Satellite Tracker Interface How To

We have received several requests to share the image and construction details for the Raspberry Pi Satellite Tracker Interface. We use the Sat Tracker interface with MacDoppler as part our Portable Satellite Stations. The Sat Tracker described in the article uses a Raspberry Pi Computer with a touch screen interface to interface MacDoppler to Green Heron Engineering RT-21 Rotator Controller(s). You can read about how to build your own Sat Tracker Interface via the link above.

Fred, AB1OC

2018 Club Meeting Retrospective

Regular Club Meetings

The Nashua Area Radio Society (NARS) meets every first Tuesday except in August when there is no meeting. (Note that months where the first Tuesday falls on a holiday the two monthly meetings may be pushed out a week.) The monthly regular meetings typically feature a speaker from outside the club that brings something interesting from the ham radio community, the world of science and technology, or local interest. There is also a January Show-and-Tell meeting, and the Field Day planning and retrospective meetings held in June and July.
Here is a quick run-down of the presentations made to NARS over the last year.

February

Global Ionosphere Radio Observatory
Dr. Ivan Galkin, University of Massachusetts Lowell
We use the ionosphere for HF communications, but did you know that changes to the ionosphere can also affect GPS systems? Dr. Galkin described his groups work creating a system of Ionosonde stations to measure the ionosphere. And all this is done just up the road at the University of Massachusetts, Lowell.

March

Theory and Repair of Astron Power Supplies
George Allison, K1IG
Linear power supplies will eventually fail, but they can be repaired easily if you have a little know-how. George Allison walked through the design and theory of these devices and showed how easy it can be to get a dead unit back on the air.

April

The Current State of the D-Star Evolution
Terry Stader, KA8SCP
The proliferation of digital radio hotspots using Raspberry Pi and Arduino computers has been astounding. Terry Stader walked through some of the advancements of the D-Star ecosystem and other digital radio platforms.

May

MIT Haystack Observatory
Phil Erickson, W1PJE
One of the nation’s premier observatories is located just miles from Nashua. Phil Erickson gave us a virtual tour of the facilities.

September

BITX and µBitX Transceivers
Andy Stewart, KB1OIQ
Ashhar Farhan, VU2ESE, created a very low-cost transceiver that could be constructed by anybody in his native India with commonly sourced parts. The designs became an instant sensation in the QRP radio community. (Farhan was recently inducted into the QRP Hall of Fame.) Andy Stewart gave us a good overview of the BITX and µBITX technologies and even showed us some extensions for the radio to support visually-impaired operators.

October

Working the ISS and Satellites
Fred Kemmerer, AB1OC
Here at the bottom of the solar cycle it is good to broaden your experiences. Fred Kemmerer gave an excellent overview of the basics of satellite communication, including working the International Space Station.

November

Nashua Emergency Coordinator
Justin Kates, KB3JUV
Communications is an important part of any emergency situation planning. Justin Kates briefed club members on the planning and preparation Nashua makes for any emergencies.

December

Plane Tracking with ADS-B
Thomas Kavanaugh, KC1ELF
Most aircraft are now fitted with a system called ADS-B, part of the new system of anticollision technologies. Data is broadcast by each aircraft on 1090 MHz and that data can be received and decoded by a simple ground station you can build on a computer as simple as a Raspberry Pi. Thomas Kavanaugh gave the club an overview of this technology.

Tech Nights

NARS holds a second meeting of the month a week after the club’s regular meeting. “Tech Night” is a chance for club members to exchange ideas and share their knowledge and experiences. Many of these meetings are captured in video and archived on the NARS website https://www.n1fd.org You can access the video collection here https://www.n1fd.org/video-collection/ Remember that you must be logged into the website to have access to these web pages and materials.

January

Building a Mobile HF Station
Fred Kemmerer, AB1OC
Video available

February

Kit building night
Paddlestick touch keyer by K1EL

March

Antenna Modeling I
B. Scott Andersen, NE1RD
Video available

April

Basic Kit Building Techniques
Steven Elliott, K1EL
Video available

May

Portable Operating and Gear
Video available

June

All About Field Day
Video available

July

Raspberry Pi and Ham Radio
Anita Kemmerer, AB1QB and Jamey Finchum, AC1DC
Video available

August

WSJT-X
Fred Kemmerer, AB1OC
Video available

September

DMR Radios and Programming
Bill Barber, NE1B
Video available

October

Frequency Measurement Challenge
George Allison, K1IG
Video available

November

Remote Operation
Fred Kemmerer, AB1OC

December

RTL-SDR workshop
B. Scott Andersen, NE1RD
Club members were encouraged to bring their SDR solutions to the meeting and either seek help from other club members or provide help to those seeking to get their systems running. There were many newly working SDR systems at the end of the evening.

NARS 2018 Meeting Topics

DateMeetingTopicPresenter
JanuaryRegularShow-and-TellClub members
JanuaryTech NightBuilding a Mobile HF StationFred Kemmerer, AB1OC
FebruaryRegularGlobal Ionosphere Radio ObservatoryDr. Ivan Galkin, UMass Lowell
FebruaryTech NightKit Build: Paddlestick Touch KeyerClub members
MarchRegularTheory and Repair of Astron Linear Power SuppliesGeorge Allison, K1IG
MarchTech NightAntenna ModelingB. Scott Andersen, NE1RD
AprilRegularD-Star + Bishop Guertin Robotics teamTerry Stader, KA1SCP, and students from Bishop Guertin High School
AprilTech NightKitsSteven Elliott, K1EL
MayRegularMIT Haystack ObservatoryPhil Erickson, W1PJE
MayTech NightShow and TellClub members
JuneRegularField Day Planning MeetingClub members
JuneTech NightField Day Skill BuilderClub members
JulyRegularField Day RetrospectiveClub members
JulyTech NightRaspberry Pi and Ham RadioAnita Kemmerer, AB1QB, and Jamey Finchum, AC1DC
AugustRegular** No meeting this month **
August Tech NightWSJT-X and FT-8Fred Kemmerer, AB1OC
September RegularBitX40Andy Stewart, KB1OIQ
September Tech NightDMR Radios and ProgrammingBill Barber, NE1B
OctoberRegularISS and SatellitesFred Kemmerer, AB1OC
OctoberTechFrequency Measurement Challenge: Ideas and StrategiesGeorge Allison, K1IG
NovemberRegularNashua Emergency CoordinatorJustin Kates, KB3JUV
NovemberTech NightRemote OperationFred Kemmerer, AB1OC
DecemberRegularPlane Tracking with ADS-BThomas Kavanaugh, KC1ELF
DecemberTech NightRTL-SDR WorkshopClub members

Kit build for February 2019: Morse Tutor Keyer

Morse Tutor Keyer Kit by K1EL

Kit build for 2019

The change of seasons brings us again to the darkest months, a good time to concentrate on indoor activities  like station updates and kit building. This February 12th the club will hold its annual kit build during Tech Night. The kit selected this year is the Morse Tutor Keyer Kit by K1EL. You can have a quick look at the manual for this kit here.

Club buy of kits

As part of its STEM initiative, NARS has purchased a number of these kits in bulk and has been using them in student kit builds in local area schools. Buying directly from the club means getting a discount on the kit, and directly supporting this educational outreach.

BUY THE KIT HERE: MTB-KIT order page

What to bring to kit build night

The kit will supply the board and parts necessary to complete the project. You’ll need to bring appropriate tools including:

  • Soldering iron and solder
  • Small needle-nose pliers
  • Small diagonal/flush cutters for trimming component leads
  • Small flat blade and Phillips head screwdrivers
  • Your reading glasses (a note to myself, if no one else!)
  • A printout of the manual for the kit (or a copy downloaded to your tablet)
  • Recommended: Multimeter
  • Optional: a small magnifying glass

Don’t forget to bring batteries! The unit requires 3 AAA cells.

The spirit of kit build night

NARS has many new members since the last kit build. Those of us who have experience with kit building should lend a hand to those new to the adventure. Take a moment and help mentor your fellow club members, especially our youngest recruits, so they walk away with a working kit and the sense of accomplishment that goes with it.

Remember: Watch for the link on the website for ordering your kit.

Radio Amateurs Developing Skills Worldwide