I'm testing a TrackSoar APRS tracker before near space season begins in earnest. If you haven't seen one of these, it's a small board with GPS, GPS antenna, transmitter, Arduino, and two meter

You don't need RFI interference in GPS L1 band to disable GPS. Ublox MAX-8Q and all other MAX series modules do not have *any* antenna input preselector filtering - just an impedance match. Their

Hi Zack, Digital cameras are a huge source of EMI to desense GPS receivers. I always try to keep about 6 to 10 feet of isolation between GPS trackers and camera payloads. Aluminum shielding on the

Troubleshooting EMI can be fun... try doing this while at an FCC lab where the clock is ticking $$$ and you are calculating beat frequencies on almost unrelated things in a system to get a clue

Most of my testing that I did was with the cameras powered down. That's what is throwing me on this one - sensor seems to cause problems so I yank that, then it seems like the cameras are doing it,

I second Micheal's advice. I once had an EMI issue with a GoPro camera not allowing a GPS lock. My solution involved the cover from an Altoids tin. Once I had enough metal between the GPS unit the

Looks like you have an EMI issue, try wrapping the cameras with aluminum foil with just a small hole for the lens as small as you can get it without interfering with the view. Most likely your cameras

I'm looking for some ideas on troubleshooting some lock problems on a new board/capsule/camera design. The board has worked well during testing up until I started integration testing with the actual

Hi Mike Leigh (VE5LEE) and I (VE5BNC) had hoped to attend but, in a fit of wander lust, ended up booking a trip around Europe in June. GPSL is a ton of fun but Amsterdam, Prague, Vienna, Venice and

GPSL 2019 registration is now open and available. Please go to “superlaunch.org” for details on hotels, registration fees, and group dinners. Hope to see you all in Pella, IA on June 13, 14

https://www.energy.gov/oe/articles/april-2019-global-positioning-system-gps-week-number-rollover

Hi, Three years ago I was googling about high altitude balloons and I ended up with pico (floater) balloon projects. I was really impressed with some amateur radio operators efforts to circumnavigate

One thing i think works well, if you are part of a ham club that has a working repeater. Is to put your balloon repeater output frequency the same as your clubs repeater output frequency. That way

Also since you are running ATV, if you are flying a GPS unit, try to separate it as far as possible from the ATV system, I have had both the transmitters and even just the video

Mike, As I and others have stated forget about the repeater co-oridinators. You say up state NY. how about 600 miles away? or at least 3 to 4 hundred because that is what your

I would go with the 500 mW setting since it will likely have a high duty cycle and could overheat, even at 500 mW it could still overheat so try to mount the module on a good heatsink. Since you are

Well, I pulled the spreadsheet kept by the Upstate New York Repeater coordinators, and found a few frequencies that seem clear - 144.580 input, 447.025 output. I'm

A couple of things come to mind. The most important choice is the input freq as, not long after you launch, you'll be receiving any/all transmissions within hundreds of miles with no easy way to

I agree with Bill on that Pairing. FORGET repeater co-coordinators. We used them on the very first repeater flight ever.Way back in like 1989 or so. And They just

I typically use 446.025 and 144.340. Both are simplex. For a simplex repeater i use 144.340. -Bill WB8ELK