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Messages - JCurtis

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1
Technical Support / Re: Dead Rosetta - SD card slot has come adrift - Updated
« on: April 15, 2024, 03:26:54 pm »
Good luck, Peter!

The Pi is (at least) a 6-layer PCB, so you may need to pre-heat it a little to make life easier.  You will need a good flux when removing the cardholder and gentle lifting until it becomes free.  Clean the pads to get them as smooth as possible. Flux and solder wick are all you need.

Any lead-free solder paste should be OK for the replacement.  Personally, I use a SAC305 paste for manual assembly work, specifically SK P2-5 SAC306 88.5 20-30 T4 from SolderKing, made in the UK :-).

Out of interest, do they still use Molex 1040310811 cardholders?


2
Technical Support / Re: Dead Rosetta - SD card slot has come adrift
« on: March 31, 2024, 09:04:48 am »
There is loads of stock of the 3B+ in the uk, Rapid electronics have 200+.
Definitely the easiest solution.

I thought they had ceased production of the 3B with the + version the direct replacement.

3
Technical Support / Re: Dead Rosetta - SD card slot has come adrift
« on: March 30, 2024, 06:23:13 pm »
The power up sequence will be because cranking the engine will cause a low voltage. This may cause the Charge2 to switch off, so reboot the Pi.

That looks recoverable, possibly. If you can’t get a replacement Pi easily happy to have a look at it.

4
Technical Support / Re: adsb (out) not showing on Vector
« on: March 22, 2024, 05:11:30 pm »
I suspect you are transmitting ES just fine, regardless of what Vector is logging.
ADSBexchange will display MLAT or ADSB depending on what the feeders send.  I feed them ADSB and participate in MLAT too, same for FR24. 

If you flew nearer to Cambridge, and I knew when to keep and eye out, I could check my receiver in real-time to see precisely what is being transmitted.

5
Technical Support / Re: adsb (out) not showing on Vector
« on: March 21, 2024, 05:58:03 pm »
I picked an aircraft at random (a PA28) that was live and showing MLAT. Then went back to look at previous flights for the same aircraft and they showed as MLAT too. Just to see what ADSBExchage recorded for historical flights.

So isn’t Mode-S shown as MLAT and with added ES becomes ADSB. If so it looks like things are working on the aircraft in question.

6
Technical Support / Re: adsb (out) not showing on Vector
« on: March 21, 2024, 04:58:26 pm »
Just to keep Peter on his toes, I'll also throw this into the mix...

I picked a different aircraft on ADSBExchange that was showing as MLAT (a PA28).  I went back to find another flight, and it shows as MALT in the history.  So I think the transponder is doing its job correctly....

7
Technical Support / Re: adsb (out) not showing on Vector
« on: March 21, 2024, 04:43:53 pm »
However, for MLAT to work, the transponder and antenna must be operational, at least outputting Mode-S, which would be the same carrier as if it were also doing Extended Squitter from the GPS reference.  So perhaps the GPS -> Transponder link isn't running, but surly the Transponder would indicate if the data is there or not?

Defiantly weird.

8
Technical Support / Re: adsb (out) not showing on Vector
« on: March 21, 2024, 12:02:17 pm »
One for Peter really....

FlightRadar24 shows several flights for HEX 405F9B, including the 13 March. It is presumed to be ADSB, but FR24 doesn't say.

ADSBExchange shows the flights too, and reporting as ADSB data, this is from the 13 March ->  https://globe.adsbexchange.com/?icao=405f9b&lat=51.738&lon=-1.261&zoom=9.5&showTrace=2024-03-13&timestamp=1710334942

So it looks like the larger networks are picking up ADSB from an aircraft broadcasting HEX 405F9B. 

Do they look like the correct flights?

9
Technical Support / Re: adsb (out) not showing on Vector
« on: February 20, 2024, 07:53:55 pm »
ADSBexchange reports the flight on the 15th as being derived from ADS-B.

https://globe.adsbexchange.com/?icao=405f9b&lat=51.387&lon=-1.032&zoom=7.9&showTrace=2024-02-15&timestamp=1708012250

10
Technical Support / Re: PAW audio to Trig radio
« on: January 28, 2024, 09:20:50 pm »
Have you turned the Aux audio input max volume level up on the Trig?

11
Technical Support / Re: Power socket on Rosetta
« on: November 20, 2023, 11:59:51 am »
The USB sockets on the Pi's can be changed, but you need a hot air re-work station.  I've replaced quite a few when Pi's were in short supply.

Sometimes, the solder joints break, so it only needs a slight touch-up with a fine-tipped iron; other times, the sockets do need replacing.

12
Technical Support / Re: GPS No Fix - 22 satellites in view - 0 used - left on for 1:40hr
« on: August 22, 2023, 08:05:22 pm »
A good GNSS module should get a fix in a few minutes from a cold start.  With the modules I've been designing into gear of late, something is wrong if I don't get a fix within 90 seconds of a cold start.  I don't have a backup battery on the modules.

The USB dongle GNSS often seen with the PAW devices, has a tiny cell in them, which may be rechargeable or may not be.  Either way, they don't last more than a couple of years before giving up.

Just swap it out.

13
Technical Support / Re: GPS No Fix - 22 satellites in view - 0 used - left on for 1:40hr
« on: August 22, 2023, 12:39:39 pm »
If it’s modern double glazing with heat reflection, it may block the GPS signals. The signals are really quite weak, I’m always amazed it works at all.

14
Technical Support / Re: Garmin GPS AT575 with Pilotaware
« on: August 09, 2023, 09:49:19 pm »
Plugging in an external antenna usually disconnects the internal. It's mechanically done within the RF plug itself.
I'd give it a try and see if it works. just cover the patch antenna and see if the AT575 gets enough juice, it might work.

You could use a bias tee, but you may also need a DC block before it to remove the original 3v from the module itself.  It may not appreciate the reverse feed of 5v.

15
Technical Support / Re: Garmin GPS AT575 with Pilotaware
« on: July 27, 2023, 08:06:41 am »
Search for GNSS dongle with external antenna connector.

This is one, power for the active antenna is only 3v, below the 4.5v min needed.

https://gnss.store/neo-m9n-gnss-modules/119-elt0103.html

You may need to use a bias-T to supply the power if the dongles can’t supply the power needs of the antenna. Those can take 60ma or more I think. It will be checking all the data sheets.

Suspect you’ll need to source from outside the UK, but beware that almost every GNSS dongle from China that says it has a U-Blox receiver it will be a clone that just uses the same commands. It’s pot luck basically how well it will work. They sell whole dongles for less than I can buy 10,000 of the raw U-blox chips for.

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