I saw this. Your build looks pretty good.
I have a rover and a copter that have 100mw telemetry the GPS works good on both. One is a holybro the other came with an APM FC. Neither has the Cube or Here GPS. I will do some testing with these 100mw versions to see if they work with my Here GPS or not.
As far a the topic link goes… I looked through it but there is no acceptable solution there. I already have wrapped the telemetry in foil tape grounded to the antenna with some success but not much. I would never try to isolate the battery powering the telemetry because that’s not how these things were designed to plug in to the FC. Also I don’t have any rf testing equipment or the technical knowledge to not be dangerous diagnosing radio diodes.
My experience is user based and using RTK radios goes back a few decades. I am using 35 watt radios that are 15 years old when they were new GPS & especially GNSS receivers had to be several meters from the tx radio to get a fix. Today with the same old radio I set my 35 watt radio less than 2 feet away from my base on top of my truck. New survey grade GPS receivers are better protected now. I think that is why I am not getting good results or answers with the cheaper ubox M8x stuff.
My experience with other FC’s goes back 10 years and I just looked at one of my first setups:
DJI NAZA v2 with GPS, USB & power module
8 channel Spectrum radio with telemetry RX and a satellite RX
The completed great flying project had:
14 - 3 & 4 wire connections to the FC,
10 - 3 wire connections to the radio,
2 -2 wire connections to telemetry,
12 power wires going to ESC’s &
18 wires ESC to motors.
That is 56 connections & over 100 (mostly plastic insulated) wires that I had to plug in DIY.
Today’s build a quad: motor ESC combos, Cube FC, Here+ GPS, spectrum satellite rx and telemetry. 8 connections to the FC and 8 connections to the power module,
34 wires total including (3-6 wire connectors & 4-2 wire connectors, 8 soldered power wires).
All silicone all built with 10 years of experience.
Now for months looking a my simple quad build?
I would really like a hardware solution at this point. Hence my rant!
Also: I can see the same GNSS loss at the base station. No quad even powered on.