The difference after adding a HDTV amplifier to my existing handy spider. The amplifier requires power from a USB source or 6V via coax:
2 SAW filters arrived today. Any tips on how to solder them onto a breadboard/Vero board?I'm sure aliexpress has some 1090 MHz SAW filters you can buy.
May be these diagrams will help. Terminal B is input, E is output. Terminals A, C, D & F are ground.2 SAW filters arrived today. Any tips on how to solder them onto a breadboard/Vero board?
I did come across some of your discussions from 2015. There seems to be some literature that says that the input/output must be orthogonal to each other. Also, the thickness of the board show be around 0.2mm (impossible to find).May be these diagrams will help. Terminal B is input, E is output. Terminals A, C, D & F are ground.
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Several things you need before starting this challenge: at least 5 hands to hold all the pieces 2 of the hands should be quite small and belong to a surgeon the eyes of an eagle to see the contact patches the patience of a saint I have none of these so don’t critisize my soldering...discussions.flightaware.com
Yeah, I know. The tiniest soldering I've had done is on the 555. This is way smaller. But let's see what happens. Need to find a board with 0.7mm strip width and that is a challenge as well.Not sure how you would solder that onto a prototype board while maintaining a proper signal.
Managing high frequency signals on PCBs isn't trivial and to be honest i don't really have a clue about it.
Due to the small pitch you might want to put the chip on its back and solder tiny wires to the terminals.
Google dead-bug style SMD.
So i'll just wish you good luck, too bad your import rules didn't allow you to get the proper filtered LNA :/
So the last 3 hours in making a premature attempt to see if center conduct can be connected directly. Whereas the first connection to the B terminal was successful, it went downhill from there with other terminals' solder bleeding to the adjacent terminal. I will see if someone can just solder copper strands or about 28SWG wire tightly to the terminals. I can carry out rest of the coax surgery.Basically you could fix a length of coax optimally with connectors to a piece of plastic or wood.
Then you just cut the coax open with a disposable blade maybe 2 cm. Just remove the top half so the center conductor is exposed.
Cut the conductor so you have a 1 cm gap.
Then you clue the filter upside down to the coax insulator.
With single strands from braided copper wire you can now connect the terminals appropriately.
Then you use a bit of copper sheet to close the gap in the shield if you want. Or some mesh.
You should not power in amplifier without connecting receiver (DVB-T)This just arrived. So did the 20db inline amplifier. Specs say do not power in without load being connected.
Does that mean I have to somehow short my spider antenna somewhere?
Let's see what I can do this weekend.
So what happens if the DVB-T gets disconnected? Is the duration of the disconnection a factor?You should not power in amplifier without connecting receiver (DVB-T)
(For an RF amplifier the "Source" is Antenna, and the "Load" is Receiver DVB-T).
Reinstalled rtlsdr. Reboot. Stopped dump1090-fa. Test found USB dongle.Some quick questions:
i) When the DVB-T is connected to the power inserter, the entire RPi is likely to crash/hang. Even a ping to the Pi port stops immediately. The CPU of the Pi0W anyway runs hot. A pause and restart *sometimes* cures this. The htop log is below:
ii) Sometimes dump1090-fa auto exits and stops running.
iii) Even when running, PiAware sometimes displays "
Problem fetching data from dump1090.
AJAX call failed (timeout: timeout). Maybe dump1090 is no longer running?
The displayed map data will be out of date. "
It could be that dump1090 is stressing the system. Not sure.