HB9TMC

You could check the other voltages:

http://kiwisdr.com/ks/troubleshooting.pdf

This is almost certainly RFI from an unstable oscillator, probably harmonic from a switching power supply.

Finally a use case for my 10 Gb/s internet access 😁

During a solar coronal mass ejection, the ejecta generates radio emissions as it plunges through the suns chromosphere and corona. These emissions can be received on earth. There are different types of radio emissions, shown in the spectrogram examples on this page:

https://en.wikipedia.org/wiki/Solar_radio_emission#/media/File:Solar_Radio_Bursts_Types_I,_II,_and_III.jpg

Early in the year, I observed a noise pattern in my kiwisdrs spectrogram that coincidentally happened at the same time as a solar flare with CME. I was sceptical, so I haven't thought further about this.

On June 9th 2021, I saw the same pattern again, at the same time of a CME associated to a C3.8 LDE flare, with officially confirmed type-II radio emission.

I was still sceptical if it was really what I was seeing on my kiwisdr.

Here is a spectrogram of the event. Note that I have set the spectrogram very sensitive (low dynamic range) for the purpose of showing background noise. So DSL and PLC noise from more than 50 meters away can be seen. Also I have some LC filters installed, to prevent receiver saturation from strong broadcast stations. WF-rate 1 Hz. Suspected radio emission is circled red:

Below 5 MHz no emission was recorded (on a separate kiwisdr with different filters). But the signal would be attenuated by the ionospheric D-layer anyway, so it can't reach earth surface.

Now, today there was a powerful X1.59 flare. And my kiwisdr shows again this pattern. This time also with a distinctive radio blackout, as expected from a X-class flare.

73

@f6bir
The default gateway could be missing or wrong defined.
Can you show the output of "ifconfig" and "route"?

@W9SPY
You could try using another power supply at the router (maybe the one from the old router). Just make sure it has the same voltage and polarity and an appropriate amperage rating.

Using a _non_ shielded ethernet cable may also help. (The BBG ethernet shield is connected to antenna ground. And some routers ethernet shields are connected to their PSUs minus pin)

I made good experience with the filament LEDs which recently popped up. They run on such high voltage that they often don't require a switching mode power supply, but only a capacitor dropper and a rectifier.

My neighbors blinking/dimming LED lights are leaving a beautiful background pattern in my LF spectrum


Happy holidays and thanks to everybody who was/is involved in kiwi related projects.

73
Stefan

My neighbors blinking/dimming LED lights are leaving a beautiful background pattern in my LF spectrum


Happy holidays and thanks to everybody who was/is involved in kiwi related projects.

73
Stefan

cat /dev/urandom >/dev/null
once per CPU thread