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Pieter Ibelings

@ibelings • 18,462 subscribers

Physicist, N4IP, Antennas, Space Systems, SDR, RF, RADAR , Phased Arrays, Satellites, Solar Power, PCB Design, AI - Build, baby, build! 🇺🇸🇪🇸

Shorts

New display for my ADS-B tracker: azimuth/elevation instead of a map. I wanted one display I could reuse across the satellite tracker, spherical waterfall, GNSS monitor, and passive radar apps. With a scanning receive array, passive radar returns come in as az/el, so this gives me a way to match returns to aircraft. Multi-site passive obs solve straight to lat/lon, which is what the map is for. Pluto SDR on an indoor antenna, so signals are weak, but that's real traffic. Runs on iPad too, with the Pluto over USB. Nice feature to be able to apply all my waterfall colormaps to flight level, speed, RSSI or range.

New display for my ADS-B tracker: azimuth/elevation instead of a map. I wanted one display I could reuse across the satellite tracker, spherical waterfall, GNSS monitor, and passive radar apps. With a scanning receive array, passive radar returns come in as az/el, so this gives me a way to match returns to aircraft. Multi-site passive obs solve straight to lat/lon, which is what the map is for. Pluto SDR on an indoor antenna, so signals are weak, but that's real traffic. Runs on iPad too, with the Pluto over USB. Nice feature to be able to apply all my waterfall colormaps to flight level, speed, RSSI or range.

16,412 görüntüleme

And this is how you open the X/Ku band version of the Black Widow "umbrella" dish from MTI.

And this is how you open the X/Ku band version of the Black Widow "umbrella" dish from MTI.

20,137 görüntüleme

Testing the E-field dipole for 2-60 MHz. The signals are really strong with sharp nulls. The new board is powered through the coax. #hamradio #FT8 #Antennas

Testing the E-field dipole for 2-60 MHz. The signals are really strong with sharp nulls. The new board is powered through the coax. #hamradio #FT8 #Antennas

17,812 görüntüleme

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Remote HF, no PC at the radio: アイコム株式会社 Icom Inc IC-7300MK2 → Ethernet → pocket travel router → Tailscale → Starlink Mini → SpectraRemote on an M4 Mac mini. Three UDP ports, hand-rolled keepalives, your own sequence numbers. None of it documented. You find out by sniffing packets and diffing against a client that already works. Every 90 seconds the radio asks if you're still there. Miss one reply and it keeps streaming a gorgeous waterfall while ignoring every command you send. Not broken. Offended. Recovery procedure: power cycle. Trivial, unless the radio is in Zimbabwe and you are not. A 2026 mesh VPN carrying a protocol that still thinks it's on a LAN in 1996. And it works! 😂🤣

Remote HF, no PC at the radio: アイコム株式会社 Icom Inc IC-7300MK2 → Ethernet → pocket travel router → Tailscale → Starlink Mini → SpectraRemote on an M4 Mac mini. Three UDP ports, hand-rolled keepalives, your own sequence numbers. None of it documented. You find out by sniffing packets and diffing against a client that already works. Every 90 seconds the radio asks if you're still there. Miss one reply and it keeps streaming a gorgeous waterfall while ignoring every command you send. Not broken. Offended. Recovery procedure: power cycle. Trivial, unless the radio is in Zimbabwe and you are not. A 2026 mesh VPN carrying a protocol that still thinks it's on a LAN in 1996. And it works! 😂🤣

Pieter Ibelings

204,543 görüntüleme • 2 ay önce

The 2x2 phased array is tracking satellites! I am running some tests on LEO satellites before I go full electronic beam-steering. #AMSAT #N4IP #SO50 #RS44 @RFSPACE

The 2x2 phased array is tracking satellites! I am running some tests on LEO satellites before I go full electronic beam-steering. #AMSAT #N4IP #SO50 #RS44 @RFSPACE

Pieter Ibelings

150,769 görüntüleme • 2 yıl önce

The wideband spiral antenna came out looking good. Time to start measuring and optimizing. #cubesat #rf #antennas

The wideband spiral antenna came out looking good. Time to start measuring and optimizing. #cubesat #rf #antennas

Pieter Ibelings

40,452 görüntüleme • 3 yıl önce

The satcom amplifier is doing 250W at 432 MHz with modified LPF. Next step to see if 2x2 phased array can handle the power. #EME

The satcom amplifier is doing 250W at 432 MHz with modified LPF. Next step to see if 2x2 phased array can handle the power. #EME

Pieter Ibelings

14,376 görüntüleme • 2 yıl önce

Daha fazla içerik yok.