Joined June 2015
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806 Photos and videos
Now inactive LF beacon (NDB) 'FA' that was transmitting on 325 kHz, from Figari - south Corsica (JN41po locator).
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Alps DX 🇫🇷 retweeted
🇫🇷French Air Force “Circus” network 8992kHz.
I was only able to record these few moments. Communications were very rapid, and for now, all is quiet.
Received in 🇮🇹Milan 1900z June 12
Translation would be appreciated. Thanks
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Alps DX 🇫🇷 retweeted
AirPulse Desktop: Turn an RTL-SDR into an Amateur Radio Repeater Activity Reporting Station | RTL-SDR.COM
rtl-sdr.com/airpulse-desktop…
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Jun 6
La señal que se ve en el vídeo es el "eco" de un CODAR, un radar terrestre que monitoriza el mar desde la costa. Emite ondas de radio en Onda Corta que “rebotan” en las olas para mapear corrientes marinas y oleaje en tiempo real con distancias de hasta 200 km. Equipo SDR Airspy HF YouLoop 🌊 📡 #SIGINT 👇
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Viterbi in action. Even with that much noise the Viterbi can find info in noise. Love science and dynamic programming
I am toying with OFDM using the Pluto clone and I can tell you its lot of fun. Managed to get the OFDM signal transmited and received. Video coming soon.
Supports BPSK, QPSK, 16 QAM and 64 QAM with Veterbi decoder.
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May 30
Monitoring VHF on my trusty GP antenna, in the cool peace and quiet of the mountains, not far from home.
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Panasonic RF-2200, Several sources refer to it reverently as “The Holy Grail” of AM analog portables, while others, more conservatively, simply say it’s “the best AM portable radio ever made…a DX-er’s dream”. Strong claims to be sure. It also has an excellent FM tuner.
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144 MHz Halo Antenna
Construction and Analysis of a Low Cost Omni directional Horizontally Polarized Antenna for 144 MHz By: Dr. Carol F. Milazzo, KP4MD
Complete Details & More: qsl.net/kp4md/144_mhz_…
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Alps DX 🇫🇷 retweeted
May 28
🌍 Please to announce the new version of my worldwide VHF tropospheric propagation forecast tool is live at tropo.f5len.org/WW/
smoother map, ◀▶ navigation between forecast steps, and smart GeoTIFF preloading for near-instant browsing.
Feedback welcome! #hamr#VHF #tropo
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Alps DX 🇫🇷 retweeted
OPS 6582 (TRANSIT 5B-5)
62 year old US Navy navigation satellite that is still transmitting at 136.658 MHz.
Reception: 29 May 10:28Z
Frequency: 136.652 MHz & Doppler
Mode: Carrier
Antenna: 2m band 5/8 Ground Pane.
Tracking: n2yo.com/?s=965&live=1
#amsat #OPS6582 #Transit5B5
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May 22
Another one bites the dust : as of June 22, CHU Time Signal - operated by the NRC (Canada) - and transmitting on 3330, 7850, and 14 670 kHz will no longer be available.
The call letters CHU were first used for Canadian time transmission in 1938.
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Alps DX 🇫🇷 retweeted
The 5-element omnidirectional horizontally polarised (ODHP) (cloverleaf) antenna for 435 MHz, constructed as a replacement for a beacon antenna.
Completed build photos.
vk6ysf.com/435mhz_5_petal_cl…
#hamantenna #70cmantenna
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May 14
All documents were updated this week.
Download them : it's free !
dxguides.info/
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Alps DX 🇫🇷 retweeted
May 14
RTL-SDR Blog V4 End Of Line rtl-sdr.com/rtl-sdr-blog-v4-…
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