Stefan D

2.4K posts

Stefan D banner
Stefan D

Stefan D

@DC7DS

Husband and father of two - IT-Infra & OpSec specialist, interested in IT-Security, (I)IoT, SDR, wireless networks and amateur radio. Views are my own.

Passau, Bayern Katılım Aralık 2014
331 Takip Edilen607 Takipçiler
Stefan D
Stefan D@DC7DS·
@AboveWeston Gpsdo splitting for 4 pcs. of PDSDR using a minicircuits power splitter
Stefan D tweet media
English
1
0
3
95
PLIW
PLIW@AboveWeston·
3x GPS PPS LED’s in sync. Now this begs the question about GPSDO and splitting it. I also have 3x Airspy R2’s on the server so it would be 6 devices that would use it at present. Tempting
PLIW tweet media
English
3
0
21
1.2K
Stefan D retweetledi
Scott Powell
Scott Powell@ripple_biz·
MeshCore firmware v1.14.0 is now out. A lot of repeater features/changes: * multibyte path hash support * new CLI command: “get/set loop.detect …” * new CLI command: “get/set path.hash.mode …” * new CLI command: “get bootloader.ver” * new CLI command: “discover.neighbors”
English
0
2
6
257
Stefan D
Stefan D@DC7DS·
@glenbeer Running our datacenter BGP uplink via a pair of Mikrotik routers since 2015, rock solid
English
0
0
2
733
Glen Beer
Glen Beer@glenbeer·
It was a rare moment seeing a Mikrotik installed by a customer but I'm seeing more & more customers moving to mikrotik, even utilizing for critical Internet infrastructure.
Glen Beer tweet media
English
10
4
80
8.4K
Stefan D retweetledi
Alain K1FM
Alain K1FM@k1fm·
Web-based FT8, CW and SSB for the IC-7300 It's quick, it's cool, it's on any laptop or phone I put my hands on. I honestly have stopped using other software. mk1 or mk2... should work with all other modern Icom rigs as well. Thanks Claude! github.com/adecarolis/wfw…
English
7
30
180
10K
Oleg Kutkov 🇺🇦
Oleg Kutkov 🇺🇦@olegkutkov·
Got some cool stuff from @LeoBodnar Not tested yet. I'll use one of these GPSDOs in the upcoming project.
Oleg Kutkov 🇺🇦 tweet media
English
4
4
106
5.2K
Stefan D
Stefan D@DC7DS·
@AboveWeston We just replaced the oscillator with gpsdo input. PDSDR needs Fref=155.520MHz, so we inject this. Seems to work stable. Just keep on mind: if the Fref is not there, the PDSDR freezes completely - therefore we added usb power switches to be able to powercycle the PDSDRs
English
0
0
0
66
PLIW
PLIW@AboveWeston·
@DC7DS @DC7DS how does the GPSDO work doing it this way
English
1
0
0
77
Stefan D
Stefan D@DC7DS·
Ongoing rebuild of #DL0PF skimmer / websdr - 4 pcs. of #PDSDR, Leo Bodnar GPSDO, tasmota usb power switches #hamradio
Stefan D tweet mediaStefan D tweet mediaStefan D tweet mediaStefan D tweet media
English
5
1
17
903
Stefan D
Stefan D@DC7DS·
@g7soz 4 PCs. USB-3 1Gbps NICs and a usb-c hub
Stefan D tweet media
English
0
0
1
21
Stefan D
Stefan D@DC7DS·
@g7soz Proxmox 9 hypervisor and multiple OpenWebRX+ instances in Ubuntu 24.04 VMs
Stefan D tweet media
Română
1
0
2
98
Stefan D retweetledi
Peter Steinberger 🦞
Peter Steinberger 🦞@steipete·
Folks, I'm looking for @openclaw maintainers. If you love open source, have experience with running larger projects, are security minded and want to help, drop me an email. #maintainers-1" target="_blank" rel="nofollow noopener">github.com/openclaw/openc…
English
352
481
6.3K
438.8K
Robin Davies
Robin Davies@rdavies6·
FT8, FT4…and now FT2…
DX World.net@DX_World

For those interested, maybe you missed this comment left on a previous posting regarding FT2. Beta testers wanted: ----------------- FT2 is not a theoretical concept. It is fully working software, tested and operational. On February 16, 2026, we successfully completed dozens of real contacts in FT2 mode, with transmission cycles of 3.8 seconds — four times faster than FT8 and twice as fast as FT4. QSOs were verified on two bands (40 meters and 80 meters) with stations in Campania, Capri, Sardinia, and Turin. Signals were successfully decoded down to -12 dB signal-to-noise ratio. FT2 uses the same codec as FT8 and FT4: 77-bit payload, LDPC (174,91) encoding, 8-GFSK modulation. The only difference is the time compression: shorter symbols, cycle reduced to 3.8 seconds. The result is a complete QSO in 7-11 seconds, compared to the full minute required in FT8. This mode was conceived and developed by IU8LMC, with the support of the ARI Caserta Team. Artificial intelligence was used as a development tool to assist with modifications to the WSJT-X source code. The Time vs Bandwidth vs Sensitivity chart shows the engineering trade-off behind FT2: at 3.8 seconds with 150 Hz bandwidth, sensitivity is approximately -12/-13 dB. Less sensitive than FT8, but more than sufficient for contests, DXpeditions, and pile-ups where signals are strong. FT2 does not replace FT8 or FT4. It is a specialized mode for when pure speed is what matters. Anyone interested in trying the beta software or wanting more information is welcome to join our dedicated WhatsApp group: chat.whatsapp.com/HKV5pdpqqNC3Vf… We are looking for beta testers willing to experiment with FT2 on-air and provide feedback for the final development phases. 73 de IU8LMC — ARI Caserta Sud Italy

English
3
0
5
477
Stefan D retweetledi
DX World.net
DX World.net@DX_World·
For those interested, maybe you missed this comment left on a previous posting regarding FT2. Beta testers wanted: ----------------- FT2 is not a theoretical concept. It is fully working software, tested and operational. On February 16, 2026, we successfully completed dozens of real contacts in FT2 mode, with transmission cycles of 3.8 seconds — four times faster than FT8 and twice as fast as FT4. QSOs were verified on two bands (40 meters and 80 meters) with stations in Campania, Capri, Sardinia, and Turin. Signals were successfully decoded down to -12 dB signal-to-noise ratio. FT2 uses the same codec as FT8 and FT4: 77-bit payload, LDPC (174,91) encoding, 8-GFSK modulation. The only difference is the time compression: shorter symbols, cycle reduced to 3.8 seconds. The result is a complete QSO in 7-11 seconds, compared to the full minute required in FT8. This mode was conceived and developed by IU8LMC, with the support of the ARI Caserta Team. Artificial intelligence was used as a development tool to assist with modifications to the WSJT-X source code. The Time vs Bandwidth vs Sensitivity chart shows the engineering trade-off behind FT2: at 3.8 seconds with 150 Hz bandwidth, sensitivity is approximately -12/-13 dB. Less sensitive than FT8, but more than sufficient for contests, DXpeditions, and pile-ups where signals are strong. FT2 does not replace FT8 or FT4. It is a specialized mode for when pure speed is what matters. Anyone interested in trying the beta software or wanting more information is welcome to join our dedicated WhatsApp group: chat.whatsapp.com/HKV5pdpqqNC3Vf… We are looking for beta testers willing to experiment with FT2 on-air and provide feedback for the final development phases. 73 de IU8LMC — ARI Caserta Sud Italy
DX World.net tweet media
English
2
20
70
8.5K
Stefan D
Stefan D@DC7DS·
All-in-one solution, based on a cheapo sdr switchbox. Now it contains a sv1afn low-noise preamp, a turn island shelf filter and a mini circuits power splitter
English
0
0
2
95
Stefan D retweetledi
EchoSDR
EchoSDR@SDRecho·
Echo is ready. I’m crowdfunding the $99 Apple Developer license. Support for KiwiSDR, OpenWebRX, WebSDR & FM-DX is live. The free waitlist is now CLOSED. Missed it? You can still get guaranteed Priority Access + 3 Months of Pro by backing the launch fund here: ko-fi.com/EchoSDR #SDR #HamRadio #Shortwave
EchoSDR tweet media
EchoSDR tweet mediaEchoSDR tweet media
English
0
1
6
841