eb3frn

The wirebonding learning continues, this is a uW amplifier mounted from scratch.🙈🙈 #rfporn #ghz_bands #amateurradio

@ibelings Cool! 😍

Testing per-sample IQ Doppler correction in SpectraFlux. Satellite tracking software sends frequency updates via rigctld — instead of retuning the SDR (which causes PLL transients and audio glitches), the correction is applied as a phase-continuous NCO rotation on every IQ sample. SDR parks at a clean center frequency, Doppler offset handled entirely in the digital domain. Zero retune latency, no phase discontinuities. Here's a Python script driving a ±50 kHz sinusoidal S-curve through rigctld while the spectrum tracks it smoothly. SpectraFluxのIQドップラー補正をテスト中。 衛星追尾ソフトからrigctldで周波数更新を受信し、SDRの再チューニングではなく、IQサンプルごとにNCO位相回転で補正を適用。PLLの過渡応答やオーディオの途切れがゼロ。Pythonスクリプトで±50kHzの正弦波ドップラーカーブをシミュレーションしています。

@uhf_satcom I'm sorry Paul...

RIP Gustopher, he was a very good boy.

@BoscoMac Thanks, only HP/Agilent/Keysight gear in the lab! 🤓🤓Yep adjustable height, it are OK to test other equipment but I dont like for small DUTs with a lot of cables, is better a large table

@eb3frn I'll take pictures of you. Your tables should also be height adjustable? By the way, I love your lab. So many beautiful HP devices. 😎

I set up the first devices in the new laboratory. The electronics laboratory is now fully air-conditioned. Stable temperatures for calibration. Soon the work tables will be set up. #hp #agilent #keysight #tektronix #rohdeubdschwarz

@BoscoMac Great, send some a picture pelase when you finish your setuo,always is nice get inspiration for others. I’musing small tables with wheels to move in front of every rack, but this tables are too small for some DUT’s. But for the new lab I’m thinging in more bigger fixed tables.

@eb3frn I build the tables from aluminum profiles. With wheels to move. Also with storage for devices.

@ibelings Tengo un macbook M2, pero si puedo probar tu soft quizas me ayuda a comprarme un mini con un M4 😇😇

@eb3frn Tienes un Mac con chip M? Me gustaría que lo probaras.

SpectraFlux can now see and decode airplanes. PlutoSDR at 1090 MHz, ADS-B decoder written from scratch in Swift. 70 aircraft from a tiny antenna on my desk. It helps to be on the corridor to KATL.

@ibelings I prefer the most modern ESA Analyzers, they are the last of the good ages of HP/Agilent are strong and pure heavy iron 🤓

@sdf_pubnix In the 3 last month 4 rifa caps burned here from HP laboratory gear...

Let 2026 be the year of the RiFA!

@ibelings Looks great! when will be released??? :P

Got pySpectraVue running way faster. Now it processes the full sample buffer and batches waterfall lines in a single repaint. Huge difference. Python/PyQt6/PyTorch/NumPy. Torch handles GPU FFTs on Apple MPS and CUDA. Talks to USRP B210 and RFSPACE NetSDR.

@F5OEOEvariste @enjoy_digital Please keep us informed, tnx!

Start of an adventure : thanks to @enjoy_digital !

@amsatdl Ok, tnx!

@eb3frn 1 Hz size of bin

VOYAGER-1 live on the YouTube stream from Bochum.

@ibelings I’m anxious to see the next one ;)

These are still some of the best performing SDRs. What's next?

@mov_axbx Great machines! interested to join

Reply or DM if you want to be added to a vintage computing GC If you want to repost this, that would help us have an active GC that isn’t too quiet :)

@F5AYE @xjamesmorris Not planned , you see it interesting?

@eb3frn @xjamesmorris Hi Iban, Do you plan to publish a publication on this engraving method? 73Jean Paul F5AYE

Black magic to create new 47GHz devices 😇😇 #GHz_bands #hamradio #hamr

@g8kmh @xjamesmorris In the video was a FR4 for testing, but also using very thin Rogers for microwaves and millimeter bands

@eb3frn @xjamesmorris Iban, what PCB material are you now using?

@BoscoMac I understand you, I’ve the same “problem” with the E3631A power supply 😅

If someone asks you if you have enough 3458A, you say no! 😬 #3458a #keysight #agilent #hp

@ibelings Tengo los dos. Del NetSDR, el SN #0001 😜😜

@eb3frn tienes un NetSDR o B210? Son los unicos que funcionan y no tiene demod.

🚀 Major progress on PySpectraVue, a Python-based spectrum analyzer optimized for precision! Image shows testing with 512k FFT and various colormap files. Features pixel-perfect rendering (no smearing in time or frequency), exact frequency displays, high-res zooming, and hardware-accelerated FFT via PyTorch (MPS/CUDA). Inspired by the big guys, PySpectraVue builds on 25+ years of SpectraVue SDR legacy. #SDR #SignalProcessing #Python

@ibelings Como va el PySpectraVue ??? :)

@eb3frn esta semana le trato de agregar el B210 y NetSDR