ph4as

[WaveDrom @wavedrom]

3D printed from brass / copper. Good performance https://t.co/bYTeIOK6R0
Design is parametrizable in 500-2000MHz range.
Did 2 and 3 stage versions

[ph4as @_ph4as_]

@halvarflake @travisgoodspeed Foundation of my career

[Aang254 (🦋 aang23.satdump.org) @aang254]

Some video from space courtesy of @TUBspace's TUBIN satellite. Received on X-Band by @redplanet00.

You can see the satellite tracking a point on Earth as it is passing overhead, as well as some wobble in attitude when it first rotates.

[Mike M. Volokhov @mishkathebear]

In the case if you ever wanted to see what these cheapo 8GHz attenuators have inside.

[Monogourd @Monogourd]

距离上次坏掉又过去大半年了，最近花了两个星期的时间查到了故障点。在Phase tracking电路中有一个全加器，它有4个输入来自拨码开关，有些开关轻微漏电导致全加器输出处于亚稳态(视频为全加器Pin1输出)。给这四个拨码开关加了上拉电阻解决问题。使用这种极弱的TTL内部上拉显然是42年前的疏忽。

[桑様 @kuwahara82]

ワイヤボンディング始めるぞコラァ

[Tom Verbeure @tom_verbeure]

Increasing Frequency Counter Precision with Linear Regression https://t.co/aY6kFRbkaJ

[Fred Jansen @redplanet00]

Yesterday I switched the X-band kit over to LHCP. First satellite I tracked was FY3D .. and .. it looked as miserable as FY3F on RHCP; the exact same signal behaviour over elevation. So, this AM my first pretty succesfull FY3F pass. Mea culpa for not believing in it. Small crop.

[Antmicro @antmicro]

Announcing gerber2ems - an #opensource script integrating @kicad_pcb with #OpenEMS, suitable for high frequency HW design, with 3D visualization in @Blender. Control your signal integrity analysis with our customized solutions: https://t.co/Wvwnju54LI

[Achim Vollhardt @dh2va]

https://t.co/xlurC3rODB
A must-see for all DSN nerds: the crossover we all waited for. @eevblog visiting @nascom1 !

[Steve @G8GKA]

I’ve been metal bashing and melting solder today.
Definitely worth taking time to make a jig to help with the alignment and assembly of the new 10GHz W2IMU feed horn.
#GHz_Bands

[ph4as @_ph4as_]

@petermeteor @redplanet00 @aang254 Thanks for the info!

[Mehdi @MehdiHacks]

Now it’s time to compare my RF signal generators:
MoRFeus, ERASynth Micro, tinySA Ultra’s signal gen mode, GenComm GC747A, and SignalHound VSG60A. First, I measure THD (total harmonic distortion) at 1GHZ on 0dBm and -20dBm output.
I use SignalHound BB60D for measurements.

1/2

[ph4as @_ph4as_]

@fakehistoryhunt @PieceJake ?

[Aang254 (🦋 aang23.satdump.org) @aang254]

First imagery from FengYun-3G :-)
(Received by @Dario24105)

@CNSpaceflight here is the first public FengYun-3G image decoded just now, if you're interested.

[Sam M @samerps]

starting a new series of electromagnetic simulations and renders using openEMS in Blender! This animation shows how a wave propagates in a coax with open termination #b3d #Blender3d @kicad_pcb @FreeCADNews @DanielBogdanoff #Simulation #electronics @hackaday @Chris_Gammell

[GiamMa-based researchers SDR R&D IoT @giammaiot2]

LibreCAL

https://t.co/3RW5pkd1nY

4-port, 9kHz to 6GHz eCal module for VNAs.

some empty links..

#VNA #VectorNetworkAnalyzer
#LibreVNA

[ph4as @_ph4as_]

@M1SJE @g4bao https://t.co/cDiRVKDMZF these work pretty well

[Tomasz SP5LOT @Tomek_SP5LOT]

CAS-5A. Photo 07. Thanks to the decoder @knglaser, but also the hard work of @scott23192 and @HRPTEgor I have such a picture! I sent to satellite twice requesting *07# . I saved the kss file and processed the decoder. SUCCESS !
@DL4PD @SatNOGS @ea4gpz