My German license qualifies for #HAREC, so I got now upgraded to the highest class in Japan.
www.tele.soumu.go.jp/musen/Search...

Thanks. Surprisingly low amount of HAM related groups here in Tokyo, but yes, they exist and I'm connected.
Also with receiving a license in Japan, one directly gets into an internet portal to an online community in Japanese.

"The 52 week ham radio challenge" deserves to be know much more widely. Fantastic list of things to do in #HAM :
www.hamchallenge.org

Comparing Power Measurement Methods for computers I got this Power-Z measurement device the other day.. what is it, and how does it fare against the other measure methods? My last comparison was in 2022.\nThe contenders I have some sources for measur...

What's best to measure your computers power consumption: a Smartplug? The sensor in the comupter itself? Some extra measure device?

I bought a Power-Z device: it's not cheap, but has a native Linux driver for measurements.
blog.fluxcoil.net/2026/03/comp...

Why is noone hearing it? Basics of sending radio waves. At the middle of last year, I got all the hardware together to do radio transmissions here from my room in the West of Tokyo. It just did not work, and took half a year to debug. This here is a small ...

After months, I got an issue with my radio transceiver setup debugged.
This article is a recap, my attempt to understand what I could have done better..
Might be an interesting read for people who are curious how much is involved to send radio signals.
#HAMradio
blog.fluxcoil.net/2026/03/debu...

Are you looking for an introduction into "Software Defined Radio", especially together with Linux?
I'm introducing the basic concepts, and software gprx and OpenWebRX+.

Might contain segways into #HAMradio . 😃

Slides: fluxcoil.net/files/presen...

Amateurfunk im All – Kontakt mit Fram2 Wir geben Einblicke in zwei intensive Wochen Planung, Koordination und Aufbau, den Betrieb einer (improvisierten) Bodenstation, sprechen ...

At #39c3 , HAMs presented about their radio contact with Fram2, a spaceX mission.
We will discuss this on Friday, January the 16th, in #Tokyo ( 7pm, room #202 at Jiyugaoka Juku Center ) at the local club - come over if you are in the area!

Recording in German: media.ccc.de/v/39c3-amate...

Emulating the Amiga 1000 Keyboard TL’DNR: My steps towards emulating an Amiga 1000 keyboard, using the GPIO (input/output) pins of a Raspberry Pi, and implementing parts of the keyboard protocol in Python.\nBackground Around 1997 I go...

My steps to emulate the #Amiga 1000 keyboard with the Raspberry Pi:
blog.fluxcoil.net/posts/2025/1...

Connecting a Morse Key to the computer Since spring of this year I’m learning to pick up morse code, so to hear sequences of dits and dahs/long and short sounds, and interpret the characters they represent.\nThat’s progressing.. but it’s j...

I finally found the time to connect my Morse key to the computer, worked out as simple as I hoped - the Morse key is simply shortening a circuit, which is the same as mouse button switches are doing.

So now I can also practise to give CW.

Details: blog.fluxcoil.net/post/2025/12...

#HAMradio

They have chips in everything these days!

Tokyo at night, near the emperors palace. In the far, high buildings with light shining out of their windows. At the bottom, the street and walkway, in warm and brown light.

Tokyo at night, near the emperors palace

We do an evening around #LoRa devices and #Meshtastic on Friday.

- What are Lora, how does Lora relate to WiFi
- What's Meshtastic, will bring in some devices
- I'll explain this BBS use case idea, how it works

Location: Nov 21st, 7pm, Meeting room 202 at Jiyugaoka juku Center, Tokyo

Another interesting thing is how fast the ether congests, I mean, it's not even "all devices within reach are in one broadcast zone" but worse as one device might not detect when another one is already sending.

I have not, thanks for the hint!

Two contestants back-to-back on a small circular platform. At the signal, they use their bottoms in an attempt to knock their opponent off the dias.

It is November, and that means "Butt Sumo" (尻つみ祭り) time again at the local shrine here in Ito, #Japan. Contestants stand back-to-back on a raised dais and, at the signal, attempt to bump their opponent off. The winners are sometimes surprising.

Drop by the Tokyo Linux User’s Group booth at OSPN OSC and convert your PC to Linux today!

Lora Meshtastic BBS Testing Terms Details on some terms I will use:\nLoRa (“Long Range”) is a technology for transmitting data via radio signals. It’s designed for much longer distances than Wifi: the record for LoRa is around 3...

Tried to replicate an old style BBS connection over #meshtastic devices, like we had over phone lines in the past. Not just simple message push/pull, all the blinkenlights!

Details: blog.fluxcoil.net/posts/2025/1...
#lora #meshtastic #ham