globalc

Playing with #JTTY is getting interesting. Think of it like an FT8, but more chat like, not sent out in 30sec time frames. halcyon.neon.jp.net/notes/ash9pv...

Playing with an own Fediverse instance, this time: #misskey . Seems nice so far! More lean than Mastodon, some nice features. My notes on setting it up with podman: blog.fluxcoil.net/2026/08/inst...

I compared a 20m-wire-antenna with a 1.6m long telescope antenna, and some more scenarios. Not to scientific, but interesting how much can still be accomplished with an antenna deployed inside the house. blog.fluxcoil.net/2026/08/comp...

I had my first #SOTA activation now. The first POTA was in Japan, now first SOTA here in Germany - all places where I feel 'at home' covered. :) Funny enough, this summit feels more like a park! Details: blog.fluxcoil.net/2026/08/firs...

For the owners of RTL-SDR devices: you can use nearby GSM base stations to calibrate your RTL-SDR. Here in Germany I can use GSM stations in 900Mhz area: fluxcoil.net/wiki/hamradi...

I had a successful #POTA activation: sat down in a park, deployed radio transceiver and antenna, and had connections with >10 remote stations. This combines what I learned in the last years. Details on the used tech, scratching the ice berg though: blog.fluxcoil.net/2026/07/star... #HAM

I got a used MacBook Air M1, for use as portable desktop and for HAM activities from parks and summits. Of course I'm using Fedora Asahi Remix on the system. Details on encrypting the disk: blog.fluxcoil.net/2026/05/fedo... #linuxonair #HAM

The #cardputer is quite nice for #meshtastic and #meshcore . Details: blog.fluxcoil.net/2026/05/card...

This is great, on so many levels. #cw #hamradio #typography potacw.guide

I finally got around to write about the various rabbit holes around #HAMradio which I got aware of. And probably also forgot a few. :) blog.fluxcoil.net/2026/04/the-...

There is not only a list of Tokyo's design manholes at www.gesui.metro.tokyo.lg.jp/pr/kouhou/de... , but also a map at ekikaramanhole.whitebeach.org/ext/manholec... . Neat!

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

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

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...

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...

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...

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

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

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

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!

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