Oh no, you!

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Joined 1 year ago
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Cake day: November 3rd, 2024

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  • The gist of it is that antenna length can be “faked”. Sure, it’s not as good as matching the wavelength (or a fraction thereof) with your antenna, but it is possible to have a shorter antenna and have parts of the length being an inductive (or capacitive? I forget…) load that makes up for the missing length.

    Source: Used to do a lot if MF/HF installs on ships. Right before the actual antenna we use a Tuner, which is basically additional loads that helps matching the frequency. When transmitting on a new frequency, you key in the radio to let the tuner do its job, and then you rekey to do the actual talking. When the tuner is adjusting to the new frequency you can actually hear a series of relays clicking inside to connect the necessary loads.


  • While I do enjoy Qi (And TIL that Bill Baley is good at running backwards… I hadn’t seen that episode), I take some of their facts with a grain of salt, as it’s primarily an entertainment show. They do tend to oversimplify and miss some nuance from time to time.

    Just as an example, one such case was in regards to flight theory, where the correct answer to “how do planes fly” was “nobody knows”. While there isn’t a grand unifying theory that describes flight theory in full, we do have a lot of individual concept that describe 99.9% of how flight works. It’s like saying “nobody knows” in regards to why the earth orbits the sun on the basis that we don’t have a unifying theory between quantum field theory and gravity.

    I’m not disparaging Qi, though. It’s still a fantastic show, but it’s meant to be entertaining rather than complete.

    EDIT: Yes, “Qi”, not “Windows”. Ducking autocorrect.












  • If you’re asking specifically what the terminal windows I have open right now are for:

    • Shelled into a raspberry pi, running top to evaluate whether this project needs a better CPU than the Pi Zero W has.
    • vim, editing some Perl script that will go onto the pi.
    • a terminal that I forgot I had open. I think I used it yesterday for editing some systems stuff. I used to to run sed to replace a bunch of strings in a file.
    • ffplay rtsp://192.168.80.11/live (watching my printer to make sure the current print doesn’t turn into spaghetti)

    UPDATE: Shortly after writing the above, I opened a terminal, fired up vim, and started a shopping list for Thursdays shopping round. My kids need various clothes, and I needed to ensure that I had the sizes correct. Not everything done in a Linux terminal is H4xX0rZ.