I was using a screen recorder (Debut) to record a Microsoft Teams meeting tonight. However second half lost its sound, which occurred after I ran a GNU Radio Companion script…
https://www.astronomy.me.uk/wp-content/uploads/2025/11/How-to-back-up-entire-Ubuntu-system-291125.docx https://www.astronomy.me.uk/wp-content/uploads/2025/11/How-to-back-up-entire-Ubuntu-system-291125.pdf How to back up entire Ubuntu system (content of downloadable versions above repeated below in this post): From https://askubuntu.com/questions/7809/how-to-back-up-my-entire-system 29/11/2025 Refer to this howto: http://ubuntuforums.org/showthread.php?t=35087 FILES In simple…
From Dave’s brilliant data set suppled 27/11/2025 – (c) Dave Bracey 2025 – all rights reserved. Taken using Dave’s 150cm homemade backyard radio telescope in Bromyard, England, UK, 2025.
✅ When copper-wire properties start to matter. 1. Inductance becomes noticeable around ~10 kHz and up A typical straight copper wire has about: Inductive reactance: Example for L = 1…
An inductor is one of the simplest components in electronics, but its behaviour comes from a deep physical effect: a current creates a magnetic field, and changing that current induces…
How Resonant RF Circuits Work: Resonant RF (radio-frequency) circuits—also called LC resonant or tuned circuits—use an inductor (L) and a capacitor (C) to create a natural oscillation at a specific…
In the SAWBird line of LNAs (e.g., for 1420 MHz, GPS, L-band), the SAW filter is the component that provides the ultra-narrow preselection that makes these modules so effective for…
In a radio telescope’s noise budget, spillover and ground reflection are two distinct ways unwanted radiation enters your receiver. They’re related but not the same: Spillover Spillover is receiver noise…
You can get a Raspberry Pi disk image in a few different ways depending on what you mean: 1. Downloading an official Raspberry Pi OS image If you simply want…
Material choice affects an antenna’s efficiency, bandwidth, durability, and mechanical practicality. Here’s a concise breakdown of what really matters: 1. Electrical Conductivity This is the biggest factor. High-conductivity metals (copper,…
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