Impedance of simple dipole 📡
The impedance of a simple dipole antenna is the measure of how much resistance and reactance it offers to the
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astronomy.network The Website of Lichfield Radio Observatory (LRO)
Andrew Thornett, Lichfield, England, M6THO, andrew (at) thornett (dot) net
Narrowband post-processing in Affinity Photo Software
According to ChatGPT….. To do **narrowband post-processing** in **Affinity Photo**, especially for astrophotography (e.g., H-alpha, OIII, SII), you can follow
Read moreComparison between HP ProDesk 405 G2, G3, and G4 Mini computers
The HP ProDesk 405 G2, G3, and G4 Mini are successive generations of small form factor business desktop PCs. The main differences
Read moreHP Mini 600 G4 isn’t detecting the Ubuntu installation after reboot.
It sounds like your HP Mini 600 G4 isn’t detecting the Ubuntu installation after reboot — a common issue that
Read moreTo completely reset your HP Mini 600 G4 and remove all traces of BitLocker, Windows, and old partitions.
To completely reset your HP Mini 600 G4 and remove all traces of BitLocker, Windows, and old partitions, you can fully wipe the internal
Read moreEuropean Astrofest 2026 dates
Kensington Conference and Events Centre, The Town Hall, Hornton Street, London, W8 7NX Opening times Friday 6th February 2026: 9am – 6pm
Read moreWhy M57 is a poor radio astronomy target for amateurs using H-Line radio telescopes
In short: no prominent absorption line in Messier 57 is known near the 21 cm hydrogen line (1420.4058 MHz). However, let’s break that
Read moreHow to force the Handbrake app in Windows to use MP4 with H.265 and retain your audio quality
If H.265 (x265) in HandBrake is defaulting to MKV instead of MP4, it’s because some video/audio combinations aren’t supported in MP4 containers.
Read moreOptions available in Windows 11 for resizing MP4 video files in a batch
For Windows 11 and resizing MP4 video files in batch, here are your best options: ✅ Option 1: FFmpeg (Recommended –
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