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Spectrum Lab spectrum analyser software when I update the horizontal speed settings on the plotter it does not change the speed on the plot
If the horizontal speed in Spectrum Lab isn’t changing on the scrolling plot, it’s usually because the display timing is controlled somewhere else. In Spectrum Lab, the time axis speed…
First light LRO VLF Detection system based on direct input from aerial into sound card and Spectrum Lab software 14/2/2026 and demonstration that 23.4 kHz reception best with aerial pointed in different direction to frequencies of other VLF transmitters detected in UK
Settings on plotter in Spectrum Lab software – the title is the frequency of the VLF transmitter observed in kHz: Plot from first light at LRO on Spectrum Lab –…
VLF Settings for Spectrum Lab based on John Berman’s successful implementation of VLF/SID monitoring using this software 14/2/2025
https://www.astronomy.me.uk/wp-content/uploads/2026/02/John-Bermans-own-working-Spectrum-Lab-VLF-config-6-feb-2026.zip https://www.astronomy.me.uk/wp-content/uploads/2026/02/SID-Station-using-Spectrum-Lab-1.docx https://www.astronomy.me.uk/wp-content/uploads/2026/02/Spectrum-Lab-Manual.pdf https://www.astronomy.me.uk/wp-content/uploads/2026/02/Timing-errors-in-Spectrum-Lab-140226.pdf
Bright vs dark flocculi on solar surface
Flocculi are those mottled, cloud-like patches you see best in H-alpha or Ca II K light — they’re magnetic field regions showing up in the chromosphere. But the “bright vs…
Rules of thumb in constructing hydrogen line feeds for amateur radio telescopes
The “rules of thumb”: c/o Ed Harfmann: Foil coating waveguide (if making waveguide with aluminium foil) wrinkled – Is it more than 1/20th of a wavelength? 21 cm/20 = 1.05…
How to test Nooelec SAWBird H1 LNA using a NanoVNA
Following information is from Alex Pettit:
Skin depth of copper and aluminium, and its implications for building radio telescopes
The skin depth (δ) of RF in copper at 1420 MHz can be calculated using the formula: δ = √(2/(ωμσ)) Where: At f = 1420 MHz (the hydrogen line frequency):…
Construction manuals for VLF aerials for UKRAA VLF/SID Receiver and SuperSID Receiver
https://www.astronomy.me.uk/wp-content/uploads/2026/02/SuperSID-Manual.pdf https://www.astronomy.me.uk/wp-content/uploads/2026/02/VLF_Aerial_Assembly_Manual.pdf
Current state of construction of John Berman VLF/SID receiver and aerial system 13/2/2026
I’ve discovered following works with Spectrum Lab software on my Dell M6800 laptop: Plug audio cable into microphone socket on Dell M6800. Select line in rather than microphone when pop-up…