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…
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 –…
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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…
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…
Following information is from Alex Pettit:
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):…
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
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…
Here’s a clean SWG table from 16 down to 30. Diameters shown in inches and millimetres. SWG Inches mm 16 0.0640″ 1.626 mm 17 0.0560″ 1.422 mm 18 0.0480″ 1.219…
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