Professional radio astronomy dishes are engineered for electrical reflectivity, structural rigidity, thermal stability, and low weight. The exact construction depends on frequency range (long-wavelength vs millimetre work), but most large…
Hook-Up Wire: Technical Reference Guide Hook-up wire is a single-conductor insulated wire used for internal electrical connections within electronic and electrical equipment. It is most commonly applied in low-voltage systems…
Download ezPlotly files here: https://www.astronomy.me.uk/wp-content/uploads/2026/02/ezPlotly260214b.zip Hi Andy, Maybe try this. I attach 2 new programs, ezCon260214a.py ezPlotly260214b.py Very rough hacks but fun. Run something like, py ..\ezRA\ezCon260214a.py data -ezCon087Csv 4…
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 –…
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
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…
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