Some parts and alternatives that might help mount a ~30 cm or ~40 cm aluminium ring for waveguides — including raw material you can machine or tube rings / mounting…
How to Free Up Space in Linux Ubuntu When Root (/) Partition Is Full &, if necessary, extend your root partition (/) Freeing up space in the existing sized root…
Great question — this is one of those radio-astronomy tricks that feels almost too simple until you see why it works. The key idea A 50 Ω resistor at a…
This antenna is used on LRO-H3 at LRO. From Alex Pettit: The spacers and plates are aluminum. The threaded rod they sit on is steel. Measure the DC resistance from…
On Monday, 26 January 2026 at 08:32:18 GMT, andrew.thornett via Society of Amateur Radio Astronomers <sara-list@googlegroups.com> wrote: I notice that the SETI Horn of Plenty is a smaller version of…
Link below to URL of webpage with such a calculator: https://www.everythingrf.com/rf-calculators/pyramidal-horn-antenna-gain-calculator
Short, honest answer first: you can’t get absolute F or D from the dish shape alone without at least one real measurement. A parabola has no inherent scale. But —…
The (Nooelec NESDR Smartee) USB SDR dongle does not have a publicly listed official “design or operating temperature range” in its published specifications from Nooelec. The manufacturer datasheets and product…
Dip in Muons detected on the UKRAA PicoMuon detector at LRO 20/1/2026: Yes — they’re very likely related. Here’s why: 📡 What happened on 19–20 January 2026 🌍 How CMEs…
Short answer: no — not by itself 🙂 The QT GUI Vector Sink does not inherently show frequency offset from centre. It just plots whatever numbers you feed into it,…
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