The WR650 waveguide is an ideal choice to use with the SETI Horn of Plenty Hydrogen Horn Radio Telescope. I have noticed that 150mm x 50mm aluminium box section is…
Hydrogen-Line Detection vs Antenna Gain A measurement of 0.73 dB above background does not directly convert to dBi because they describe different things: So, whilst an attempt is made below…
https://active-antenna.eu/amplifier-kit Yes — the is actually a very good choice for VLF loop work and SID detection, much better suited than the LA-200 type devices. The important point is that…
If by “LA-200” you mean the common audio induction-loop amplifier units (such as the Sarabec LA-200), then no — it is generally not a good choice as a front-end amplifier…
Not a stupid suggestion at all. Temperature really does matter for detectors like the PicoMuon detector, especially because the silicon photomultipliers (SiPMs) inside produce thermal noise (“dark counts”) that rises…
This was originally posted by Andrew Thomas on muondetector groups.io mailing list 26/5/2026: The PicoMuon will behave oddly and even stop working if it gets too hot. This usually manifests…
A Yagi works by a different mechanism from a dish or horn, but the same underlying principle still applies: For any antenna, gain and effective aperture are linked by: where:…
The commonly quoted lambda/4 criterion is not really a limit on the flare angle itself; it is a limit on the resulting path-length or surface-position error caused by a construction…
On Monday, May 25, 2026 at 1:09:30 AM UTC-7 Andrew Thornett wrote: Can a horn be made larger simply by adding an extension to end of same flare angle, or does…
Answer by Jason Burnfield: On Tue, May 26, 2026 at 1:33 AM Andrew Thornett wrote: Can I ask you for your back of envelope dB calculation on the trace from my…
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