For 1420 MHz work, the advantage of a professionally manufactured WR-650 waveguide is usually much smaller than many people expect. Electrical performance A commercial WR-650 section will have: At 1420…
You are probably thinking of Louis Slotin. On 21 May 1946 at Los Alamos Laboratory, Slotin was demonstrating a criticality experiment using a plutonium core later nicknamed the “Demon Core.”…
Yes, 93,000 counts per minute (CPM) is a fairly strong reading for a Geiger test source, although how “large” it is depends on the detector and the source geometry. For…
I asked ChatGPT to explain following to me: From https://newatlas.com/telecommunications/flat-rooftop-satellite-antennas/ “Ground Control to Major Tom,” the evergreen lyrics to David Bowie’s 70s hit, Space Oddity. What’s odd is that, despite…
Yes. There are several free options that will transcribe your speech into text as you dictate: Smartphones Windows PCs Linux For long interviews or lectures My recommendation Since you use…
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…
Jason has calculated gain based on my plot below: I’m getting about 0.73 dB above background for that trace so pretty consistent with your previous results. Looks good! Jason Burnfield
At the 1420.405 MHz hydrogen line, the SETI Horn of Plenty is generally quoted at about +20 dBi gain (roughly +18 dBd). For comparison: Antenna Approx Gain (dBi) Approx Gain…
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…
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