Datasheet can be downloaded from link below – this was accessed 4/1/2026: https://www.astronomy.me.uk/wp-content/uploads/2026/01/Nooelec_Sawbird_H1_Barebones_Datasheet_Revision_1040126.pdf
These mesh dishes are certainly fine for the Hydrogen line and are probably good up to about 3 or 5 GHz. If you want to learn more about the performance…
A cantenna, essentially a form of circular waveguide, is a practical tool used in radio astronomy to detect the hydrogen line (1420.405 MHz). Here’s a comprehensive overview of its design…
Here are some good internet resources — guides, tutorials, and reference material specifically useful for getting into hydrogen-line (21 cm, ~1420 MHz) radio astronomy: 📘 Amateur & Practical Guides •…
A power user is someone who uses a product, system, or piece of software far beyond basic or casual use, taking advantage of its advanced features, shortcuts, customizations, and integrations…
Astronomers determine a star’s age using starquakes through a technique called asteroseismology. The basic idea is that a star’s internal structure changes in a predictable way as it ages, and…
Key messages from above table: The probe length does not change with cantenna diameter at the same design frequency. The overall can length goes down with increase in diameter. The…
The following calculations were developed with help of the calculator at https://3g-aerial.biz/en/online-calculations/antenna-calculations/cantenna-online-calculator
A ZIP file of the entire set of calculators from the SETI League website 1/1/2026. https://www.astronomy.me.uk/wp-content/uploads/2026/01/SETI-League-Excel-Spreadsheet-Templates-Calculators.zip
These may be debated by other builders……note I haven’t built this sized horn so cannot demonstrate its effectiveness – rather, this is my attempt to calculate the dimensions needed. https://www.astronomy.me.uk/wp-content/uploads/2026/01/Optimal-dimensions-of-3m-H-Line-Aperture-Horn-Antenna.pdf
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