Video recording from BAA Hydrogen Line Radio Astronomy Sub-Group Meeting 5 January 2026
Admin
This was a wonderful meeting, with membership of the group increasing in every meeting!
Admin
Radio Astronomy Cartoon: Electrocuted by the LNA
(C) Andrew Thornett 5/1/2026 All rights reserved.
Cantenna Design for Hydrogen Line Observations
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…
Testing coaxial relay & internal resistor in Nooelec SAWBird H1 Barebones LNA 04/01/26
This was a test inside house so hydrogen signal not detected.
Using large 4-5 metre mesh dishes for hydrogen line radio astronomy
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…
Cantenna Design for Hydrogen Line Observations
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…
Internet resources on hydrogen line radio astronomy
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 •…
What is a Power User?
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…
How starquakes allow astronomers to determine a star’s age
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…