The HMC849 is a high isolation, non-reflective DC to 6 GHz SPDT (Single-Pole, Double-Throw) RF switch available in a 16-pin, 4×4 mm LFCSP surface-mount package. Data Sheet: https://www.astronomy.me.uk/wp-content/uploads/2026/01/Analog-Devices-HMC849a-data-sheet.pdf Key Pin…
This was a wonderful meeting, with membership of the group increasing in every meeting!
(C) Andrew Thornett 5/1/2026 All rights reserved.
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…
This was a test inside house so hydrogen signal not detected.
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 •…
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