Confusion between WR-65 and WR-650 rectangular waveguides
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Here’s the clarification you need: ✅ WR-650 is a real, standard rectangular waveguide ❌ WR-65 is not a standard rectangular waveguide designation How the naming works So the confusion boils…
Radio observation in hydrogen line (1420MHz)
What does the 650 in WR650 waveguide name stand for?
WR-650 is the ideal rectangular waveguide for hydrogen line work. WR stands for Waveguide, Rectangular, and the number refers to the internal broad-wall dimension in hundredths of an inch. Specifically:…
Can an effective hydrogen line cantenna be 3D-printed by painting conductive paint on plastic printing material with or without copper infusion?
Conductive paint on a plastic cantenna without copper infusion in the plastic printing material: Short answer: usually no — conductive paint on a plastic cantenna is very unlikely to give…
Designing tuneable LRO aluminium stove pipe cantenna H-Line 16/1/2025
Making tuneable length monopole to maximise cantenna waveguide function: As can be seen in photo below, I have purchased a threaded copper sleeve (sold as brass coupling nuts) and a…
Plan and measurements of proposed LRO Hydrogen Line Horn Antenna 14/1/2026
https://www.astronomy.me.uk/wp-content/uploads/2026/01/Plan-Measurements-for-LRO-Horn-of-Plenty-140126.pdf
Small Hydrogen Line Radio Telescope Background Drift/Shift – Dark Frame Correction
Click on link below to download Alex Pettit’s PDF document on dark frame correction options in hydrogen line radio astronomy for amateurs. https://www.astronomy.me.uk/wp-content/uploads/2026/01/Alex-Pettit-Dark-Frame-Correction-v04-141125.pdf
Principals of design of geodesic radio dish
Note some of the following is based on AI search results and has not been fully confirmed. So please check other data sources before using this content in your own…
Does a geodesic dome naturally form a parabola? (Relevant to design of geodesic parabolic radio astronomy dish)
A geodesic dome doesn’t actually form a parabola—but it very often looks like one, and that’s where the confusion comes from. Here’s what’s really going on. 1. What a geodesic…
One design for making parabolic radio astronomy dishes is to use a geodesic design – how do amateurs make a parabolic dish using this?
Amateurs use geodesic techniques to approximate a true paraboloid with many small, flat facets arranged on a spherical/geodesic framework, then “pulled” into a parabolic shape. The approach is popular because…