Radio observation in hydrogen line (1420MHz)

How to test Nooelec SAWBird H1 LNA using a NanoVNA – from Alex Pettit

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LRO-H2 Radio Telescope (150cm Solar Cooker Dish) Radio observation in hydrogen line (1420MHz)

How to optimise focal position of Brian Colemans Hydrogen-Line feed on LRO-H2(Solar Cooker 150cm RT)–19/3/2026.

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Radio observation in hydrogen line (1420MHz)

Is central obstruction by feed important on hydrogen line dish?

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Radio observation in hydrogen line (1420MHz)

Waterproofing LRO-H3 (Alex Pettit Hydrogen Line Yagi)

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