Radio observation in hydrogen line (1420MHz)

Waterproofing LRO-H3 (Alex Pettit Hydrogen Line Yagi)

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Radio observation in hydrogen line (1420MHz)

Is there any benefit to using any other type of feed other than cantenna or loop feed for a small amateur radio astronomy dish for hydrogen line work & is there any benefit to adding a sleeve balun on Loop Feed?

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Radio observation in hydrogen line (1420MHz)

Alex Pettit’s Instructions for making an umbrella antenna and cakepan loop hydrogen line feed:

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Radio observation in hydrogen line (1420MHz)

Key documents for making your own Jason Burnfield 1.5m mini hydrogen line radio telescope and using this to successfully take a spectrum on M31 Andromeda Galaxy (and hopefully even the M33 Triangulum Galaxy).

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