Live stream from 1420MHz hydrogen-line 86cm Ptarmigan Triffid Dipole Array

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Radio observation in hydrogen line (1420MHz)

Is there any advantage to making a cantenna feed where the sides are not parallel?

Radio observation in hydrogen line (1420MHz)

Alex Pettit: SDR# > IFavg > HL3D > Rinearn-3D for Hydrogen Line Radio Astronomy

Radio observation in hydrogen line (1420MHz)

Shaik Samad Pasha’s dimensions for his hydrogen line horn antenna used in his CHART-21 project.

Radio observation in hydrogen line (1420MHz)

Dimensions of my WR-650 hydrogen line rectangular feed purchased from ebay Dec 2025