Generally, the bigger the better within practical limits. Consider its orientation  (N-S or E-W), where it will be located, will

Building a horn antenna tuned for the 21 cm (1420.405 MHz) hydrogen line is a popular and effective way to

I asked ChatGPT how to do this, and here is its suggestion:

WR-650 already covers 1.12–1.70 GHz, so 1.420 GHz sits comfortably in-band—you don’t need to resize the guide. What you do need is a

The WR14 waveguide (also known as WH14) is a rectangular waveguide used for millimeter-wave applications in the K-band. Here are the key technical specifications: Parameter Value Designation

The WR137 waveguide is a rectangular waveguide commonly used in the C-band frequency range, particularly for radar, satellite communications, and radio astronomy work just below the

The WR-90 waveguide is a rectangular waveguide commonly used for microwave signals, particularly in the X-band frequency range. Here’s a quick technical summary: Parameter Value Waveguide

Download disc image below – use Active@ Disc Image to install on new PC – install this image on USB

Do you mean the angular size of the Great Orion Nebula (M42)?

Yes — the RSPduo does include a bias-tee on its Tuner 2 SMA port. (SDRplay) Here are some details and caveats: