astronomy.network The Website of Lichfield Radio Observatory (LRO)

Detecting the hydrogen line at 1420.4058 MHz is a popular project among amateur radio astronomers, and several software-defined radios (SDRs)

Detecting the 21 cm hydrogen line (the characteristic emission from neutral hydrogen in the Milky Way) requires a radio antenna

This page has been created with the help of ChatGPT 11/1/2025. Compare performance and attenuation standard LMR-600 and flexible LMR-600

Filter arrangement 1: Ptarmigan Dipole Array ==> WT Microwave 1418-1422 MHz Cavity Filter ==> Nooelec SAWBird LNA ==> RTL-SDR Blog

Insertion Loss in Nooelec SAWBird H1: The Nooelec SAWbird+ H1 is a self-contained low-noise amplifier (LNA) module designed for hydrogen

These plots have been produced using data from Lichfield Radio Observatory (LRO) between 29 May 2024 and 18 August 2024,

Shows very low power levels on my system compared to the two comparators. Andy

From: ‘Alex P’ via Society of Amateur Radio Astronomers <sara-list@googlegroups.com>Sent: 04 January 2025 10:28To: Society of Amateur Radio Astronomers <sara-list@googlegroups.com>Subject:

From: ‘Alex P’ via Society of Amateur Radio AstronomersSent: 04 January 2025 10:28To: Society of Amateur Radio AstronomersSubject: [SARA] Re: