Radio observation in hydrogen line (1420MHz)

Here’s what does — and when/how you might use it: ✅ What the device does 🔎 Typical Uses / Why

From Dave’s brilliant data set suppled 27/11/2025 – (c) Dave Bracey 2025 – all rights reserved. Taken using Dave’s 150cm

In the SAWBird line of LNAs (e.g., for 1420 MHz, GPS, L-band), the SAW filter is the component that provides the ultra-narrow

In a radio telescope’s noise budget, spillover and ground reflection are two distinct ways unwanted radiation enters your receiver. They’re related but

Andrew Thornett: I could see potential benefit for having LNA at constant temperature. The easiest way to achieve that is

Short answer: the most expensive single-component front-end parts used for 1.420 GHz (H-line) work are cryogenic HEMT/InP LNAs and the associated cryogenic

This might be of interest to folks interested in amateur hydrogen line radio astronomy – it is the description of

There are quite a few different Nooelec RTL-SDR dongle versions, and the differences mostly come down to tuner chip, frequency range,

In an SDR, three related but distinct concepts often get mixed together: frequency, bandwidth, and sample rate. Here’s how they