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 preselection that makes these modules so effective for…
In a radio telescope’s noise budget, spillover and ground reflection are two distinct ways unwanted radiation enters your receiver. They’re related but not the same: Spillover Spillover is receiver noise…
You can get a Raspberry Pi disk image in a few different ways depending on what you mean: 1. Downloading an official Raspberry Pi OS image If you simply want…
Material choice affects an antenna’s efficiency, bandwidth, durability, and mechanical practicality. Here’s a concise breakdown of what really matters: 1. Electrical Conductivity This is the biggest factor. High-conductivity metals (copper,…
Andrew Thornett: I could see potential benefit for having LNA at constant temperature. The easiest way to achieve that is to cool it below any likely outside temperature – avoiding…
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 front-end systems (LNA + cryostat + cryocooler). Top…
Pulsars don’t have a single “pulsar frequency” the way spectral lines do — instead they emit broadband radio noise with periodic pulses, and what we observe are: Here are the…
sudo apt install git cmake build-essential gqrx-sdr cubicsdr libsoapysdr-dev soapysdr-tools gr-osmosdr uhd-soapysdr
This might be of interest to folks interested in amateur hydrogen line radio astronomy – it is the description of the SAWBird H1 directly from Nooelec’s website today 23/11/2025: https://www.nooelec.com/store/sawbird-h1.html…
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