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LRO-H2 Radio Telescope (150cm Solar Cooker Dish) Radio observation in hydrogen line (1420MHz) SDRplay RSPduo Software-Defined Radio (SDR)

Processing first light data from LRO-H2 using beta ezCol SDRplay Python script 1-2/11/2025

Admin November 2, 2025 No Comments

Shows some hydrogen – need to complete full 24 hours and re-analyse. Note altitude and azimuth may be incorrect in these plots.

Attending & talking at conferences, workshops & societies

Photos of Dr Andrew Thornett giving an introductory talk on radio astronomy projects for amateur astronomers without experience in the area at the UK Astronomy Show 2025 near Coventry, UK, on 1/11/2025

Admin November 2, 2025 No Comments

Jupiter Radio Astronomy

Is there any advantage to using RF filters when detecting Jupiter radio emissions?

Admin November 2, 2025 No Comments

Yes — RF filters can significantly improve your ability to detect Jupiter’s radio emissions, depending on your setup and local RF environment. Here’s a breakdown of when and why they…

Radio observation in hydrogen line (1420MHz)

How physically big can a cavity RF filter be made? For example, is there an advantage to making a 50cm long cavity filter for 1420 MHz?

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Short answer: you can make a cavity “as big as you like,” but past a sensible size you don’t gain performance—and you often make things worse (more spurious modes, weight,…

Radio observation in hydrogen line (1420MHz)

What are the advantages and disadvantages of adding more digits in an interdigital RF cavity filter?

Admin November 2, 2025 No Comments

Adding more digits (fingers or resonators) in an interdigital RF cavity filter has several important advantages and disadvantages, depending on what you are optimizing for (selectivity, insertion loss, bandwidth, physical…

Jupiter Radio Astronomy

What happens if I put two x RF DC-22MHz filters in parallel?

Admin November 2, 2025 No Comments

Short version: “Parallel” doesn’t help—and can make things worse. Here are the three ways people mean “parallel,” and what actually happens: If your goal is to move the −3 dB…

Jupiter Radio Astronomy

I have a mini circuits DC-22MHz filter. Would it be possible to slightly adjust range up by 2MHz with extra components?

Admin November 2, 2025 No Comments

Short answer: not really. Mini-Circuits “DC–22 MHz” parts are fixed, 50 Ω-matched, sealed networks (usually elliptic/Chebyshev LC). To move the cutoff up by ~2 MHz you’d need to reduce the…

Jupiter Radio Astronomy

Mini-Circuits DC-22MHz low pass filter

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Linux for Radio Astronomy Windows

How to run Linux under Windows

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You’ve got three good ways to run Linux under Windows 11, depending on how much integration or isolation you want. Here’s a breakdown: 🥇 1. Use WSL 2 (Windows Subsystem…

Radio observation in hydrogen line (1420MHz) SDRplay RSPduo Software-Defined Radio (SDR)

Protected: Beta Test version of Ted’s new ezCol and ezCon for SDRplay 1/11/2025

Admin November 1, 2025 No Comments

There is no excerpt because this is a protected post.

Processing first light data from LRO-H2 using beta ezCol SDRplay Python script 1-2/11/2025

Photos of Dr Andrew Thornett giving an introductory talk on radio astronomy projects for amateur astronomers without experience in the area at the UK Astronomy Show 2025 near Coventry, UK, on 1/11/2025

Is there any advantage to using RF filters when detecting Jupiter radio emissions?

How physically big can a cavity RF filter be made? For example, is there an advantage to making a 50cm long cavity filter for 1420 MHz?

What are the advantages and disadvantages of adding more digits in an interdigital RF cavity filter?

What happens if I put two x RF DC-22MHz filters in parallel?

I have a mini circuits DC-22MHz filter. Would it be possible to slightly adjust range up by 2MHz with extra components?

Mini-Circuits DC-22MHz low pass filter

How to run Linux under Windows

Protected: Beta Test version of Ted’s new ezCol and ezCon for SDRplay 1/11/2025

You missed

Online interdigital RF cavity filter designer

Alex Pettit’s new RFI removal regime in H-Line 3D

Tell me what a SID (Sudden Ionospheric Disturbance) is and what range of frequencies are covered when monitoring for SIDs.

Protected: Resources for BAA GNU Radio for Radio Astronomy meeting 9/3/2026