I have installed baobab on my Raspberry PI 4B but not working.
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Let’s troubleshoot this step by step—on a Raspberry Pi 4, Baobab can fail for a few common reasons. First: what exactly happens? When you try to run it: If you…
April 2026
I have used active@ disc imager to save image of my 64gb ad card from my Raspberry PI 4B. I then used the use in active@ disc imager to burn a new copy of the image on a space unused 128gb sd card I had. I was hoping to increase available capacity on sd card. The new card does not work.
What you did should work in principle, but there are a couple of very common gotchas when cloning Raspberry Pi SD cards—especially when increasing size. Let’s go through the likely…
What is ideal diameter copper wire to use for building a loop feed for hydrogen line radio astronomy?
wire dia : #18 ga or so is fine .. Nothing is exact .. or perhaps reworded ” It is impractical to attempt to derive an equation for the electrical…
Alex Pettit’s Instructions for making an umbrella antenna and cakepan loop hydrogen line feed:
Alex Pettit’s Instructions for making an umbrella antenna and cakepan loop hydrogen line feed: https://www.astronomy.me.uk/wp-content/uploads/2026/04/Alex-Pettit-constructing-umbrella-antenna-cakepan-loopfeed-acc-170426.pdf
Key documents for making your own Jason Burnfield 1.5m mini hydrogen line radio telescope and using this to successfully take a spectrum on M31 Andromeda Galaxy (and hopefully even the M33 Triangulum Galaxy).
Jason Burnfield’s Excel Spreadsheet Design Tool and Instructions for his 150cm Mini Radio Telescope Dish: Alex Pettit’s Instructions for making an umbrella antenna and cakepan loop hydrogen line feed: Cold…
Alex Pettit’s Project: H-Line 3D:
Alex Pettit’s Project: H-Line 3D on Github: https://github.com/AP-HLine-3D/HLine3D
Ted Cline’s Easy Radio Astronomy (ezRA) Software Suite:
Ted Cline’s Easy Radio Astronomy (ezRA) Software Suite: https://github.com/tedcline/ezRA
How to point your drift detection hydrogen line radio telescope at the bright part of the Milky Way in Cygnus to test the performance of the system.
Many of the posts in the blog have discussed the development and use of hydrogen line radio telescopes, which work by pointing at the same azimuth and elevation, and on…
Cold Sky vs Hot Ground
Cold Sky vs Hot Ground: Here’s a quick test which will verify all is okay with your hydrogen line radio telescope: The difference between 10K cold sky & 290K Earth…
Jason Burnfield’s Design Tools and Instructions for his 150cm Mini Radio Telescope Dish
Corrected version of Jason Burnfield’s Design Tool: Hi Andy, This is the latest version of my Excel spreadsheet with design sheets for my original 2.74 meter dish, my mini dish,…