Moxon dimensions for radio scatter at BAA Radio Beacon and GRAVES
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Here are practical, build-ready Moxon dimensions for the two bands. I’m using standard Moxon A-E notation (A = overall width; B = tip gap between element ends; C = feedpoint…
Common Ferrite Types (and Their Useful Ranges)
Common Ferrite Types (and Their Useful Range)Ferrite MaterialﾠTypical Trade NameﾠEffective Range (MHz)ﾠTypical Use#31ﾠFair-Rite mix 31ﾠ1 – 300 MHzﾠWideband RFI suppression (HF/VHF)#43ﾠFair-Rite mix 43ﾠ25 – 300 MHzﾠVHF suppression#61ﾠFair-Rite mix 61ﾠ200 –…
Very simple two module block GNU Radio GRC file to display input from SDRplay RSPduo receiver in single channel mode
Successfully detected Radio 2 with this today. https://www.astronomy.me.uk/wp-content/uploads/2025/10/Working-Simple-display-SDRplay-RSPduo-GRC-File-051025.zip
Instructions on how to install gr-radio-astro (contains set of GNU Radio modules required for DSPIRA GNU Radio Projects) & stand alone USB Flash Drive with preinstalled software & installing on a Raspberry PI
Releases: WVURAIL/gr-radio_astro gr-radio_astro This package provides GNUradio OOT modules and grc flowgraphs that fascilates Radio Astronomy Observations with software defined radio devices. There are two flavors of this projects: Installing…
Overriding maximum file upload limits in WordPress
There are WordPress plugins that let you raise or effectively remove file‐size limits (up to what your server / storage can handle). But a caveat: even with a plugin, you’ll…
Why mesh 5-10mm is fine for 21cm hydrogen line dishes
Example at the 21 cm Hydrogen Line For your 12-ft (3.65 m) dish, assuming ideal design efficiency η0=0.7\eta_0 = 0.7η0=0.7: RMS Surface Error (σ)ﾠσ / λﾠEfficiency (η/η₀)ﾠNet η 1 mmﾠ0.005ﾠ0.999ﾠ0.70…
External power from a low-noise amplifier (LNA) can potentially cause problems with an SDR (Software Defined Radio)
External power from a low-noise amplifier (LNA) can potentially cause problems with an SDR (Software Defined Radio), depending on how the power is supplied and whether the SDR’s RF input…
Key downloads for installing Linux Ubuntu with radio astronomy disc images and software from DSPIRA
https://www.astronomy.me.uk/wp-content/uploads/2025/10/gr-radio_astro-main-300925.zip https://www.astronomy.me.uk/wp-content/uploads/2025/10/DSPIRA_128GB_Pendrive_Ubuntu_Radio_Astronomy_Disc_Image_051025.zip https://www.astronomy.me.uk/wp-content/uploads/2025/10/DSPIRA_128GB_Pendrive_Ubuntu_Radio_Astronomy_Disc_Image_051025-1.zip https://www.astronomy.me.uk/wp-content/uploads/2025/10/ubuntu_radio_astro08_2022_2.zip https://www.astronomy.me.uk/wp-content/uploads/2025/10/ubuntu_radio_astro08_2022_2-1.zip
How to install self-extracting .run installer for SDRplay’s latest API for Linux
SDRplay’s latest API for Linux is distributed as a self-extracting .run installer. Here’s how to install it cleanly on a typical Linux system (e.g. Ubuntu/Debian, Fedora, or similar): 🧩 1.…
How to turn off Bitlocker in Windows to allow dual boot installation of Ubuntu
NOTE COMMAND LINE INSTRUCTION BELOW REQUIRED IF WINDOWS SAYS BITLOCKER NOT BEING USED AND UBUNTU INSTALLATION SAYS AT SAME TIME THAT SSD ENCRYTED WITH BITLOCKER Here’s how to turn off…