Overriding maximum file upload limits in WordPress
Admin
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…
Admin
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…
How to rename an Ubuntu computer
You can rename your Ubuntu PC (i.e. change the hostname) in a few simple steps. Here’s how, depending on your Ubuntu version and whether you want to do it temporarily…
How to change a username in Linux
Good question — changing a username in Ubuntu is possible, but it needs care to avoid breaking permissions or SSH keys. Below is the safe, step-by-step method for renaming a…
How to switch your Linux keyboard layout to US (United States)
Here’s how to switch your Linux keyboard layout to US (United States), either temporarily or permanently. 🧩 Option 1 – Temporary switch (immediate effect) Run this in a terminal: That…
Comparison SDRplay RSPdx and RSPduo
Here’s a comparison of the SDRplay RSPdx vs RSPduo (and notes about the newer RSPdx-R2), aimed at how they differ for radio astronomy, HF/VLF/LF work, and general SDR use. If…