How much of 1420 MHz band is protected in UK?
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In the United Kingdom, the L-band around the 1420 MHz hydrogen line is formally recognised and protected for passive scientific use, meaning emissions by other services are prohibited or very…
Radio Astronomy
Are there any variable capacitors on Amazon covering 10 uF?
I searched available parts online — but there really aren’t any continuous mechanical variable capacitors around ~10 µF on Amazon, eBay, or typical component suppliers. Mechanical variable capacitors (rotary types)…
How many pF in 1nF capacitor?
There are 1,000 picofarads (pF) in 1 nanofarad (nF).• 1 nF = 1,000 pF• 1 pF = 0.001 nFThis is a straightforward conversion based on the metric system where the…
Can a radio telescope parabolic mirror be made with number hexagons not electrically connected?
Yes — a radio telescope reflector can be made from separate hexagonal panels that are not electrically bonded together, provided certain conditions are met. This is actually very common in…
Live observation from LRO-SIDS5 on 1/3/2026 @ 20:19
This is a live observation from my new 134cm VLF/SIDs aerial which directly feeds into the computer soundcard.
How to make a simple cavity filter for 1420MHz
Designing a simple cavity filter for 1420 MHz (the neutral hydrogen line at 1420.405 MHz) is very practical for radio astronomy front ends, especially to reduce out-of-band interference before amplification.…
How can I set up an observatory level system for saving VLF images on my MiniPC and displaying them through a searchable database on my website?
Setting up MySQL on your own computer is generally straightforward, especially if you’re comfortable installing typical desktop software. The difficulty mainly depends on your operating system and whether you want…
Assessment of using an USB splitter to power my Raspberry PI at same time as SuperSID?
When querying ChatGPT on the viability of connecting an USB splitter cable from a DC-DC 12V-5V converter to supply a Raspberry Pi ZERO 2W and SuperSID preamp, ChatGPT gave this…
Initial Positive Data 134cm VLF Aerial with direct input into USB Soundcard LRO 25/2/2026
https://www.astronomy.me.uk/wp-content/uploads/2026/02/Initial-Positive-Data-134cm-VLF-Aerial-with-direct-input-into-USB-Soundcard-LRO-250226.pdf