Excellent and subtle question — and one that’s very relevant for radio astronomy calibration.Short answer: not all 50 Ω dummy loads are the same, even though they nominally measure “50…
The item described as “MVS +5/-5V 2S3020-95 SC00126-01 RF Pin Diode SPDT Switch” appears to be a PIN-diode based single-pole double-throw (SPDT) RF switch (i.e., using a PIN diode switch…
https://www.astronomy.me.uk/wp-content/uploads/2025/10/DS_CX_600NL-12V.pdf
Good choice — here’s a detailed comparison between the three models you’re considering: Tohtsu CX‑520D, Tohtsu CX‑600N, and Tohtsu CX‑600NL — with a focus on performance at ~1420 MHz (your…
How much uranium is it legal to own without licence in UK? Short answer: there isn’t a simple mass limit — UK law controls radioactive activity (becquerels), not kilograms. Small…
https://www.astronomy.me.uk/wp-content/uploads/2025/10/What-is-return-loss-261025-scaled.jpg
Download data sheet below: https://www.astronomy.me.uk/wp-content/uploads/2025/10/Mini-Circuits-SLP-21.4-Coaxial-Low-Pass-Filter-50Ohm-DC-22MHz-Data-Sheet-261025.pdf
The Orionid meteor shower is described by the Royal Museums Greenwich, London, website as: Orionids 22 October 2 Oct-7 Nov 15 Fast with fine trains. Associated with Comet Halley (https://www.rmg.co.uk/stories/space-astronomy/meteor-shower-guide-2025…
Two-core plastic-coated cable (e.g., speaker twin, figure-8) works fine for a VLF loop wound on a wooden cross. Here’s how to make it work well: So yes: two-core plastic cable…
Short answer: yes—two-core plastic-coated cable (e.g., speaker twin, figure-8) works fine for a VLF loop wound on a wooden cross. Here’s how to make it work well: So yes: two-core…
Admin