Short answer: use the quietest DC you can. In practice that means: Why (and how) Hydrogen-line work is extremely sensitive to conducted and radiated hash. Switching PSUs produce combs that…
Here’s a concise, technically balanced comparison of SAW (Surface Acoustic Wave) filters and Cavity (Resonator) filters — especially relevant to radio astronomy, RF front-ends, and communications receiver design. 🧩 1.…
The attachments mentioned in the discussion below are available in following downloadable ZIP archive: https://www.astronomy.me.uk/wp-content/uploads/2025/10/Comparing-dish-sizes-performance-H-Line-311025.zip Here’s a practical comparison for your dish sizes at the HI line (1420 MHz), assuming…
The Mini‑Circuits ANNE‑50L+ is a very good choice for many purposes—let’s evaluate it specifically for your radio astronomy calibration use case (receive-only, around ~1.42 GHz). Below I’ll walk through its merits,…
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…
https://www.astronomy.me.uk/wp-content/uploads/2025/10/What-is-return-loss-261025-scaled.jpg
Compare RSP1 RSP2 RSPDuo HackRF PlutoSDR USRP. Here’s a practical, spec-level compare of the popular SDRs you named, with notes for radio astronomy / interferometry use. Device RX freq. range…
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