WR650 Waveguide for hydrogen line radio astronomy
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If you want a rectangular waveguide that works well around 1.4 GHz, a common standard choice is WR650. ✅ Why WR650 at ~1.4 GHz ⚠️ What you lose by going too small…
Radio observation in hydrogen line (1420MHz)
Block diagram, parts list and checklist for using coaxial cable to waveguide adapter for hydrogen line radio astronomy
Here’s a ready-to-use block diagram plus a practical minimal parts list and quick build/test checklist so you can turn your WR-650 waveguide-to-coax adapter into a full waveguide feed for 1420…
How can I use a WR-650 coaxial cable to waveguide adapter as part of a hydrogen line receiving system?
Good questions. First, to be clear — by “convert … to a full waveguide” I assume you mean: you have a (a waveguide‑to‑coax adapter) and you want to use it…
How well would following work for hydrogen line LHCP HELIX DISH FEEDER 2.4GHZ (S-BAND) for OSCAR-100 / Es -HAIL -SAT?
Short answer up front: a 2.4 GHz LHCP helical dish feed is a perfectly sensible and widely-used solution for uplinking to Esʼhail-2 / QO-100 — but don’t confuse that with…
Losses at the masthead in hydrogen line systems
Nooelec’s documentation lists the SAWbird+ H1 (no 50 Ω “reference” termination present) at ≈0.8 dB NF and the versions that include the internal 50 Ω reference/termination at ≈1.05 dB NF…
Installing & Testing USB Relay on Linux Ubuntu
Prerequisites Before testing the USB relay, ensure you have the following installed: Installation Steps bash Copy Code sudo apt-get update sudo apt-get install git python3 libhidapi-dev libhidapi-hidraw0 python3-pip bash Copy…
Parabolic dish focal ratios & spillover angles
From Alex Pettit 2-3/12/2025: Its related to the Feed Beam Pattern and the Shape ( f/D Depth ) of the dish. “All” f/D 0.35 dishes perform similarly regardless of diameter…
What is a geodesic parabolic dish?
You’re thinking of a geodesic parabolic dish — a structure made from straight struts arranged in a triangular (geodesic) pattern that automatically forms an accurate paraboloid when assembled. This is…