Cygnus A hydrogen source type from SARA Meeting 21/12/2025
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@Rick K0GD Cyg A is a continuum source, so you won’t see it in hydrogen line. Instead you will just see an increase in power over the whole spectrum when…
Radio observation in hydrogen line (1420MHz)
Linear vs switched mode power supplies
Here’s a clear, practical comparison, with an emphasis on noise-sensitive and technical uses. Linear Power Supply (LPS) How it works Mains → transformer → rectifier → smoothing capacitors → linear…
Julian Palmer Design Monopole Probe Assembly for Cantenna 12/12/2025
Our intention is to design a cantenna where fine tuning can be achieved experimentally in the same device without needing to re-make the cantenna or physically cut bits off the…
Actions carried out to try and get ezCol.py working with USB Relay board 11/12/2025
Your ezCol.py does not start with a shebang (#!/usr/bin/env python3).Instead, the first line is just: ➜ That means Linux has no idea which Python interpreter to use. So when you…
How about 6 x 7.5 inch can for hydrogen line? How does that compare with a can 160mm diameter x 165 mm height?
How about 6 x 7.5 inch can for hydrogen line? Short answer: you can use a 6″ × 7.5″ can-sized aperture, but it’s very small for the 1420.40575 MHz hydrogen…
Is 145mm or 165mm better diameter for hydrogen line cantenna? Is a can that is 160mm diameter x 165 mm height a good choice for this?
Short answer: 165 mm is the better choice than 145mm can — it gives a larger aperture (higher gain / narrower beam) while still remaining single-mode for 1420.4 MHz. Below…
Successful use of hidusb-relay-cmd.exe from USB HID relay software v2.1 (latest 041225) (Win64): on 11/12/2025
Running Pavel-a hidusb-relay-cmd.exe from USB HID relay software v2.1 (latest 041225) (Win64): Download from releases on right side on screenshot below the Windows version of the software. This works on…