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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…
Metric equivalent of 1/8 inch diameter bolt to use as monopole probe on cantenna
An 1/8-inch diameter bolt is 3.175 mm in metric.The nearest standard metric size is: ✅ M3 bolt (3 mm diameter) Alternatives If you need something closer to the exact 3.175…
SRD-05VDC-SL-C Relay
It is a relay for 5V signal control that can be applied and used in areas requiring various contact control. It can receive a 5V signal and control the power…
SRD-12VDC-SL-C Relay
The SRD-12VDC-SL-C is a small and dependable relay. It uses 12V DC power. It has SPDT contacts that switch between two circuits safely. This relay can handle up to 10A…
Chokes for hydrogen line cantenna feeds
A choke can be added to a cantenna feed to improve performance by suppressing unwanted common-mode currents on the outside of the coaxial cable shield. This results in a cleaner…
Pyramidal Horn Calculator with examples for 1420 MHz hydrogen-line pyramidal horn build.
This calculator calculates the optimal dimensions of a Pyramidal Horn. Click on link below to see examples of calculation for hydrogen line radio observing (1420 MHz): https://www.astronomy.me.uk/wp-content/uploads/2025/12/Pyramidal-Horn-Calculator-with-examples-091225.pdf