Simple DIY motorised mount for a 150 cm radio dish
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For a simple DIY motorised mount for a 150 cm radio dish, the easiest and most robust approach is a basic Alt-Az mount using two linear actuators. This avoids complex…
Radio Astronomy
Motorised mounting options for 1.5m radio dish
For a 1.5 m radio dish, the best motorised mounting depends on how accurately you need to point it and whether you want full sky tracking or just the ability…
How is metal protective paint such as Hammerite made?
Protective metal paints such as Hammerite are essentially coatings engineered to seal metal from oxygen and moisture, which prevents corrosion (rust). Their formulation is a combination of resins, pigments, corrosion…
LABprofile HI Profile Searches
Link to access LABprofile: https://www.astro.uni-bonn.de/hisurvey/euhou/LABprofile What LABprofile is: This interface allows you to extract HI profiles from the Leiden/Argentine/Bonn (LAB) survey. The profiles are generated on your request from the…
I am trying to run Python script under Windows which accesses a MySQL database online. When I run the script, I get the error “No module named mysql”
The error “No module named mysql” means Python cannot find the MySQL connector library in your current environment. On Windows, this usually happens because the MySQL package isn’t installed in…
I would like to be able to tune my antenna for my VLF to match it. Currently 10 uF capacitor is doing good job how can I do better?
I would like to be able to tune my antenna for my VLF to match it. Currently I am using a 10 uF capacitor, which seems to be doing a…
How bad a problem is intermodulation of RF at 1418-1422 MHz in UK?
In the UK, true in-band transmissions at 1418–1422 MHz are essentially nonexistent because this sits inside the internationally protected 1400–1427 MHz passive band allocated to radio astronomy and Earth-exploration (passive).…
How wide is cut off bandwidth for Nooelec SAWBird H1 LNA?
The is designed specifically for hydrogen-line (21 cm, ~1420 MHz) reception by combining a SAW band-pass filter with low-noise amplifier stages. According to the manufacturer’s published specs: 📶 Bandwidth /…
How much of 1420 MHz band is protected in UK?
In the United Kingdom, the L-band around the 1420 MHz hydrogen line is formally recognised and protected for passive scientific use, meaning emissions by other services are prohibited or very…
Are there any variable capacitors on Amazon covering 10 uF?
I searched available parts online — but there really aren’t any continuous mechanical variable capacitors around ~10 µF on Amazon, eBay, or typical component suppliers. Mechanical variable capacitors (rotary types)…