What is an Anti-Aliasing Filter?
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An anti-aliasing filter is a filter placed before a signal is sampled by an analog-to-digital converter (ADC) to remove frequencies that are too high to be represented correctly after sampling.…
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What is it called when two out of band RF frequencies combine with each other to produce 3rd frequency which causes in band RFI?
The phenomenon is called Intermodulation, specifically third-order intermodulation when two signals produce a third frequency that falls into your band. How it works When two strong RF signals at frequencies…
WTMicrowave 1415-1425 MHz Cavity Bandpass Filter WT-A11988-Q06 ordered 7/3/2026
Test data: https://www.astronomy.me.uk/wp-content/uploads/2026/03/260306_WT-A11988-Q06_1415-1425MHz_Test-Data.docx Test Curves: Batch of three filters ordered – test curves for all three below: Filters 1-3:
Does WordPress run under PHP?
Yes 👍 — WordPress runs primarily on PHP. How it works Simplified flow Typical hosting stack A common setup is the LAMP stack: There are also variants like LEMP (Linux…
LMX2820 22.6-GHz Wideband PLLatinum™ RF Synthesizer Product Info Sheet
https://www.astronomy.me.uk/wp-content/uploads/2026/03/LMX2820-22.6-GHz-Wideband-PLLatinum™-RF-Synthesizer-Product-Info-Sheet.pdf
Enabling fileinfo extension on PHP running under Windows
On Windows, the fileinfo extension is usually already included with PHP—you normally just need to enable it in php.ini. Here is the straightforward way to do it. 1. Find your…
Radio Jove Antenna Manual
Click on link below to download manual: https://www.astronomy.me.uk/wp-content/uploads/2026/03/RJ_Antenna_Manual_v2.1_2025_02_07.pdf
Simple DIY motorised mount for a 150 cm radio dish
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…
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 to make rust-protective paint at home?
A very simple rust-protective paint can be made with only a few ingredients. The idea is to create a water-repelling barrier containing rust-inhibiting pigment. Simple DIY Rust Paint (Traditional Style)…