The “rules of thumb”: c/o Ed Harfmann: Foil coating waveguide (if making waveguide with aluminium foil) wrinkled – Is it more than 1/20th of a wavelength? 21 cm/20 = 1.05…
Following information is from Alex Pettit:
https://www.astronomy.me.uk/wp-content/uploads/2026/02/SuperSID-Manual.pdf https://www.astronomy.me.uk/wp-content/uploads/2026/02/VLF_Aerial_Assembly_Manual.pdf
I’ve discovered following works with Spectrum Lab software on my Dell M6800 laptop: Plug audio cable into microphone socket on Dell M6800. Select line in rather than microphone when pop-up…
Here’s a clean SWG table from 16 down to 30. Diameters shown in inches and millimetres. SWG Inches mm 16 0.0640″ 1.626 mm 17 0.0560″ 1.422 mm 18 0.0480″ 1.219…
I have just taken delivery of 5m run of Paradpr X-400. This is meant to be a cheaper alternative to LMR-400 cable, but with similar specifications. My initial impression is…
Here are the standard brass tube sizes that will fit snugly either inside or outside 1/8-inch brass tubing: 📏 Basic Dimensions of 1/8″ Brass Tube So you want tubing whose…
The Theory: I have been thinking about how quantum physics joins up to gravity. How about this? Quantum physics tells us you can’t know whether something is present with certainty,…
An FIR filter (Finite Impulse Response filter) in GNU Radio works by applying a weighted sum of a finite number of input samples to produce each output sample. Let’s break…
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