Is the speed of light a real speed?
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Yes — the speed of light is a real, physically measurable speed. The quantity usually denoted c is the speed at which electromagnetic waves propagate through a vacuum. Its defined…
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How does a mutual ground level form between receiver and transmitter at distance from each other? And how does this apply to radio astronomy?
This is one of those things that feels mystical until you unpack it — then it’s just physics quietly doing its thing. Short answer:There isn’t really a “mutual ground level”…
Hook-Up Wire: Technical Reference Guide
Hook-Up Wire: Technical Reference Guide Hook-up wire is a single-conductor insulated wire used for internal electrical connections within electronic and electrical equipment. It is most commonly applied in low-voltage systems…
Paradar X-400 coaxial cable
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…
My new theory of Quantum Gravity……and why it doesn’t work!
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,…
Another look at reflections By: M. Walter Maxwell, W2DU/W8HKK, 1973-1999
This series appeared in the April 1973, June 1973, August, 1973, October, 1973, April 1974,December 1974, and the August 1976 issues of QST magazine.Copyright 1973,1974,1976, 1999 American Radio Relay League.…
How to use WHISPER TRANSCRIPTION software to obtain a transcription of a video file
Following is relevant to when you have a video or audio file, and you want to turn its speech into an editable text document (like a transcript): 🔧 Options for…
AliExpress direct-from-China shopping website search can feel wildly off-topic, when I search for items relevant to astronomy – how can I improve my searches?
Yeah, you’re not imagining it — AliExpress search can feel wildly off-topic. That’s not you, that’s how it’s built. Here’s what’s going on behind the curtain 👀 1. It’s not…
How to Free Up Space in Linux Ubuntu When Root (/) Partition Is Full &, if necessary, extend your root partition (/)
How to Free Up Space in Linux Ubuntu When Root (/) Partition Is Full &, if necessary, extend your root partition (/) Freeing up space in the existing sized root…
How do I find F and D if I don’t know them? (Focal length and diameter of a radio dish)
Short, honest answer first: you can’t get absolute F or D from the dish shape alone without at least one real measurement. A parabola has no inherent scale. But —…