Using radioactive test source on UKRAA Cosmicwatch muon detectors
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Two detectors in coincidence mode, one on top of other. Radioactive rock test sources from ebay – large and small ones – plus I have some pieces of lead which…
Radio Astronomy
Optical grease specifications and suggestions for cheap option to go between SiPM and scintillator in homemade muon detection
Untested advice from ChatGPT: The following comes from ChatGPT. I am unable to verify the content from personal experience. I have entered this advice onto this blog as part of…
Converting between relative RMS power to dB in order to make performance estimates of radio telescope systems
Hi Andy, Just been watching the recent April 2026 Drakes lounge and in particular your piece where you talked about how you worked with Jason to make a conversion between…
Some observers trying to measure the speed of light using two separating Cosmic Watch muon detectors have come up with results faster than speed of light. Are these results possible?
Short answer: no—those experiments are not actually measuring anything travelling faster than light. When Cosmic Watch–style muon setups give “superluminal” results, it’s almost always due to measurement/systematic effects rather than…
Measurements of 150cm solar cooker radio telescope that forms LRO-H2.
I am grateful to Alex Pettit for helping me calculate the dimensions. LRO-H2 Hydrogen Line Radio Telescope: Measurements in cm: Diameter 150.00Depth 24.00Focal Length 58.59 Radius Depth x 0.00 y…
Is there any benefit to using any other type of feed other than cantenna or loop feed for a small amateur radio astronomy dish for hydrogen line work & is there any benefit to adding a sleeve balun on Loop Feed?
Does this mean in practice that there is no practical reason to need any other type of feed other than cantenna or loop feed for a small amateur radio astronomy…
Which are best parts of the Milky Way to observe to test Hydrogen Line Radio Telescope systems?
Information from Alex Pettit: Courtesy of Marcus Leech & CCERA: It is Spot On. Two Bright Areas Dec+40 dg RA 2030 hrs Dec+20 dg RA 0615 hrs On small systems,…
What is ideal diameter copper wire to use for building a loop feed for hydrogen line radio astronomy?
wire dia : #18 ga or so is fine .. Nothing is exact .. or perhaps reworded ” It is impractical to attempt to derive an equation for the electrical…