SARA video that discusses measuring Tsys in hydrogen line amateur radio astronomy systems
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https://youtube.com/watch?v=4gVUFFxra-U&si=qBMd3ExnKxtG1oC0
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Does Yaesu G-5500DC antenna rotator have position feedback that could be used for pointing at and tracking masers?
Yes. The Yaesu G-5500DC absolutely has position feedback, and that’s one of the reasons it is so popular for satellite tracking. The system consists of: Inside the rotators are position-sensing…
Rectangular paint tin purchased to make WR-650 May 2026
I purchased one of these to make a cheap homemade WR-650 waveguide for hydrogen line work.
Cooling SDR on LRO-H4(SETI Horn of Plenty) [hydrogen line radio telescope at LRO].
The SDR (NESDR) crashed a number of times when temperature locally got up to 32 C a few weeks ago, very unusual for us. The miniPC and SDR sits in…
Testing resistance of aluminium window screening I bought for LRO-H2 perimeter extension to reduce ground noise
Result seems a bit high, when considering this following advice from ChatGPT: The resistance of aluminium window screen over 50 cm can vary enormously depending on how you measure it,…
Installing supports on LRO-H2 Solar Cooker Radio Telescope (hydrogen line 150cm dish) for aluminium netting
This netting will extend perimeter by 40 or 50cm around the edge and help reduce ground noise (I hope). Am I doing anything wrong before I go further? Andy
Factoids about radio telescopes vs optical telescopes
For say a 10 inch telescope mirror what size dish would equal the same resolving power. And even more mind blowing A 60‑foot (18.3 m) radio dish at 21 cm has the…
Testing radio telescopes with drift scan of the Sun
I am hoping to perform this test on LRO-H4 in the next week if I can. The following shows the current elevation of the Sun from Lichfield UK so I…
List Nooelec Software Defined Radios
Nooelec’s main RTL-SDR receiver families are: Here are Nooelec’s commonly sold software-defined radio (SDR) models and product lines (consumer/ham/RTL-based and more advanced units): Notes: For exact current model names, specifications,…
Eric Gibert/supersid: Cross-platform Sudden Ionospheric Disturbances (SID) monitor · GitHub
https://github.com/ericgibert/supersid