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
My SETI Horn of Plenty uses a WR-650 rectangular waveguide. What difference would it make to taper the waveguide down to a point rather than flat back to the waveguide?
If by “taper the waveguide down to a point” you mean replacing the flat shorted end behind the probe/feed with a pyramidal or conical taper that gradually narrows to a…
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…
Can I use the Yaesu G-5500DC antenna rotator to point a dish at a specific object in the night sky and track it? Could this be used to detect and follow masers?
ADVICE FROM CHATGPT (NO PROMISES MADE ABOUT HOW EFFECTIVE THIS ADVICE IS): Best value source for Yaesu G-5500DC antenna rotator and computer controller in the UK: If your goal is…
My SETI Horn of Plenty use a WR-650 waveguide. What difference would it make to taper the waveguide down to a point rather than flat back to the waveguide?
If by “taper the waveguide down to a point” you mean replacing the flat shorted end behind the probe/feed with a pyramidal or conical taper that gradually narrows to a…
Adding framework to LRO-H2 Solar Cooker 150cm rolled steel dish
This framework is designed to support an aluminium window netting to reduce ground noise. However, as soon as I added the wood to this an immediate potential issue arose –…
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…
Sourcing pipe to extend the perimeter of the 150cm satellite dish that forms LRO-H2
I would like to extend the edge of my 150cm satellite dish by 40-50cm all around with some aluminium mesh. This does not need to follow the parabolic as it’s…
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,…