Sourcing pipe to extend the perimeter of the 150cm satellite dish that forms LRO-H2
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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,…
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
The Bob Stricklin hydrogen line signal generator for testing hydrogen line radio telescopes
Bob has designed and made a neat little patch antenna which attaches to a NanoVNA to produce a 1420MHz signal to use to test hydrogen line systems. (1) Attach patch…
Performance of 150mm x 50mm aluminium box section as waveguide for hydrogen (homemade WR650) vs rectangular oil tin
The WR650 waveguide is an ideal choice to use with the SETI Horn of Plenty Hydrogen Horn Radio Telescope. I have noticed that 150mm x 50mm aluminium box section is…
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…
What is the ideal length of a piece of box section to make a homemade WR650 waveguide for hydrogen line work?
For a hydrogen-line feed made from rectangular box section, the waveguide only needs to be long enough to establish the TE10 mode and accommodate the probe/backshort arrangement. A useful rule…
How well would 150mm x 50mm aluminium box section work to manufacture a WR650 waveguide for hydrogen line radio astronomy? What other commonly available sizes could be used to manufacture homemade WR650 waveguides?
Dimensions of WR650 waveguide for hydrogen. For the neutral hydrogen line at 1420.4058 MHz, WR-650 is the standard rectangular waveguide size most commonly used. Its dimensions are: Dimension Inches Millimetres…
Current performance of LRO-H2 Solar Cooker Radio Telescope 150cm diameter
For 150cm diameter dish, I would expect significantly better peaks than is seen in this video from last few days. https://www.astronomy.me.uk/wp-content/uploads/2026/06/LRO-H2_DataCollect_Monopole1_2026-05-27-16-05.avi Andy