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…
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…
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…
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…
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…
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…
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
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,…
https://github.com/ericgibert/supersid
I have not been able to check the following method – so cannot guarantee that it works, nor that it won’t damage your device. If my SDR does not dry…
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