Great question — this gets into radiometer theory and feed design. If you add a second probe into your WR-650 feed at 1420 MHz, what happens depends on how you…
See Powerpoint below: https://www.astronomy.me.uk/wp-content/uploads/2025/05/Comparison-data-collection-peaks-on-LRO-H2-and-LRO-H3-23-240525.pptx
I used a screen recorder to record time-lapse of the ezCol screen over 24 hours then choose the frame with maximum gain demonstrated for hydrogen. Calculation of decibels involved: 20…
At last, successfully got this working! 13-element Patch Yagi tuned to 1420 MHz by Alex Pettit from USA (member of SARA). First light below – ezRA (Easy Radio Astronomy) used…
LRO-H3 1420MHz tuned aerial (Alex Pettit Plate Yagi) not showing difference between sky and ground. Why might this be? Handmade tuned 1420MHz with 13 elements and RTL-SDR Blog V3 software…
Time to protect the wood! The observatory is 8-10 years old now. I’ve replaced the roof at one point from the original felt to shingles. Regular creosote seems to have…
Made with some threaded screw rod and square nuts. Andy
Information from Lee at Astro Tuff Truk, together with spare tyre he kindly sent me. Andy Click on links to download instruction files in PDF and Microsoft Word format. PDF…
Photos of the new truck are below, next to the old homemade trolley I have been using last few years – that has done sterling work but I now need…
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