Does it matter what the monopole aerials inside a waveguide such as a cantenna waveguide are made of?
Andrew Sutkowski checked his feed and found monopole probe made of 1/8 inch copper tube far better at picking up
Read moreastronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)
Astronomy observatory in Staffordshire, England.
astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)
Astronomy observatory in Staffordshire, England.
Comparison of energy consumption of Raspberry PI generations 3, 4 and 5, and typical mini-PC used at LRO
Here’s a comparison of typical power consumption (no peripherals or display) for each device, measured at the wall under different workloads.
Read moreWhat is a Kumar choke for radio frequencies?
A Kumar choke (often called the VE4MA or Kumar feed/choke) is a choke-ring / cavity around a horn/feed that suppresses unwanted
Read moreIn LRO-H2, I use a cantenna as my waveguide, and aim this at the dish, rather than out into space. Does the presence of the dish change the ideal dimensions for the cantenna and position and length of the monopole inside it?
Short answer: No—the dish doesn’t change the waveguide dimensions of the cantenna.The can’s internal diameter and the probe/back-short geometry are
Read moreData collection video from LRO-H2 (150cm Dish & cantenna waveguide at 1420 MHz) with beta SDRplay RSPduo ezCol 01/11/2025-02/11/2025
Link below downloads video MP4 file:
Read moreTalk on Possible Radio Astronomy Projects to be taken forward by Walsall Astronomy Society 13/11/2025
https://www.astronomy.me.uk/wp-content/uploads/2025/11/Proposed-club-RA-projects-Walsall-Astro-Soc-131025-DRAFT-031125@1700.pdf https://www.astronomy.me.uk/wp-content/uploads/2025/11/Proposed-club-RA-projects-Walsall-Astro-Soc-131025-DRAFT-031125@1700.pptx
Read moreResults drift scan LRO-H2 two orthogonal monopoles for SARA RTOP 2/11/2025
https://www.astronomy.me.uk/wp-content/uploads/2025/11/Results-drift-scan-LRO-H2-two-orthogonal-monopoles-for-SARA-RTOP-021125.pptx
Read moreProcessing first light data from LRO-H2 using beta ezCol SDRplay Python script 2/11/2025
https://www.astronomy.me.uk/wp-content/uploads/2025/11/Beta-ezCol-SDRplay-Data-Analysis-First-Light-for-SARA-RTOP-021125.pptx https://www.astronomy.me.uk/wp-content/uploads/2025/11/LRO-H2_RSPduo_251102_00.zip https://www.astronomy.me.uk/wp-content/uploads/2025/11/Ted-Clines-new-ezCol-and-SDRplay-drivers-251101a.zip
Read moreWhat sample rate should I use in the GNU Radio SDRplay RSPDuo block for 1420MHz radio astronomy data collection?
SDR Play RSPduo – in gr-sdrplay3 module in GNU Radio it asks me to put in separate sample rate in
Read moreReferences on OH maser spectra and variability from SARA RTOP meeting 2/11/2025
V669 Cas is quite variable it seems… https://hsweb.hs.uni-hamburg.de/projects/nrt_monitoring/stockert.html eduard 19:32This is also a very good resource for OH maser spectra and variability: https://hsweb.hs.uni-hamburg.de/projects/nrt_monitoring/index.html
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