Andrew Sutkowski checked his feed and found monopole probe made of 1/8 inch copper tube far better at picking up 1420 MHz hydrogen signal than bare copper wire (information from…
A Kumar choke (often called the VE4MA or Kumar feed/choke) is a choke-ring / cavity around a horn/feed that suppresses unwanted surface and coaxial currents and “traps” or reflects energy…
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 set by your operating frequency and waveguide mode, not by…
Link below downloads video MP4 file:
https://www.astronomy.me.uk/wp-content/uploads/2025/11/Results-drift-scan-LRO-H2-two-orthogonal-monopoles-for-SARA-RTOP-021125.pptx
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
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 Wolfgang Herrmann 19:33And this one https://hsweb.hs.uni-hamburg.de/projects/nrt_monitoring/stockert.html
Copy of email sent to me by Ted Cline October 2025: How are coaxial relays controlled from the computer to allow software like SDR Sharp to collect calibration data vs…
Shows some hydrogen – need to complete full 24 hours and re-analyse. Note altitude and azimuth may be incorrect in these plots.
Yes — RF filters can significantly improve your ability to detect Jupiter’s radio emissions, depending on your setup and local RF environment. Here’s a breakdown of when and why they…
Admin