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…
This is the current batch file used with LRO-H1: REM NORMAL RESOLUTION (IE STANDARD SETTINGS) cd C:\cd C:\Data\ezRA_Program+Data\LRO\py ..\ezRA\ezCol.py -ezRAObsLat 52.7 -ezRAObsLon -1.8 -ezRAObsAmsl 81.0 -ezRAObsName LRO-H1(Ptarmigan)ezCol_1400-27MCav+SAWB_LMR400_FreqRef_1422-405_Bandwidth_1-000_El-40-1_Az_163 -ezColAzimuth 163 -ezColElevation…
Detecting the hydrogen line at 1420.4058 MHz is a popular project among amateur radio astronomers, and several software-defined radios (SDRs) are suitable for this purpose when paired with appropriate antennas…
Detecting the 21 cm hydrogen line (the characteristic emission from neutral hydrogen in the Milky Way) requires a radio antenna sensitive to that wavelength. The wavelength of this emission is…
This page has been created with the help of ChatGPT 11/1/2025. Compare performance and attenuation standard LMR-600 and flexible LMR-600 coaxial cables: The LMR-600 Standard and LMR-600 Flexible are both…
Filter arrangement 1: Ptarmigan Dipole Array ==> WT Microwave 1418-1422 MHz Cavity Filter ==> Nooelec SAWBird LNA ==> RTL-SDR Blog V3 Software Defined Radio. Filter arrangement 2: Ptarmigan Dipole Array…
Insertion Loss in Nooelec SAWBird H1: The Nooelec SAWbird+ H1 is a self-contained low-noise amplifier (LNA) module designed for hydrogen line detection around 1420 MHz. It features two ultra-low-noise amplifiers…
The following picture shows the theoretical improvement from making this change.
My son and I have changed the coaxial cable on my 1.5m parabolic solar cooker radio telescope from 5m of RG58 coaxial cable to similar length of LMR400 coax and…
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