Smallest antenna that can detect hydrogen in Milky Way
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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…
2025
Compare performance and attenuation standard LMR-600 and flexible LMR-600 coaxial cables
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…
Comparison of results from processing LRO-H1(Ptarmigan Array Data) collected by ezCol.py (ezRA software suite) with two filter arrangements 1st to 8th January 2025
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…
Potential arrangements of Nooelec SAWBird H1, Nooelec LANA low-noise amplifier, and WT Microwave 1420MHz narrow band cavity filter, to improve radio-astronomy detection of hydrogen line.
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…
Mapping LRO-H1(Ptarmigan)data 290524-180824 to sphere (inside & outside views) 5/1/2025
These plots have been produced using data from Lichfield Radio Observatory (LRO) between 29 May 2024 and 18 August 2024, processed using new functions in latest version of Ted Cline’s…
Alex Pettit’s evaluation of October 2024 data set from my Ptarmigan Array radio telescope compared to two other radio telescope systems 6/1/2025
Shows very low power levels on my system compared to the two comparators. Andy
Importance of placement of LNA (Low Noise Amplifier) close to dish and not close to receiver
From: ‘Alex P’ via Society of Amateur Radio Astronomers <sara-list@googlegroups.com>Sent: 04 January 2025 10:28To: Society of Amateur Radio Astronomers <sara-list@googlegroups.com>Subject: Re: Adapter attenuation ~ 0.15 dB / adapter Please ‘Review’…
Attenuation of signal due to radio connector adapters
From: ‘Alex P’ via Society of Amateur Radio AstronomersSent: 04 January 2025 10:28To: Society of Amateur Radio AstronomersSubject: Re: Adapter attenuation ~ 0.15 dB / adapter