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
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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
Notes on attenuation from responses to questions asked on SARA Mailing List 5 January 2025
My Question: Hi, Basic question- say I save 2dB here by changing coax and 2dB there by doing something else. Does that mean the total saving is 2+2=4dB or, as…
Effect of changing 5m of RG58 coaxial cable into LMR400 coaxial cable
The following picture shows the theoretical improvement from making this change.
Changing coaxial cable on Solar Cooker Radio Telescope at LRO 2/1/2025
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…