I used a NanoVNA vector network analyser to analyse my spare Nooelec SAWBIrd H1 low noise amplifiers. In each case, the level is around 0dB – so, when 40dB attenuation…
Hi Andy, Sorry I’ve been driving all day so just seen this. I hope I’m not teaching you to suck eggs, but it seems from some of the posts that…
As 40dB attenuation in the circuit, then need to add 40dB to reading on VNA. Once this is done, it is clear that the SAWBird produces roughly 40dB of amplification…
Those are called anti-static bags or ESD (Electrostatic Discharge) bags. They are used to protect sensitive electronic components from static electricity damage during storage and transport. There are two main…
Download Powerpoint Presentation on this analysis and problems found in system and solutions: https://www.astronomy.me.uk/wp-content/uploads/2025/03/NanoVNA-Analysis-LRO-H2SCRT-270225.pptx Download timelapse of data collection using ezCol (ezRA):
Click below for data file 1 of 2: https://www.astronomy.me.uk/wp-content/uploads/2025/02/LRO-H1Ptarmigan_ezCol_1400-27MCavSAWB_FreqRef1417-405_Integ280000_BndWdth2-4_250225_20.txt Click below for data file 2 of 2: https://www.astronomy.me.uk/wp-content/uploads/2025/02/LRO-H1Ptarmigan_ezCol_1400-27MCavSAWB_FreqRef1417-405_Integ280000_BndWdth2-4_250226_00.txt
Click below to download Steve’s instructions (23 February 2025): https://www.astronomy.me.uk/wp-content/uploads/2025/02/Steve-Barrett-Liverpool-Uni-How-to-build-cloud-chamber-Feb-2025.pdf
In the UK, Military Band III typically covers the frequency range of 225 MHz to 400 MHz. This band is primarily used for military aviation, tactical communications, and secure data…
The following link goes to such a calculator (this link works as of 23 February 2025): https://www.gb.nrao.edu/GBT/setups/radvelcalc.html Further discussion on this subject can be found here (23 February 2025): https://astronomy.stackexchange.com/questions/41196/looking-for-a-routine-to-correct-for-local-standard-of-rest-lsr
I asked this question to ChatGPT today, which gave following answer: Aluminium and zinc spray paints contain fine metal particles suspended in a binder, but their electrical conductivity is significantly…
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