There isn’t a single formal “amateur deep space network,” but there are several organised groups and communities of radio amateurs and citizen-science teams that regularly detect carriers from interplanetary probes.…
Installing Linux on a Mac depends mainly on which type of Mac you have: I’ll outline both methods. 1. Installing Linux on an Intel Mac (Most Flexible) Step 1 —…
The torque required depends mostly on three things: If the dish is perfectly balanced around the elevation axis, the motor only needs to overcome friction and inertia, which is quite…
Dale Hitherington’s online calculator (WA4DSY): https://www.wa4dsy.net/cgi-bin/idbpf
New process to clean up hydrogen line data, removing RFI. https://github.com/AP-HLine-3D/HLine3D/blob/main/JAVA_HL3D_mX%2Bb_RFI_V2.2_08Mar26_IFAvg2csv.jar start with zero frequency width and gradually widen.
A SID stands for Sudden Ionospheric Disturbance. It refers to a rapid change in the ionosphere caused by intense solar radiation, usually from a solar flare. These disturbances are commonly…
Yes — there are several practical disadvantages of using a SAWBird H1 (or similar surface-acoustic-wave bandpass filter) compared with a cavity filter in RF front-ends, especially at VHF/UHF, narrow-channel, or…
Amplifier examples relevant to discussion below of receiver chains that involve amplifier before a cavity filter: Budget amplifiers: Better quality amplifiers: Even better and more expensive amplifiers: Description: Yes —…
A surprisingly effective improvement for hydrogen-line reception is optimising the feed illumination of the dish. Many amateur systems lose several dB simply because the feed does not illuminate the reflector…
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