How much voltage would I loose on 5v linear power supply 5m cable to my LNA?
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To work this out properly we need one key missing detail: the cable conductor size (wire gauge or cross-section) and ideally the current drawn by the LNA. That said, I…
How linear power supplies work
Andrew, yes it appears to be pretty much the type of power supply that I was referring to. Although I generally dislike Amazon listings as far as technical information details,…
Is there a better RF switch than HMC849?
Whether a “better” switch than the HMC849 exists depends entirely on the specific application requirements, as different switches are optimized for different parameters. The HMC849 is a specific high-performance, non-reflective…
HMC8038 RF Switch Data Sheet and specifications
https://www.astronomy.me.uk/wp-content/uploads/2025/12/HMC8038-RF-Switch-Data-Sheet.pdf https://www.astronomy.me.uk/wp-content/uploads/2025/12/HMC8038-RF-Switch-Specifications.pdf
Calculating wavelength inside a cantenna at 1420 MHz (Hydrogen Line)
Use <ctrl> <+> on your keyboard to enlarge the image (full image over 1000 pixels wide)
SARA Analytical Section if it’s website and 20m Skynet dish at Greenbank
SARA’s web Analytical Section … https://www.radio-astronomy.org/node/200 talks of the 20m dish telescope.
Cygnus A hydrogen source type from SARA Meeting 21/12/2025
@Rick K0GD Cyg A is a continuum source, so you won’t see it in hydrogen line. Instead you will just see an increase in power over the whole spectrum when…
Linear vs switched mode power supplies
Here’s a clear, practical comparison, with an emphasis on noise-sensitive and technical uses. Linear Power Supply (LPS) How it works Mains → transformer → rectifier → smoothing capacitors → linear…
Github repositories relevant to USRP B210 SDR 17/12/2025
jocover/OpenUSRP using LimeSDR to simulate USRP B210 on 7 Aug 2021 busyrock/Osmocom-GSM-For-USRP–B210 All components of Osmocom GSM project on 19 Jun 2019 ismagom/b210_usb_error Small program to demonstrate an error in…