How can decibel levels by negative on data collection and analysis software in radio astronomy?
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A “Decibel” represents the power to which 10 must be raised to equal the value & can be + – 0 + ( above 1 ) – ( below 1…
Leo Bodnor low jitter GPS-locked frequency clock source 1 Hz to 1.1 GHz output LE-1420
Configuration screen at LRO 30/8/2026: Information about the device & software/datasheet: I have recently acquired one of these to help me with interferometry. This device comes recommended by members of…
Alternative Radial Velocity Calculator to the Green Bank Observatory Radial Velocity Calculator
http://f4klo.ampr.org/vlsrKLO.php
What connector is used on FE-5650A rubidium time source?
Yes. The lower connector in your photograph is a 9-pin male D-subminiature connector, commonly called DB9/DE-9 male. So the mating connector you want for making a power lead is a:…
Why do sharks fin patterns of SIDs go up for some observers and down for others?
If by “shark-fin patterns” you mean the characteristic sharp rise/slow fall (or the reverse) seen in VLF SID recordings during a solar flare, the reason some observers see the fin…
Rubidium frequency standard arrives from China (purchased on Aliexpress).
This is used communications hardware. Hand-written on cardboard box is 10 MHz. THE FOLKOWING COMES FROM AN ANALYSIS OF THE PHOTOS ABOVE BY CHATGPT, AND REQUIRES CONFIRMATION EXPERIMENTALLY: You have…
Further analyses of the Kraken Discovery Hydrogen Line feed vs Nooelec Dipole Feed vs Cakepan Loop Feed
From Alex (originally posted on SARA Mailing list 22/8/2026): Observe the relative Signal Strengths & Signal/Noise of each: These 3 hour drift scan data sets were acquired using 300 second…
KrakenRF Discovery Hydrogen Line feed is a sophisticated shaped near‑field reflector that completes the beam‑forming illumination environment for the PCB radiator.
Alex many thanks. Wow — seeing the actual copper patterns on the other side of the board completely changes the picture. This isn’t a simple folded‑dipole board at all; it’s…
How to use the stalk holder on the Nooelec H1 feed to hold the stalk on the KrakenRF Discovery Dish H-Line feed Alex Pettit 20/8/2026
You have the Nooelec Dish .. I’d use that. Remove the nooelec Dipole & cut down the square tube and use it to hold the Discovery Feed. ( you can…
Where does UKRAA see the PicoMuon detector going in the future
FIRST POSTED BY PAUL HEARN ON MUONDETECTOR FORUM AUGUST 2026: ‘what’s the point’, but more ‘how does it move beyond the local user’s analysis and, where participants choose to do…