Comparing LNA at masthead with coaxial switch in front of it, with Nooelec SAWBird H1 LNA with inbuilt 50 ohm resistor which can be switched in and out for generation…
Command line used, after meeting with Ted Cline, where we tested various combinations of parameter settings, in order to find one which worked, is below. Note in particular that the…
https://www.astronomy.me.uk/wp-content/uploads/2025/11/ezColS251107cPeeee.zip
Latest ezCol beta testing with SDRplay RSPduo device on LRO-H2 radio telescope. Command Line: Parameter options in ezCol: Screenshot @ 15:05: Screenshot @ 16:37: Screenshot @ 18:20: Screenshot @ 21:30:…
There is now a new playlist, to make it easier to access these recordings: https://www.youtube.com/playlist?list=PLzBTybazXT4123hs3KiBO28PeMTzc6Cks
Since the SDRplay RSP family of devices ‘thinks’ in terms of ‘gain reduction’ (i.e. attenuation), the values you want to assign to the IF and RF gain are always negative:…
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Here’s a practical “all the ones that matter” list, with 2025 peak nights and typical peak rates (ZHR under dark, clear skies). For the exhaustive working list (including many minor/variable…
Or….Options in the “RF switching without the clacky bits”! A solid-state coaxial relay is basically an RF switch that uses PIN diodes or GaAs FETs instead of a mechanical armature.…
ChatGPT: For 1420 MHz reference switching where speed doesn’t matter, go with a latching electromechanical DPDT transfer (coaxial) switch. It gives you the cleanest path, excellent isolation, and rock-solid matching.…
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