I would like to buy a 50 ohm terminal load to produce reference samples for 1420 MHz radio astronomy. Am I better off buying one designed for high wattage transmission…
Short answer: yes — but almost never as a single consumer LNA product.Two common approaches are used in practice: Details, tradeoffs and concrete parts: Why you don’t usually see “LNA…
In discussions with members of SARA, some of them have discussed that my mechanical Tohtsu CX-520D will degrade the signal too much, if I use it in front of the…
Short answer first: yes — the CX-520D does add only a very small insertion loss (~0.2 dB) at L-band, so if the LNA is mounted at the antenna (mast/head) the…
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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