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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 than cheap small receive-only version?

I would like to buy a 50 ohm terminal load to produce reference samples for 1420 MHz radio astronomy. Am

Short answer: yes — but almost never as a single consumer LNA product.Two common approaches are used in practice: Details, tradeoffs

In discussions with members of SARA, some of them have discussed that my mechanical Tohtsu CX-520D will degrade the signal

Short answer first: yes — the CX-520D does add only a very small insertion loss (~0.2 dB) at L-band, so if

Comparing LNA at masthead with coaxial switch in front of it, with Nooelec SAWBird H1 LNA with inbuilt 50 ohm

Command line used, after meeting with Ted Cline, where we tested various combinations of parameter settings, in order to find

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 @

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