Re: Shaded area under the Spectrum



Best settings when using an R2 barefoot on a decent 144MHz antenna on my side is under sdr#, sensitive mode and gain = 16. This is where I find the higher S/N.

Again, it is always a compromise between front-end gain and unwanted mixing/blocking so each location has its rules ...

With an external preamp at the feed of the antenna, R2 gain should be reduced down to 12, empircally found to be the best value as I am monitoring a WSPR beacon 500km apart.

R2 noise figure is around 8-10dB.

In order to correctly tune your R2, SDRCV3 has a S/N meter, just use it and play with the R2 settings in order to maximize the value.

73 Jean-Marc

Le 14/11/2021 à 08:19, George Stein - NJ3H via a écrit :
Thanks. Simon. I know you must be busier than a one armed wallpaper hanger with an itchy nose. 

Take care and thank you for what you do! 


On Sat, Nov 13, 2021 at 10:32 PM, Simon Brown



Not right now – working on my website, then some essential and very long-overdue infrastructure work.


ATM I’m getting v3.1 stable so I can get out of gentle panic mode 😊 .


Simon Brown, G4ELI


From: <> On Behalf Of George Stein - NJ3H via
Sent: 11 November 2021 23:37
Subject: [SDR-Radio] Shaded area under the Spectrum


Hello Simon,

I would like to see an option to shade the area under the spectrum as a solid color.  I think the clarity is better this way.  SDR Sharp has this capability and really looks nice, but I like using SDRC.

Thanks so much.

George, NJ3H
Redmond, Oregon USA

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