WebSDR Waterfall

This webSDR is operated by N8MDP, at e-mail: ars_n8mdp@windstream.net. More information about the WebSDR project can be found on http://www.websdr.org.

CHROME users: Beware that Chrome has a tendancy to block sound from Unsecure sites, like mine. I don't have https security as I am not willing to pay for it from my hosting service. Too expensive! However, if you click on the 'Not Secure' section to the left of the URL line and set the site settings to Sound > Allow, then reload the page. You will get sound.

Word of Thanks: I would like to thank Nick N4BUT and Joshua KA6NEW for helping me to get my site going with two RTL-SDRs and a Raspberry Pi 4. I especially want to thank Nick for sharing his source code with me so I could work with his interface and modify it for how I wanted to display my SDR.

Note: You need both Java and JavaScript enabled for this page to work properly. If you don't hear anything, probably Java is disabled or its version is too old (i.e., pre-1.4.2).

It seems you are using a mobile device; click here to switch to the mobile version of this site.
It seems Java is not installed or disabled on your computer. You need to install and/or enable it for this website to work properly.
Since Java version 7u51, Java needs to be enabled separately for each website; see http://websdr.org/java.html for instructions.
Your browser does not seem to support HTML5 WebAudio; please try a recent version of Firefox, Chrome, Opera or Safari; or switch to Java.



Bandwidth: ? kHz @ -6dB; ? kHz @ -60dB.
Allow keyboard:
j k ← →: freq down/up (+shift/ctrl/alt faster)
u l c a f: USB, LSB, CW, AM, FM
z Z: center/zoom waterfall
g: enter frequency

? dB; peak ? dB;
mute Squelch autonotch

Hardware (20m, 40m): RTL-SDR v3
Antenna: Buckmaster DX-OCF-HP Multiband Dipole
Original interface design : UB0AZG & SV1RVL
Author of the WebSDR software: PA3FWM
Designer of this interface: N4BUT
Modifications made by: N8MDP


Call of station that you hear:

Comments, if any:
Note: time, frequency, your name/call, and DXCC information are added automatically.
View the last 20 lines of the logbook, or the entire logbook (ctrl-click for new tab/window).

This WebSDR is currently being used by ? user(s) simultaneously:      compact view

This chatbox is intended to discuss the operation of the WebSDR.
The operators of this site disclaim any responsibility for text appearing in this chatbox.

Save Freq