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Extended Single SidebandESSB
The audio chain, transmit processing, and 6 kHz wideband voice behind the N6MUD audio.
Amateur radio station / N6MUD
Amateur Radio
redefined.
Amateur Radio • ESSB • SDR
Exploring wideband HF audio, software-defined radio, antennas, and portable operation from San Diego, California.
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Live & recorded
↗◉Watch on YouTube
ESSB ragchews, SDR demonstrations, and station projects.
Audio archive
↗WXListen on Spotify
Station conversations and ESSB discussions on demand.
Live backyard conditions
↗View Weather Station
Temperature, wind, rainfall, pressure, and forecast data from the San Diego QTH.
Featured / Station profile
Built for the audio
A software-defined HF station focused on clean, articulate, wideband transmit audio.
PRIMARY SDRApache Labs G2
AUDIORE320 · SSL2 · DEQ2496
RF POWERRF-Kit RF2K-S
ANTENNA40m ladder-line loop
When Craig isn’t working as a remote software engineer, the station becomes a test bench for SDR technology, audio processing, antennas, and portable operation.
View full QRZ profile ↗Explore / Core topics
Inside N6MUD
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The Radio RoomStation
SDR hardware, RF power, metering, and the 40-meter horizontal loop that brings it together.
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Notes From The BenchArticles
Technical observations, equipment notes, and practical experiments from the station and field.
Latest stream / Audio report
ESSB recording by KJ7E
Hear the complete N6MUD wideband audio chain: Apache Labs G2, RE320, Behringer DEQ2496, Thetis, SSL2, LP-100, and RF2K-S.
Watch recording ↗Mobile shack / Walkthrough
1999 Toyota Land Cruiser
Tour the N6MUD Mobile Shack on Wheels and its amateur radio installation.
Open on YouTube ↗QRZ logbook / N6MUD
Have we worked?
If the logbook does not load in your browser, view it directly on QRZ.
Station archive / QRZ gallery
Around the station
The ESSB Rabbit Hole Begins
An earlier version of the N6MUD station at the beginning of the wideband audio journey.
40m Loop Feed Point
The ladder-line feed point for the primary 40-meter horizontal loop antenna.
Loop Lightning Arrestor
Lightning protection installed for the ladder-line-fed 40-meter loop.
Mobile Shack on Wheels
The amateur radio installation in Craig’s 1999 Toyota Land Cruiser.
Fiesta Island Mobile Setup
The Land Cruiser and mobile antenna configured for HF operation at Fiesta Island.
Mountain-Top Mobile
The mobile HF station operating from elevation in the 1999 Land Cruiser.
Cabrillo Portable
Icom IC-705 and Wolf River Coil at Cabrillo National Monument, San Diego.
N6MUD QSL Card
The N6MUD QSL card. Logo designed by Jeff, K5BLS.
Baron & Amaya
Faithful companions during operating, station projects, and livestream preparation. Forever part of the N6MUD shack.
The N6MUD Shack
Illustrated shack artwork used by the N6MUD QRZ profile.