Ham Radio & ShackLink
Remote radio control, SDR and decoders for your station. Every signal in these videos comes from the server’s built-in Test Band, a synthetic 20 m band with real modulations, so nothing here was received off the air. About ShackLink →
5:09
A tour of ShackLink
Five minutes across the whole station: tuning by clicking the waterfall, CW filters that move the note and Multiband; the built-in decoders and the Band Skimmer; the 3D waterfall, themes and Station Slice; and the same station from a browser, the desktop client and a touch panel.
View app details →Operating
0:53
Tune by clicking the waterfall
Click a signal and the radio tunes to it. One tap on a memory tile recalls frequency and mode together.
1:06
Narrow a CW signal and move the pitch
Pick 1 kHz, 500 Hz or 250 Hz and the note stays centred. The filter edges are the pitch control.
0:57
AGC and noise reduction on weak SSB
A station 13 dB above the noise: AGC holds the level, noise reduction takes the hiss down, then an off/on A/B.
1:04
Multiband: one spectrum for every receiver
Every receiver on one surface, labelled with the band plan, your memories and decoded callsigns.
1:06
Touch mode: the station on a touch panel
Big keys for the dial, memories a page at a time, and FT8 on the DIGITAL page.
Decoders
1:06
Decode CW, RTTY and PSK31 live
Twelve decoders built in, and recalling a memory brings its decoder with it. RTTY finds its own baud rate and shift.
1:35
Olivia, Contestia and NAVTEX
Olivia 16/500 for the worst conditions, Contestia in the same decoder, and NAVTEX with error correction.
1:13
FT8 and FT4, no WSJT-X needed
FT8 on 14.074 MHz decoded inside ShackLink every 15 seconds, then FT4 in the same decoder.
1:35
Receive SSTV pictures
The mode is recognised from the VIS header and the picture arrives line by line, in colour.
1:39
Receive a weather fax chart
Radiofax on 14.102 MHz: the start tone opens a fresh chart, drawn at 120 lines a minute.
1:40
Band Skimmer: every mode at once
Every signal in a segment decoded together, callsigns collected with their country, then SSB voice transcribed.
Displays
0:50
3D waterfall: flat, terrain and split
One click turns the waterfall into terrain, and the split view joins the two at the same instant.
1:36
Themes, button finishes and palettes
Colour themes (light ones too), fifteen button finishes, and waterfall palettes picked by looking at them.
0:39
Rooms: a workspace for each job
Operate, Decode and Log, each room keeping the arrangement you gave it.
0:50
Station Slice: the always-zoomed view
A second SDR view that stays zoomed on the station you are listening to.
Remote clients
1:31
The web client: your station in a browser
Streamed audio, the live SDR waterfall with click-to-tune, memories, and FT8 decoded at the station.
1:06
The desktop client over the network
The station’s audio, the same faceplate and memories, decoder text, any receiver’s SDR view and the Lab.
Hardware
1:07
A wireless ShackLink client on an ESP32 rotary knob
A rotary knob that tunes the station over Wi-Fi.
Coming soon
ShackLink Server Setup Guide
Installing and configuring ShackLink Server for network radio control.
View app details →Mobile Client Demo
Control a radio from a phone or tablet using the Android and iOS client.
View app details →RF Bench Analyser
A spectrum analyser front panel for the instruments on your bench and for SDRs. Most were recorded on the built-in demo band or on simulated instruments, and four on real hardware, receive only: an RTL-SDR and a NanoVNA. Each card says which. About RF Bench Analyser →
5:07
A tour of RF Bench Analyser
Five minutes from the first sweep to the test report: the live demo band, markers and the 3-D views; an RTL-SDR on the FM band and a NanoVNA on an antenna; measurements and limit masks; the signal generator, transmitter and receiver tests; the results library and scripting in Python.
View app details →Getting started
1:17
Your first sweep, on the live demo band
No instrument needed. A drag zooms with a finer FFT rather than a magnified picture.
Demo band
1:39
Markers, peak search and the VFO
Markers and deltas, peak search, the counter, and a VFO that plays a CW beacon and an SSB voice.
Demo band
1:48
Traces: max hold, average, functions, snapshots
A ten-sweep average, a function trace, a frozen reference, and snapshots drawn over the live trace.
Demo band
1:49
Waterfall, 3-D terrain and phosphor
The waterfall pane’s views, palettes chosen from tiles, and the phosphor density picture.
Demo band
1:44
The zoom lens and the 3-D spectrogram
A slice magnified in a window of its own, then five seconds of sweeps you can orbit and click to read.
Demo band
1:45
Themes, panels and the command launcher
Dark and light themes, panels that float off and dock back, and every menu item as a tile.
Demo bandReal signals
1:32
The FM broadcast band on an RTL-SDR
88 to 108 MHz from a dongle that sees 2.4 MHz at a time, retuned segment by segment and joined into one frame.
Real hardware
2:19
Measuring FM deviation on an RTL-SDR
The modulation meter on local broadcast stations: peak and RMS deviation, carrier offset and tones.
Real hardware
2:24
A NanoVNA as a network analyser
S11 of a whip antenna: the Smith chart, VSWR, return loss and a summary of each amateur band.
Real hardware
1:55
A wideband survey of the FM band
Pass after pass into a heat map with a hit list, written as rtl_power’s CSV.
Real hardwareMeasurements
1:52
Channel power, OBW, ACPR and the live table
Level lines, a shaded channel, and a table that measures every sweep and raises an alarm.
Demo band
1:47
Limit masks: draw one, arm it, catch what breaks it
An upper limit drawn point by point, then a -43 dBc spurious template anchored on a carrier.
Demo band
1:47
A complex limit mask, built from the trace
A mask 3 dB above the live trace, point for point, and every keyed signal that rises over it logged.
Demo band
1:52
The power meter and frequency stability
dBm and watts against time, an input budget checked before keying, and the counter against time.
Simulated
1:20
Phase noise, a decade at a time
L(f) in dBc/Hz, the spot figures, integrated jitter, and a before-and-after reference curve.
Simulated
1:26
Two-tone intermodulation
The third- and fifth-order products of an SSB transmitter against PEP and against one tone, with a limit and an earlier run as reference.
Simulated
1:39
Gain compression of an amplifier
The generator steps the drive; the window finds the small-signal gain and the 1 dB and 3 dB points.
SimulatedThe bench
1:57
The signal generator, modulations and the carrier sweep
A carrier and a modulation chosen by keys, then a carrier swept from 88 to 108 MHz.
Simulated
1:40
Frequency response across two boxes
One instrument steps a carrier while another reads it, then the path is calibrated out.
Simulated
1:58
Testing a transmitter
Level and frequency against what was asked, harmonics, a spur search, linearity and a summary.
Simulated
1:48
Receiver sensitivity: 12 dB SINAD with a control
The level steps until SINAD crosses 12 dB, and no level is believed until the control collapses it.
Simulated
1:33
A transceiver suite, end to end
A plan of tests on a transceiver keyed over CAT, resumable, ending in a report.
Simulated
1:50
Level calibration of an SDR, by substitution
dBFS turned into dBm with a reference instrument, so the generator’s own error cancels.
Simulated
2:05
The instrument list and the bench
Seventeen drivers, the analyser and source roles, and the bench drawn as it is cabled.
SimulatedResults and automation
Voronoi DD
Interactive 2D and 3D Voronoi and power diagrams for points and line segments, on the desktop and in the browser. Every picture in the tour is the app’s own rendering. About Voronoi DD →
3:17
A tour of Voronoi DD
Three minutes from an empty canvas to 3D: clicking points and dragging segments into new cells, live moves, weights and grouped polylines, CVT; then section planes, adding seeds on the plane, explode and glass views, filters, eleven domain shapes from a gem to a chess pawn, and live animations.
View app details →Short videos
0:58
Voronoi DD in under a minute
The highlights: cells splitting as points are clicked in, a segment corridor, 3D slicing and explode, and a Voronoi vase turning into a printable lattice.
1:27
Voronoi DD 3D animation
The 3D animation presets in 4K on twelve datasets in eight shapes: a shattering gem, a vase relaxing to CVT, a slice sweep with its exact section, onion peel, build-up, Brownian motion and a weight pulse.
Spectra
A music player that turns your music into a light show, on PC, phone and TV. Everything in these videos is the app itself, reacting live to royalty-free music. About Spectra →
7:55
A tour of Spectra TV
Eight minutes with nothing but the remote: playing and browsing your music, favorites and the queue, 44 visualizations and four colour themes, per-visualization settings and the 3D camera, shader worlds and real molecules, internet radio, network shares, the sleep timer and demo mode.
View app details →Promos
0:53
The trailer
A countdown, the drop, then beat-cut visualizations: 40+ visualizers, 3D worlds, real molecules and shaders.
1:06
Features
What it does in a minute: plays your files, network shares, media servers and radio; 40+ visualizations, 3D worlds and real molecules; 66 shaders with a live editor; and every screen it runs on.
0:49
Neon
Electronic: split screens, bars laid over a shader tunnel, and words filled with live visuals.
1:04
Epic
Orchestral: slow push-ins through nebulae and 3D terrain, real molecules and shader worlds.
0:51
Chill
Lounge: one visualization in all four colour themes, custom-coloured LEDs and slow dissolves.
0:54
Rock
Rock: traffic-light LED meters, all 12 bar layouts landing one per beat, and words made of LEDs.
New on Windows: 10 visualizations
0:43
10 new visualizations
Neon cities you can fly through, five 3D spheres, a disco dancer and molecules, cut to the beat. Also as a Short.
2:06
A tour of the 10 new visualizations
Each new visualization in turn: what it shows, what in the music moves it, and how to steer its 3D camera. Stereo Spectrum Analyzer for Windows →
Intimate Connection & OffGrid Connect
Private mood sharing, status updates and chat between phones on the same Wi-Fi, with no servers, no accounts and end-to-end encryption. Each walkthrough follows two phones from first launch to settings. Intimate Connection → OffGrid Connect →
9:48
Intimate Connection: full walkthrough
Two phones, start to finish: first launch with no account, pairing over Wi-Fi, sharing a mood and your partner’s reply, private chat with quick responses, secret moods and a Mood Match, the daily questionnaire, insights, availability and the privacy settings.
View app details →
7:08
OffGrid Connect: full walkthrough
Two devices with no internet: first launch, connecting over the local network, sharing a status update, requests, encrypted chat with quick responses, a Status Match, and the availability and privacy settings.
View app details →DitDots PDF
A touch-friendly PDF workbench for Windows: combine records, redact for real, stamp Bates numbers, make scans searchable and repair damaged files, all on your PC. Every person, organisation and number in these videos is fictional. About DitDots PDF →
1:27
A walkthrough of DitDots PDF
A fictional personal-injury case: three PDFs open and the damaged one is repaired, pages from each are combined and one is rotated, the SSN and date of birth are redacted by hand and then found on every page, Bates numbers go on, the preview shows the covered text is gone, and the file is saved searchable. Then a watched folder and the dark theme.
View app details →Short videos
1:00
DitDots PDF in a minute
The same case at trailer pace: combine, redact by hand and by search, Bates numbers, the preview, a searchable save, a watched folder and the dark theme.