hflogs.com

Boston 38L is a private listening post for channel 38 L-side CB traffic. Recordings are captured automatically when the channel is active, then published here for a small group of operators to browse and replay.

Clips are grouped by day, week, month, or hour. You can play them inline with waveform thumbnails, filter by time of day or minimum length, star favourites, and leave comments on individual clips. A background Whisper transcriber turns speech into searchable text — search matches words across filenames and transcripts, jumps you to the matching moment, and highlights hits on the clip page.

Extras include trim-and-export for highlights, per-user themes, and usage stats. Think of it as a rolling archive and research tool for one busy CB channel, not a public feed.

UDXF Logs is a searchable database of utility and HF reception reports compiled from the Utility DXers Forum (UDXF) community, covering roughly 2006 through 2026. The underlying data is decades of semi-structured log submissions: frequencies in kHz, station IDs, modes, free-text descriptions, UTC dates and times, and contributor call signs.

Search by keyword, frequency, station, mode, date range, or contributor. Full-text search runs across descriptions and notes; results can be sorted, exported, and drilled into station summary pages. A stats dashboard shows band activity, top stations and loggers, source-file coverage, and data-quality notes.

Source logs are © UDXF and are presented here as a research index for licensed listeners and DXers already familiar with the group’s conventions.

WSPR Globe plots Weak Signal Propagation Reporter (WSPR) spots on an interactive 3D Earth. Drag to rotate, scroll to zoom, and click an arc to inspect a path — who heard whom, on what band, and at what signal-to-noise ratio.

A side panel tracks live solar and geomagnetic indices (SFI, sunspot number, K and A indices, Bz) alongside analytics: total spots, unique paths, furthest contact, busiest band, and SNR summaries. Charts break down distance distribution and band activity over time.

It’s a visual way to see how HF propagation is behaving right now and where openings are forming, without digging through raw spot lists.

ConDX (hosted as webcondx) is an interactive educational tool for HF radio wave propagation through the ionosphere. It walks through the physics — Chapman-layer electron density, refractive bending, absorption in the D-layer, and how foF2 and launch angle control skip distance — then lets you experiment with sliders instead of just reading about it.

The 1D model shows vertical profiles of electron density and plasma frequency, then traces ray paths and signal loss across HF bands for a chosen elevation angle. The 2D model adds horizontal ionospheric gradients (day/night terminators, tilted F-layer) and visualizes off-great-circle bending and azimuth deflection.

Useful when you want to understand why a band is open or dead, how gray-line paths work, or how changing foF2 and take-off angle affects where your signal lands.

CWSigFind is a live CW spotting dashboard. It streams recent CW spots into a sortable table: UTC time, spotted station, frequency, band, mode, country, activity notes, spotter, and comments — the usual DX-cluster fields, filtered down to CW.

A propagation panel (toggle hide/show) puts current conditions alongside the spot feed so you can see who’s active on the key and whether the bands look worth a listen. Handy for finding rare DX, checking if a frequency is already occupied, or watching CW activity build during an opening.

Pair it with ConDX or WSPR Globe when you want both live activity and a feel for why the band might be open.