Bookmarks

Learn CW Online, in your browser.

Here you will find some of the best online resources for Morse code.

Morse code messages transmitted from the Titanic via Marconi's radio before it sank.

This program teaches you to receive Morse code. It starts with a few letters and adds more when it sees that you are ready.

An accidental cross-time radio link connects father and son across 30 years.

The Radio Amateur is a short film about a blind man, Tage, who lives in a little village in the north of Sweden.

One night in New Mexico, in the late 1950s, a switchboard operator and radio DJ start hearing a strange signal over a radio frequency.

Real-time solar-terrestrial data: SFI, K-index, A-index, and band conditions. Also offers embeddable widgets for your own site.

Live HF propagation conditions with 7-day forecast, per-band analysis, and MUF data. Updates every 15 seconds.

RF attenuator conversion and resistor calculation tool for Pi, Tee, and bridged attenuators.

Collection of practical RF engineering tools and calculators for radio amateurs and experimenters.

Reference tables and explanations for dBm, power, voltage, and impedance conversions.

Turkish article about building RF measurement instruments and amateur radio test equipment.

Official manual and documentation for the Elecraft XG2 receiver test oscillator.

Turkish communication systems laboratory document covering amplitude modulation (AM) demodulators.

Detailed guide on designing and building narrow band-pass crystal ladder filters.

Technical article about measuring and characterizing crystal resonators and equivalent circuit parameters.

Finance, corporate news, Wall Street analysis and startup ecosystem coverage from an insider perspective.

Practitioner-written long-form essays on technology, product, AI and software engineering.

In-depth reporting on how technology reshapes culture, science, security and society.