World Tube Audio (Popularity: )

Extensive list of links and topics on vacuum tube audio applications, projects, theory, and design. ...
Category: Science\Technology\Electronics\Audio and Video

World Tube Audio Portal (Popularity: )

Audio tube related link list, forums and newsgroups, tube amplifier collection and tweaking. Audio amplifiers ...
Category: Science\Technology\Electronics\Reference

Shortwave Transmitter Tubes (Popularity: )

A service from TDP with links to and information about the manufacturers, rebuilders and distributors/suppliers ...
Category: Science\Technology\Electronics\Reference

The Tubes and Valves Online Database (Popularity: )

European electron tube charts with characteristic data, basing diagrams, and application info, includes Russian types.
Category: Science\Technology\Electronics\Reference