Valve has been busy with hardware projects over the last few years, from the Valve Index to the Steam Deck. Therefore, it comes as no surprise to find that the Bellevue, Washington-based company is ...

If you insist on using a valve radio and listening to medium-wave stations, you have a problem: the existing broadcasters have only a limited number of records. Here there’s only one remedy, which is ...

This lovely little number is the EF80 pentode thermionic valve, or vacuum tube, made by Mullard beginning in 1950. They were used in radio and radar applications, but most of them wound up in VHF ...