The triode vacuum tube might be nearly obsolete today, but it was a technology critical to making radio practical over 100 years ago. [Kathy] has put together a video that tells the story and explains ...

The Decware SuperZen Triode Model SE84UFO2 is a handmade 2.3 watts/channel tube amplifier that hits much harder than its power rating would suggest. Over the past 23 years, I have had the opportunity ...

We see quite a bit of work where people decapsulate ICs or other solid state devices to expose their inner workings. But how about hollow state? [Tomtektest] had a dual triode that has lost its vacuum ...

Four-pin plastic base with tipped T-shaped envelope. Donor card reads: "Triode made by Myers Radio Tube Corporation of Cleveland, Ohio. Identical with [catalog numbers 324365 and 324366] except that ...

Please note: Due to publication error, we will be rerunning a corrected version of this Design Idea in our June 12th issue. We apologize for the error. Control grid ...

The circuit was designed to create a line preamplifier by acquiring the use of double triode tubes. The circuit comprises of three parts, the main preamplifier circuit with tubes, the input selector ...

Linear, small-signal AC models can be useful in the analysis and design of vacuum-tube-based circuits. Under large-signal conditions, nonlinear models are typically required. Almost 120 years ago, ...

Fezz Audio is not some boutique tube brand trying to sell Americans a misty-eyed postcard from Eastern Europe. Designed and manufactured in Poland, the new Integrated Amplifier arrives in the U.S.