Feliks Audio is one of the few boutique brands from Poland making serious noise in the Head-Fi scene. They specialize in ...

A novel planar slow wave structure (SWS) for traveling wave tube (TWT) is proposed. The major advantage of the planar architecture is its easy realization with respect to the typical 3-D SWSs. The ...

The Dynaco ST-70 is one of the most popular tube amplifiers ever. First released in 1959, it's still sought after by hi-fi enthusiasts today.

An accurate nonlinear model is necessary to optimize the tradeoff between efficiency and linearity in power amplifiers. Gain compression (AM/AM) and amplitude-phase (AM/PM) distortion are the two ...