translate English to German: For much of the 20th century vacuum tube diodes were used in analog signal applications, and as rectifiers in power supplies. Today, tube diodes are only used in niche applications, such as rectifiers in tube guitar and hi-fi amplifiers, and specialized high-voltage equipment.
Dieses Modell entspricht der Shockley-Formel , wodurch diese Formel u.a. auch zur näherungsweisen Berechnung von Ventilen geeignet ist.