Neuer Artikel: Röhren-Verzerrer

Schon 1977 hatte Ampeg in einigen Röhren-Gitarren-Amps einen Röhren-Verzerrer eingebaut. In diesem Artikel analysiert Bernd Meiser diese Verzerrerschaltung und prüft, ob sie auch heutzutage noch brauchbar erscheint.

Neuer Artikel: Die Elektrik der Fender Stratocaster, Teil 1

Die 1954 eingeführte Fender Stratocaster E-Gitarre wurde über die Jahrzehnte bis in die heutige Zeit hinein fast unverändert gebaut und ist schlicht die meist verkaufte E-Gitarre weltweit. Das ist ein guter Grund, sich die elektrische Ausstattung dieser zeitlosen Gitarre näher anzusehen. In diesem ersten Teil geht es um das Zentrale Bauteil der Elektrik: Den Tonabnehmer. Behandelt wird der Aufbau, die elektrischen Eigenschaften und natürlich der Klang.

Die Elektrik der Fender Stratocaster, Teil 1

Dissertation: Modellierung analoger Gitarrenverstärker mit digitaler Signalverarbeitung

Wie entwirft man einen Gitarren-Modelling-Verstärker? Die Antwort darauf findet sich in der Dissertation von Kristjan Dempwolf, die er uns dankenswerterweise zur Verfügung gestellt hat.

Schwerpunkt darin ist die Erarbeitung eines allgemeinen Ansatzes, mit dem die Modellierung beliebiger, auch nichtlinearer Schaltungen auf systematischem Wege möglich ist. Hierzu wird das Konzept des Zustandsraums aufgegriffen. Darüber hinaus ergibt sich die Notwendigkeit, ein Triodenmodell mit realistischer Nachbildung des Gitterstroms zu entwickeln.

Modellierung analoger Gitarrenverstärker mit digitaler Signalverarbeitung

New scientific article on whether it is purposeful to „Play-in“ musical instruments

There is an ongoing controversy about whether it is purposeful to "play-in" musical instruments. In other words: do much played instruments sound different (or – preferably – even better) compared to instruments that have been played little? Dr. Gregor Weldert addresses this interesting topic in an extensive overview-article and has kindly agreed to us publishing it here on the GITEC-website:

Sound enhancement of musical instruments by "Playing them in": fact or fiction?

The translation of Chapter 10 of „Physics of the Electric Guitar“ continues

Another big chunk of the translation of the (rather extensive) Chapter 10 of "Physics of the Electric Guitar" has been completed: most everything you ever wanted to know about the first sections of a (tube) guitar amp is available: preamp, tone-controls, intermediate amp (incl. the infamous cathode-follower discussed in detail), phase-splitter/driver, associated distortion and non-linearity, noise, hum ... all there!

Go and see:

This makes for Chapters 10.1. - 10.4 .... and Chapter 10.5 (on the power stage) is already in the works!

Translation of Chapter 4 of „Physics of the Electric Guitar“ complete!

Wolfgang Hönlein and Andrew Graham have completed the translation of Chapter 4 of "Physics of the Electric Guitar" - it discusses magnetism, i.e. one of the foundations of our instruments. No magnet – no magnetic pickup – no electric guitar as we know it!

Special thanks got to Andrew who provided some serious help and support to Wolfgang, checking the language and proofreading the translation.

Check out the result here (scroll down until you hit chapter 4!).

New scientific article: The 1967 Fender Solid-State Twin Reverb – the Edsel of amps?

Transistor-amps do not enjoy a particularly good reputation among guitar players. Presumably, a main contributor to this (certainly not always deserved) image was the Solid-State amplifier series unveiled by Fender in 1967. What went wrong with these amps? Is the catastrophic image they "enjoy" justified? Are they really that bad? These questions are not easy to answer – the amps are (understandably) quite rare today and very few people can actually play them and check them out.

At GITEC, we could get hold of a Solid-State Twin Reverb and investigate it inside and out - and, last not least, play it. The result is a 3-part article:

Revisiting the amp that gave "Solid-State" a bad name: the Fender Solid-State Twin Reverb:

- Part 1: Introduction, appearance, build and serviceability

- Part 2: Circuit design

- Part 3: Plugging in: playability & sound

Scientific article on distortion boxes now on-line!

At last, we found some capacity to translate another scientific article. Thanks to the initiative of GITEC member Ralf Jamer, the investigation of distortion- and overdrive-boxes is now available in English language. Particular attention is dedicated to the good old Range-Master booster, and to the legendary Tube-Screamer overdrive. Given that only a few days ago Ibanez brought out a “Nu Tube-Screamer” at the 2018 NAMM-show, it is just the right time to look into what made its legendary ancestor so special. Check out Overdrive, Fuzz & Distortion: investigating Range-Master, Tube-Screamer, et al. !