this is a read only website
and under construction
Some simply buy, for others this implies self sufficiency, but we will all get there!
Motivation comes from having experienced very good audio; once heard it cannot be unheard, from then on, when hearing poor sound the new standards that have been set will not step aside.
Gratis workshop
Amplifier technology by Bert van der Kerk
The amplifier website from Bert van der Kerk relates his voyage through the Williamson way of DIY, which during a period in the fifties of previous century, was a hole in the wall for early adopters.
It is proof that, if you own a pair of the extra ordinary output transformers, and if you know how to operate in the mortally dangerous world of high voltage, it still is possible in our times to relive the spine chilling experience of good sound.
Chapter 6. Project with Unitran Transformers
Chapter 7. First BvdK transformer amp, case design by Pascal Jansen
Chapter 8. The UltraFine Output Transformer Project
Chapter 9. The Power Supply, The Time Delay Power Switch
Chapter 10. Putting into Operation, Adjusting Bias
Chapter 11. Applying Negative Feedback, Adjusting C10, R26P
Reproduction analogique, ERA heritage from France
Le site ERA plonge dans le passé de cette marque à l’esthétique des années 60/70, tentant de retracer une partie de son histoire, d’évaluer ses mérites qualitatifs et de documenter sa mécanique. En plus, il y a la l’histoire personnelle: cette base magnifique qu’est la platine ERA 444 pour toute expérimentation électromécanique m’a mené, en passant par les tentatives de resoudre plusieurs problémes, a la conception du bras au palier a multiples pointes seches.
Chapitre 12. La génération Mk3 jusqu’à 6066, soupçons
Chapitre 13. La modularité et ses pièces
Chapitre 14 mise en garde
Chapitre 15 La poulie 33/45 tours
Chapitre 16 les contacts et le cablage
Chapitre 17 La geométrie d’un bras 9 pouces
Chapitre 18 les bras avec palier à pointes sèches
Lautsprecher
Die Lautsprecher Webpage versucht klar zu machen wie es moglich ist um, ohne viel Geld, das Besitz zu erwerfen von das immer teuersten Teil eines Hifi Ketten.
Die monatliche spendiering um Hobby hifi und Klang&Ton zu lesen, gesamt die Preis ein Paar guten lautspecher erreichend, hat bei mir die Wissenschaft aufgebaut um die, fur mich richtigen, Wahl zu machen:
Kapitel 19. Einzellautsprecher System mit Tieftonlabyrinth.
Kapitel 20. Einpunktwiedergabe
Kapitel 21. Lautsprecher aus Wellpappe
Met beide benen op de grond blijven staan
Het moeilijkste als laatste: welke keuzen te maken, om binnen de eigen mogelijkheden, niet per se het maximaal mogelijke, maar in ieder geval een bevredigend resultaat te bereiken.
Het vergaren van informatie is hierbij net zo belangrijk als het bereiken van de mentale staat nodig voor het ontwijken van dwaalwegen. Het doel is uiteindelijk naar muziek luisteren.
Hoofdstuk 22. de luisterruimte
This is a mutilingual website written in the language of primary interest for each subject, if the page is auto translated, please be aware of the inaccuracies and possible contradictions of AI technology: double check all that is crucial, or seems improbable!
Wherever possible bold affirmations will be expressed as prudent hypothetical thought, all remaining blatancy has to be considered as pending to be re-written.
Disclaimer Tube amplifiers operate with high DC voltage, mortal danger is present within millimeters, this could be a good reason to stay clear if you are inexperienced.
Even disconnected capacitors can take very long time to fully discharge.
This also applies to the ERA turntables, allways unplug it from the AC mains : the power/speed commutator switch has open contacts that can easily, unvoluntarily, be touched. There is a high risc of copper lugs contacting the steel hull body, during the particularly difficult manipulation of opening the case. Unplug from the AC mains!