12AX7 ECC83, le grand test.

@Mikka : non, même les AC coupled peuvent rencontrer le problème au démarrage si on applique la HT sur un tube froid. Tout le B+ se retrouve à la cathode puisqu'il n'y a pas de courant. Vk baisse ensuite jusqu'au régime de croisière quand le tube chauffe et se met à conduire.

Ca va être compliqué de se fournir en Sovtek / EHX / Tungsol et compagnie désormais ! (rire jaune)

Current Information - Update from March 11, 2022

Unfortunately, due to the war in Ukraine, we have to assume that the export of amplifier tubes from Russian production will come to a complete standstill in the near future. When and if the supply situation will ease again cannot be said at the moment.
In addition, there are still considerable delivery problems from other manufacturers, who have reached their production capacities due to the high demand. Here, too, it is currently impossible to say whether and when availability will return to normal.
Irrespective of these supply problems, we must also expect prices to continue to rise sharply for all products. Either through an increase in the price of raw materials such as oil or wood, or through rising transport costs. In the end, both factors will probably come together. For example, a price increase of 200 - 300, sometimes even up to 400 % could already be observed for wood, and this before the outbreak of war. Since many woods and wood products come from Russia, it should be safe in which direction the prices develop further.

We try to maintain the ability to deliver as good as possible and also to offer alternative products, especially for the tubes, but this becomes more and more difficult the longer the war hangings will last.
The prices themselves we can not keep stable, even by optimized purchasing or transport, this is impossible. But again, we will try to keep the increases as moderate as possible.

I also ask for your understanding that we can not answer any inquiries about delivery ridges or availability of individual products, and also will not give advice on tube assemblies at the moment. Currently you can't be choosy, you have to take what you get.

Thank you for your understanding,

Dirk

Salut.
Je viens de retuber mon marshall 2525c avec 3 12ax7 jj...mais je ne trouve pas le résultat probant.
J'aimerais retrouver le son de mes anciennes 12ax7 marshall.
Vu que marshall ne fabrique pas de lampe,elle viennent de quelle marque?

ben il aurait fallu que tu achètes des tubes testés

J'ai acheté beaucoup de 12AX7 JJ de base [/color][color=yellow]ou V1 chez Tubetown et toutes bonnes..