TubeS neufS, problème de bourdonnements

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oldamp
  • oldamp
  • Vintage Méga utilisateur
  • #15
  • Publié par
    oldamp
    le 27 Nov 2020, 09:45
Oui, la STR a l'air pas mal, mais je ne connais pas les EL84 TAD... Sur mon AC30 69 j'ai mis un quad de 7189A NOS, mais c'est pas le même prix !
High-Hopes
Merci oldamp

Ils ont sortie une série str black-plate, ça apporte quoi ?
oldamp
  • oldamp
  • Vintage Méga utilisateur
  • #17
  • Publié par
    oldamp
    le 28 Nov 2020, 10:25
Théoriquement ça dissipe mieux la chaleur...
High-Hopes
oldamp a écrit :
Théoriquement ça dissipe mieux la chaleur...


Meilleur dissipation de chaleur pour un Vox ac30, ça devrait le faire

Je vais voir si je peux echanger avec ces STR Backplate merci
NUFAN
  • NUFAN
  • Vintage Ultra utilisateur
  • #19
  • Publié par
    NUFAN
    le 28 Nov 2020, 13:48
TAD Premium Tubes

TAD does all TAD Tube quality control processing in-house under strict control of our technical staff. Our techs which are also musicians and guitar players, developed and constructed our custom tube testing systems and aging rigs to run tubes in real amplifier circuits and operation conditions.

For TAD, real tube quality control is way more than just a simple test. Before a TAD Tube gets accepted at all we perform extensive sample evaluation testing for consistency, power test, shock resistance test, soak test (long term operation at full power) and of course a musical test in known amplifiers to learn about its sound character in different styles. The main tests are made after a propper pre-aging to stabilize the cathode emission. While most tube test equipment does work at 250V as a maximum we built our test rig to operate at voltages of 360 to 600V depending on the tubes being tested. Every TAD Tube is tested by our qualified staff. Each pentode is inspected,tapped while operating and listened for noise floor, hum and odd noise.

Finally measured for a set of parameters and matched by Ia (PC) and Gm (TC). We do test batches of 400 to 500 pieces per run to allow tightest tolerances of typically 0.5mA for PC. All TAD Tubes and boxes get labeled with the PC and TC test results and a unique serial number to identify every tube we’ve ever tested. We permanently verify and monitor selected and matched TAD Tubes by using them every day in our own amp service department and in the TAD Amp Kits we assemble. This is the most complete quality control system we can imagine.

All done in-house at TAD in Germany
...mais sur une pancarte juste à côté d'une table, c'est marqué "interdit les punks et les arabes"...
comas
  • comas
  • Custom Total utilisateur
  • #20
  • Publié par
    comas
    le 28 Nov 2020, 15:34
NUFAN a écrit :
TAD Premium Tubes

TAD does all TAD Tube quality control processing in-house under strict control of our technical staff. Our techs which are also musicians and guitar players, developed and constructed our custom tube testing systems and aging rigs to run tubes in real amplifier circuits and operation conditions.

For TAD, real tube quality control is way more than just a simple test. Before a TAD Tube gets accepted at all we perform extensive sample evaluation testing for consistency, power test, shock resistance test, soak test (long term operation at full power) and of course a musical test in known amplifiers to learn about its sound character in different styles. The main tests are made after a propper pre-aging to stabilize the cathode emission. While most tube test equipment does work at 250V as a maximum we built our test rig to operate at voltages of 360 to 600V depending on the tubes being tested. Every TAD Tube is tested by our qualified staff. Each pentode is inspected,tapped while operating and listened for noise floor, hum and odd noise.

Finally measured for a set of parameters and matched by Ia (PC) and Gm (TC). We do test batches of 400 to 500 pieces per run to allow tightest tolerances of typically 0.5mA for PC. All TAD Tubes and boxes get labeled with the PC and TC test results and a unique serial number to identify every tube we’ve ever tested. We permanently verify and monitor selected and matched TAD Tubes by using them every day in our own amp service department and in the TAD Amp Kits we assemble. This is the most complete quality control system we can imagine.

All done in-house at TAD in Germany


Et bha, tout ca pour que 25% des ECC83 TAD (j'ai benché quasi tous les modèles) soient hors des clous (< 0.6mV la ou on attend 1.2)

Les tubes de puissances sont eux en général nickels, mais c'est le cas de tous les fabriquants actuels quasiment, JJ et EHX font aussi bien.

Bref, je reste convaincu qu'entre ce qui est dis, collé sur les boites, et la réalité ...
Soyez Réaliste, demandez l'impossible ...

Des tubes à tester ? Je peux faire ça pour vous !

https://www.guitariste.com/for(...).html
oldamp
  • oldamp
  • Vintage Méga utilisateur
  • #21
  • Publié par
    oldamp
    le 28 Nov 2020, 18:53
Allez, un bon geste, laissez-lui le dernier mot
corto30

faut esperer qu'on maitrise un jour cette technologie vieille de 2 siècles



insert coin
Nutrisco et Extinguo
High-Hopes
Un petit retour de TAD. (Édit)

Bon et bien remplacement des tubes sans retours des anciens. Franchement TAD ne rechigne pas à renvoyer.

Simplement ils voulaient s’assurer (quand ils m’ont demandé si il y avait bien le label sur tous les tubes) que j’avais bien reçu des tubes testés.

Voilà donc DU tout bon chez TAD

MERCI À TOUS POUR VOTRE AIDE

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