Jump to content

Search the Community

Showing results for tags 'bias'.



More search options

  • Search By Tags

    Type tags separated by commas.
  • Search By Author

Content Type


Forums

  • Community Support
    • Multi-Effects Units
    • Variax Instruments
    • Amplifiers
    • Computer Based Recording
    • Live Sound
    • Pedals/Controllers
    • Dream Rig - Line 6 Product Integration
  • General Discussion
    • Share your Settings
    • Line 6 Lounge

Categories

  • General FAQ
  • Tutorial Videos
  • Effects/Controllers
    • HELIX/HX
    • Firehawk
    • FBV Controllers (MKI / MKII/ 3)
    • M5 / M9 / M13
    • JM4 Looper
    • Stompbox Modelers / ToneCore
    • ToneCore Development Kit
  • Recording
    • Helix Native
    • Echo Farm/Amp Farm
    • POD Farm / POD Studio / TonePort
    • Computer Audio Set Up and Troubleshooting
    • Riffworks Line 6 / Standard Edition
  • POD
    • POD HD Family
    • POD HD500/HD500X
    • POD HD300/400
    • POD X3 Family
    • POD 2.0 / PODxt Family / Pocket POD / FloorPODs
  • AMPLIFi Series Products
    • AMPLIFi 30/75/150/TT
    • AMPLIFi FX100
    • Videos
    • Tone Creation
  • Amplifiers
    • Spider V
    • Powercab
    • Firehawk 1500
    • DT50/DT25
    • Spider IV/Spider Online
    • Spider Valve
    • Spider Jam
    • Vetta
  • Live Sound
    • Relay/XD-V Digital Wireless
    • StageScape M20d Mixer
    • StageSource Speaker
  • Guitars
    • JTV / Shuriken / Variax Standard / Workbench HD
    • 1st Gen Variax Guitars / Bass / Workbench
  • Mobile Products
    • Sonic Port devices / Mobile In
    • Mobile Keys
    • MIDI Mobilizer
    • Mobile POD app
  • Dream Rig
  • Legacy Products
    • Amps
    • POD
    • Effects and Controllers
    • GearBox
    • Line 6 X2 Digital Wireless

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Joined

  • Start

    End


Group


AIM


MSN


Website URL


ICQ


Yahoo


Jabber


Skype


Location


Interests


Registered Products

Found 7 results

  1. jamesnlcc1

    Bias DT-25 amp

    Problem: While playing recently, my DT-25 suddenly dropped volume significantly and had a slight burning smell. I figured it was a tube(s) going out, so I bought some new ones and replaced them, but when I went to bias them, they were super low! Instead of the 25 (+/-3), they were around 7-8. I turned the bias, but then the weirdest thing happened - any turn up would start an unstoppable climb to 40-50, then it would suddenly kick down to 14 or less. It would stay that way until I turned the bias up again, and then the same thing every time. I checked the fuse, but it seems intact. Since power was going to the tubes, I figure it can't be that anyway. I may be wrong, but I suspected it may be kicking into Low-Volume mode as a safety feature. Any idea what's going on? How do I fix this?
  2. I don't want to waffle, so here is what I know: In ABCD mode, bank 1 is controlled via MIDI PC 00-03, bank 2 is 04-07, etc. Bias Head channels are controlled with PC signals 00-24 (user-defined, 1 per preset), supposedly on channel 1 When I switch between rhythm, clean, lead, and breakdown patches in my POD, I want there to be a corresponding amp change in my Bias head. Is this possible? I don't mind using the FS switch above the ABCD switch to change the amp separately, but ideally, I want them on the same switch. Is this possible?
  3. Does anyone know if Line 6 is considering designing a new version of Pod Farm or something like it that will be better or comparable to BIAS FX, Amplitube 4, Revalver 4, etc, or are they just expecting everyone who wants something better to buy a Helix? If there's any info on this, I'd really like to know before I purchase something else.
  4. Hey everyone. So this is my first tube amp, and it was working great so far. However, Yesterday during band practise, after it had been on and working perfectly for two hours, the volume suddenly dropped. When I checked the amp to see what was going on, I noticed that one of the tubes (the one on the left) was way hotter than the others. when I turned down the volume, where was a small lightning inside the tube, and then no sound. From what I've gathered from the internet, the tubes weren't paired or biased properly. When the amp is on, the other tubes light up normally. Anyway, when I bought the amp, the people at the store had only two tubes installed (the two in the center), to cut the output down and make it playable in the store. I wanted to know if there is any specific manipulation to do in order to do that. (I have a gig in 4 days and I probably won't have neither time nor money enough to have the tubes changed and the amp biased before then).
  5. Hi there I´d like to know what is the best or recomended bias setting in millivolts in a Spider Valve mkII 212 with 6L6GC new replacement tubes? before to leave my amp with Line6 or amp tech in my country (Mexico) I would like to be well informed what they are going to do. Many thanks!
  6. gatacca

    Biasing The Dt50 212 Combo

    Hey Guys, I've been searching high and low for a proper step by step,instructional kinda video/manual, for biasing the tube power section for the Line 6 DT50, but to no avail. I think it's high time, the forum have something like this in place so we can do the maintenance ourselves. Last i check, it cost nearly the price of a single tube to send it to the amp tech for biasing... :-( Hope any guru out there can help? =)
  7. Line6Tony

    DT50/DT25: Terminology

    Zur deutschen Version. La version française. DT50/DT25 Terminology FAQ Headroom: how much signal “room” you have before encountering distortion, particularly saturation. If you have more headroom, the amp will feel like it responds to your playing subtleties better and you’ll have more dynamic range for expressive playing. With less headroom, you get into serious distortion without playing as hard. Topology: the layout of a “feedback topology” of the amp circuit referring to the voicing of the global negative feedback of the DT50. Changing circuits will change the voicing of the amplifier. Class A: an amp design where current is flowing through the tubes constantly. Headroom is deceased, so tone becomes distorted sooner. Class AB: an amp design where a pair of tubes work together by “trading” duties (one is conducting current while the other is in cutoff). Sometimes the term “push-pull” operation is used to describe this mode. Provides greater headroom and tone remains clearer as a result. Bias: the voltage value between the control grid (grid #1) and the cathode, which dictates the power tube’s behavior in terms of distortion cutoff/saturation. There are two types of biasing methods: fixed-bias and cathode-bias (sometimes called self-biasing or auto-biasing). The DT50 operates in fixed-bias when in Class AB. It switches to cathode-bias when in Class A. Pentode: the power output tube is a 5-electrode object (cathode, control grid, screen grid, suppressor grid and anode/plate). In the DT50, when you select “Pentode” mode, you’re operating the EL34’s as pentode tubes. Triode: a mode of operation where the power tube has 3 active elements (cathode, control grid and the anode/plate). Setting the front panel control switch of the DT50 to “Triode” alters the behavior of the EL34’s to act more like a triode, which reduces the power output and affects the high end as well. Negative Feedback Loop (NFL): a certain amount of the amplifier’s output is fed back into the amp to reduce distortion and increase headroom. A higher amount of NFL results in a tighter response overall, which some guitarists may be seeking in their tone. A lesser amount of NFL can make the amp feel more “wild” and “unruly”, which can be also desirable to many guitarists. It depends on what you’re after and the context of what you’re after, musically-speaking. Tonestack: the EQ-region inside of an amp where the Bass, Mid and Treble controls live. Sag: the response of the amp to what is being played on the electric guitar, usually heard at the beginning of playing a note or chord that follows a rest. Sag will cause the amp to get a bit quieter, while also causing more distortion. DT50/DT25 FAQ Headroom: Der Headroom beschreibt den maximalen Spielraum, den Sie haben bevor es im Verstärker zu Verzerrung und Übersteuerung kommt. Mehr Headroom bedeutet, dass der Verstärker einen größeren dynamischen Bereich abdeckt auch während ausdrucksstarkem Spielen. Weniger Headroom wiederum bedeutet, dass es früher und öfter zu Verzerrungen kommen wird ohne hart zu spielen. Topology: Das Layout der Schaltung des Verstärkers. Die Änderung dieses Layouts wird den Klang des Verstärkers verändern. Class A: Bei diesem Layout fließt Strom kontinuierlich durch die Röhren. Headroom ist verringert und Verzerrungen treten früher auf. Class AB: Bei diesem Modell arbeiten beide Röhren zusammen. „Push-Pull“ wird hier oft im Englischen als Beschreibung verwendet. Das Resultat ist ein vergrößerter Headroom sowie klarerer Ton. Bias: Die Anzahl Volt zwischen Steuergitter und Katode. Bias steuert das Verhalten des Verstärkers. Es gibt zwei Methoden für Bias: Eine fixierte Ausrichtung (fixed bias) und die Katodenausrichtung (cathode bias) (auch automatische Ausrichtung genannt). Der DT50 ist im fixierte Ausrichtung Modus in Class AB und wechselt in den automatischen in Class A. Pentode: Die Röhre ist ein 5-Elektroden Objekt (Katode, Steuergitter, Bremsgitter, Schirmgitter und Anode). Im DT50 schalten die EL34 Röhren sich in den Pentode Modus wenn Sie „Pentode“ auswählen. Triode: In diesem Modus hat die Röhre nur 3 akive Elemente (Katode, Steuergitter und Anode). Wenn Sie das Gerät auf „Triode“ eisntellen wird die EL34 mehr wie eine Triode verhalten. Sie erhalten weniger Output und die Höhen werden auch beeinflusst. Negative Feedback Loop (NFL): Ein Teil des Outputs eines Verstärkers wird wieder zurück in den Verstärker gespeist um Verzerrung zu vermindern und den Headroom auszudehnen. Mehr NFL bedeutet eine bessere Reaktion und weniger NFL resultiert in einem wilden und unbändigem Ton. Es kommt aber darauf an, was Sie persönlich mögen. Tonestack: Der Teil des EQs in dem sich die Eisntellungen für Bass, Mitten und Höhen befinden. Sag: Die Reaktion des Verstärkers auf das was Sie auf einer elektrischen Gitarre spielen. Sag kann man meist am Anfang einer Note oder eines Akkordes hören. Der Verstärker wird ein wenig leiser und verursacht mehr Verzerrung. DT50/DT25 FAQ Headroom: Si un ampli a beaucoup de Headroom, ca veut dire que cet ampli garde un son clair avant de rencontrer de la distorsion et une saturation sonore. Jouer l’ampli se sent comme vous avez beaucoup plus de gamme dynamique. Si vous jouez sur un ampli avec moins de headroom, vous obtenez des distorsions graves sans jouer aussi fort. Topology: La disposition du circuit dans l’ampli. Changer cette disposition change le son de l’ampli. Class A: Une topologie où le courant circule constamment à travers les lampes. Moins de headroom = distortion plus tot. Class AB: Deux tubes coopèrent. Plus de headroom = le son garde la clarté plus longtemps. Bias: La tension entre grille de commande et cathode. Le bias configure la saturation de la lampe. Il y en a deux modes de bias : bias fixé et bias à cathode. Le DT50 est en mode bias fixé en Class AB et change à bias à cathode en mode Class A. Pentode: Le tube de sortie est un objet avec 5 électrodes: Cathode, grille de commande, grill écran, grille d’arrêt et anode. Sur le DT50 si vous sélectez « Pentode » les tubes EL34 sont en mode penthode. Triode: Le tube de sortie a trois éléments: Cathode, grille de commande et anode. Si vous mettez le DT50 en mode Triode, les EL34 agirent plus comme des Triodes. Puissance de sortie réduite et Triode affecte les sons de haute. Negative Feedback Loop (NFL): Une certaine quantité de la sortie du ampli est réintroduit dans l’ampli pour réduire la distorsion et pour ajouter du headroom. Plus de NFL se traduit par une réponse meilleure et moins de NFL vous fournis on ton sauvage et incontrôlé. Le NFL dépends à vos préférences. Tonestack: La région de l’égaliseur dans l’ampli. Les contrôles Basse, Mi et Aigu s’habitent ici. Sag: La réponse de l'amplificateur à ce qui est joué sur la guitare électrique. Normalement, vous l’entendez au début de la note. Sag provoque de la distorsion. DT50/DT25 FAQ
×