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psarkissian

Service Engineer Moderator
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Posts posted by psarkissian

  1. - There's is also dual tone effect. This occurs when using Alt Tune function, hearing the standard tune off the guitar,

    while hearing the Alt tuning through the amp. Sounds the worst when it is a half step or whole step down, not so bad

    for 3rds, perfect 4th or 5th.

     

    - Warbling is a result of distance between the strings and pick-up pole pieces. The traverse excursion (sorry for the

    tech jargon) of the string is interrupted by the pull of the magnet on the string, causing it to warble when in modeling mode.

     

    - Whistling howls are a result of tuning or intonation, and are more apparent when using harmonics. Both tuning or intonation

    have to be spot on.

     

    - Palm muting,... make certain all strings are sufficiently muted, so that they won't sympathetically ring. Stiffer picks don't

    make a thwacking noise as much.

     

  2. Put amp into "Standby" mode, main power on, let it warm up 2-3 minutes, then turn standby switch to on position.

    Tube amps that make use of a heater element circuit, it's a good idea to let it warm up 2-3 minutes before taking it out of "Standby" mode.

     

    Swapping tubes,... I hope they are the specified tubes and that the power tubes are matched pairs,....

    DT-50 Series:

    12AX7EH Electro-Harmonix approved for the DT50 pre-amps.

    EL34EH Electro-Harmonix (matched pairs) for the power amps.

     

     ... and that the power tubes were correctly biased.

     

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