Fy i det mørkeste, villest og brennende Hades hvor bra denne skiva er! Det er bare å skamme seg for de som ikke har gitt denne en sjanse.
Vis vedlegget 244807
Tedeschi Trucks Band - Made Up Mind. 2013.
Det var fortsatt dette styggodet,
Azimut, da....
Pokker, hvor trege går det an å være??!!
Cartridge Alignment: The Basics Explained
Azimuth: Even more critical (in my opinion) to proper set-up than VTA, is cartridge azimuth. Unfortunately VTA gets all the press, therefore many people are not aware of the importance of this adjustment. What is azimuth? Looking at the cartridge body from the front, it is the left to right tilt of the cartridge body. Contrary to popular belief, azimuth is not necessarily correct with the sides of the cartridge body are perpendicular to the record surface. What we're actually looking for is the correct relationship of the stylus to the groove. Unfortunately, the vast majority of styli are not mounted perpendicular to the bottom of the cartridge body, thus making azimuth set-up by sight alone erroneous. And with the current trend toward decreasing stylus size, even seeing the stylus without the aid of magnification borders on the improbable. The "eyeball" or "mirror" method should only be employed if other more sophisticated methods are unavailable.
The gold standard for determining the correct azimuth is a dedicated cartridge analyzer or Fosgate Fozgometer from Musical Surroundings (see below). A test tone (typically 1kHz) is played on one channel while the analyzer looks at the output from the opposite channel. This crosstalk is a measure of cartridge separation. When the crosstalk is at its lowest, and equal on both channels, the azimuth is optimized. If you can obtain a test record, an oscilloscope or accurate digital voltmeter can be substituted for the dedicated cartridge analyzer mentioned above.
Lacking the test equipment previously described, other less sophisticated methods may be employed to set azimuth. The simplest alternative, connect one channel of the cartridge out of phase with the other (simply reverse the + and - on one channel only) and play a test record with a mono track or a monophonic record (preferably one with simple instrumentation). Out of phase information cancels so adjust azimuth by tuning for least output.
From Harry Weisfeld at VPI comes yet another rather simple method, requiring only a mono record and a pair of ears. He suggests that a simple mono recording of voice should provide a stable, non-wavering image, precisely centered between the two speakers. Adjust the azimuth to achieve optimum results. This method works well if you’re practiced enough to know what to listen for, though most listeners would be better served by using one of the tests outlined previously. Best option, use the Fozgometer.
From a mechanical standpoint, adjusting azimuth on some tonearms may be difficult. Some manufacturers (e.g. SME, Rega), in their unbending quest for maximum rigidity, have eliminated azimuth adjustments altogether. In most cases, this doesn't mean that you are stuck with an improperly aligned cartridge, but it does mean that your task is a bit more formidable. Arms lacking these adjustments must be shimmed at the base (or the cartridge adjusted with washers) to achieve accurate azimuth. It's a pain, but worth the effort.
Note: The SME IV, IV-Vi and V do not have dedicated azimuth adjustments, but their azimuth can be changed. Simply loosen the two base locking screws and, by firmly grasping the bearing housing at the back of the tonearm, you can shift the arm left-right a few degrees. While this is not a wide range of adjustment, it will be enough to correct for any minor cartridge deficiencies. Re-tightening the base locking screws will lock in the adjustments. REGA tonearms do not have adjustable VTA.
Zenith: Aligning the stylus with in the groove in the horizontal plane dials in zenith. Looking down on the cartridge from above, zenith is changed by rotating the cartridge (as if around a clock face). Of course there is only a very small amount of adjustment possible on most arms, just the play in the mounting screws.
Zenith is best adjusted using test equipment, but one can (assuming the stylus is correctly mounted to the cantilever) also adjust by eye using an overhang gauge with an alignment grid. Simply sight down the cantilever from the front, aligning it with the line directly below it on the gauge.
We recommend using the Fozgometer to correctly set Azimut
FOSGATE FOZGOMETER AZIMUTH RANGE METER at Music Direct
http://www.osageaudio.com/images/Mu...gometer_Testing_and_Calibration_Procedure.pdf
Tenker en gammel mekanikker som meg fikser dette med et sett gode briller og et Fozgometer, tror vi brukte speil i gammeldager men det var ikke så nøyaktig.