Clearaudio STROBOSCOPE TEST RECORD - Manual (Page 2)

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The Clearaudio STROBOSCOPE TESTRECORD satisfies the highest demands for
an exact speed adjustment for turntables.
Dramatic sound improvements can be reached only with exact calibrated speeds.
- Optimal adjustment for turntables -
To adjust the exact speed, please choose the side for 50 / 60 Hz, or the other side for
the use with the speed light first.
If you choose the side without the speed light
source, you can use the regular light source for the
installation, either 50 Hz (outer scales) or 60 Hz.
The scales are graduated in three different reading
options: 33,3 Hz, 45 Hz and 78 Hz (starting from
the outer diameter).
Please place the stroboscope disc on your turntable platter and start the engine of
your turntable. The big advantage of the Clearaudio strobe disc is, that you can
place your cartridge onto the strobe record, while measuring the speed, as there are
grooves provided on the disc. This means, for the first time a real time speed analysis
is possible under realistic circumstances.
If you have the impression that the horizontal lines move on the scale, you should set
or readjust the speed of the motor again.
- If the lines move clockwise, the speed is too fast.
- If the lines move counter clockwise, the motor speed is too slow.
Please correct the speed on your motor or turntable until you have the impression
that the lines stopped moving. After that you have reached the exact speed, you can
enjoy the full potential of your vinyl collection again.
If you use the Speed Light (AC039) you can reach an
even higher or more accurate adjustment, completely
independent of the power line or frequency of your
country. As well, the 300 Hz calibrated light, used as an
external light source is completely independent from
possible power line fluctuations, which could influence
the result by regular light. The 300 Hz of the “Speed
Light” are generated by a stabilized quartz oscillator and
permit a very exact adjustment.
Please put the STROBOSCOPE TESTRECORD with
the fine lines upward on your turntable. Here you also
have the possibility to choose between two different speeds. With the outside scale
you can detect the speed of 33 Hz and with the inside scale you can detect the
speed of 45 Hz. Again, the big advantage of the clearaudio strobe disc is, that you can
place your cartridge onto the strobe record, while measuring the speed, as there are
grooves provided on the disc. This means, for the first time a real time speed analysis
is possible under realistic circumstances.
Press the button of the speed light source and place it parallel over to the scale and
adjust the motor or turntable speed until the horizontal lines do not move anymore.
- Tip -
As more accurate your turntable speed is adjusted, as better the overall sonic
appearance of the record playback will be !
It is mandatory to check the speed several times through out the year, to
ensure that other influences are not minimizing the sound quality.
Please enjoy your vinyl records now even more !
Yours Clearaudio team
Loving music