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© clearaudio electronic GmbH, 2018/12
User manual / Bedienungsanleitung
The Clearaudio
Stroboscope test record
and 300Hz
speed light
enable you to make extremely
precise speed adjustments to your turntable.
Dramatic sound improvements can be achieved with precisely calibrated speeds. There are three
speed settings: 33.3rpm, 45rpm and 78rpm (starting from the outer diameter).
By using the
speed light
(AC039) you achieve an even more accurate
setting, completely independent of the mains electricity frequency of
your country. The 300Hz calibrated light, used as an external light source,
is unaffected by the potential power fluctuations that can influence the
result when using regular mains powered light. The 300Hz frequency of
the
speed light
is generated by a stabilized quartz oscillator and enables
a very exact adjustment.
Please put the
Stroboscope test record
on your turntable with the rings of fine stroboscope lines
facing upward. The
Stroboscope test record
will measure three different speeds: the outer ring
indicates the speed at 33.3rpm, the middle ring 45rpm and the innermost ring indicates the speed
at 78rpm.
Now start the turntable motor and select the speed that you wish to measure.
Press the button of the speed light and hold it over the scale so that it shines onto the strobe ring.
The lines of the strobe ring indicating the chosen speed should appear to be stationary. If they are
moving, then adjust the turntable speed according to the turntable user manual until the lines do
not appear to move.
- If the lines move clockwise, the speed is too fast.
- If the lines move anti-clockwise, the speed is too slow.
Once you have set the exact speed, you can enjoy the full potential of your vinyl collection.
Technical data:
Speed light
Light source:
Blue LED / 300Hz precision light source (calibrated)
Battery:
V 23GA – 12V – alkaline (Art.-No.: AC039/B)
Please note:
An insufficient battery voltage can lead to inaccurate measurement results, even if the voltage is still
sufficient to light the blue LED.
In case of extreme fluctuations of the measurement results, we recommend replacing the battery.
