Oracle Audio Technologies
12
CALIBRATE THE SUSPENSION
Note:
For a more accurate tuning of the suspension system of your Oracle MK VI we recommend that you
install an old record and the record clamp on the platter, this will give a more accurate static load on the sub-
chassis.
-
Do not install the drive belt or the phono lead
.
-
Start the calibration with the Right side suspension module, near the tone arm, then
move to the Rear Left and finally to the Front Left suspension module.
-
Do no install the suspension caps at this time
•
Position the sub-chassis over the suspension tower modules.
•
Install the platter in the spindle holder …
without the drive belt
.
•
Locate the suspension gauge in the tool bag. Note : Do not take into
consideration the section "A", 1 or 2 as they were designed for earlier
models of Oracle turntables.
•
Place the gauge on the acrylic base with the "B" side against the lock feet.
Note :
If the lower section of the suspension housing is sitting lower than the “B” step on the suspension
gauge, this is an indication that the spring calibration is too soft. Make the spring stronger by grabbing the large
end of the spring below the spring holder and turn clockwise ( remember … as seen from above ). This can be
done by lifting the suspension housing so you can grab the spring with your fingers. If the spring coming out at
the bottom of the spring holder is too short to hold with your fingers use needle nose pliers and hold the spring
by inserting the tip between two coils.
•
Make a first round of calibration of the suspension system so all three suspension housings are set at
about 3 mm (0,125 inch) above the "B" step. To do so hold the spring from above the suspension
housing and rotate counterclockwise by small increments. This will result in making the spring softer
thus allowing the suspension housing to sit lower.
Note :
After you’ve changed the setting of a spring always apply a slight downward pressure then lift the
suspension housing slightly to unload the twisting stress. This will achieve a more exact reading of the
adjustement just performed.
•
Make a final round of calibration of the suspension system so all three suspension housings are set at
about .5 mm (0,020 inch) above the "B" step.
•
Over a period of a few days the springs suspension system will set to the desired optimal setting.
