Calibrating The Suspension - Oracle Audio Delphi MkVI Gen-2 Owner's Manual

CALIBRATING THE SUSPENSION

Note:
For a more accurate tuning of the suspension system of your Delphi MkVI Second Generation 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 for the following operation.
- 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 inner platter hub and the platter in the spindle holder.

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.
If the lower section of the suspension housing is sitting lower than the "B" step which is 0,850 inch (
Note :
21,6mm ) 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
clockwise as seen from above ). This can be done by lifting the suspension housing so you can grab the spring
with your fingers. If the too few coils of the spring coming out at the bottom of the holder, if the spring 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 changing 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 0.5 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.
Delphi MkVI Gen-2 Owner's Manual Oracle Audio Technologies 12