disc-contact Vacuum Record Clamp
The disc-contact vacuum record clamp consists of:
-a special disc-contact-mat (T)
-a sealing disc @
-a vacuum puck (3)
-a vacuum pump with connecting tube and coupling (4)
Included as accessories are a clamp (5) for holding the tube when not in use and self-adhesive sealing foil @ for damaged record labels.
By employing reduced air pressure, the clamp presses the record firmly onto the turntable mat. Distortion and tonal colorations are thereby effectively prevented, especially with thin or warped records.
The advantage of the technique employed is that the platter bearing and spindle are not subjected to reduced air pressure during record play. Therefore, vacuum seals which could impair rumble and wow-and -flutter performance are not required.
Installation of the disc-contact Mat on THORENS Turntables (except TD 104/105 and TD 524)
To permit the rubber drive belt to be exchanged as required, the disc-contact mat is bonded only to the outer turntable platter.
1.Remove the standard turntable mat from the turntable platter. Clean the surface of the outer platter with denatured alcohol.
2.Press the sealing disc with the flat side facing upwards onto the turntable spindle. Clean the surface of the disc with denatured alcohol.
3.Peel off the inner protective paper ring from the underside of the disc-contact mat to expose the adhesive surface. Position the middle hole over the turntable spindle and press the center of the mat lightly onto the sealing disc.
4.Lift one side of the disc-contact mat from the rim of the turntable platter and peel off the half of the outer paper ring underneath. Press and stroke this section of the mat outwards to bond it to the platter without trapping air pockets inbetween (Figure 2).
5.Peel off the second half of the outer ring from the other side of the mat and bond this section to the platter in the same manner as in step 4.
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