Main Control Knob Mechanism - Kenwood TS-990S In-Depth Manual

09 TECHANICAL STRUCTURE

Main Control Knob Mechanism

The main control knob is made of aluminum and is NC‑machined.
Its shape was designed by taking into account the rotation balance and eccentricity suppression. The design results
in a superb operational feeling of a weighted, smooth, and accurate touch. The surface of the Tuning knob (main) is
machined by a specially‑designed tool bit and is finished so that it has a radially lucent spin‑cut pattern.
The torque adjustment ring, which is placed on the Tuning knob (main) shaft, is aluminum die‑cast. The operational
feeling and texture of the ring knob has no compromise.
The rotation mechanism of the torque adjustment ring knob employs a coated metal plate in its slider block, which
secures better clicks, smoother rotation, and longer durability.
Furthermore, its friction material is carefully chosen for better torque adjustment. An aluminum sheet is used for the
surface of the arm on the Tuning knob (main) side and artificial leather is used for the friction material on the opposite
side, to reduce rotation noise and secure smooth rotation.
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Fig. 15 Appearance of the Main Tuning Knob
Fig. 16 Inside the Torque Adjustment Ring
Main Knob
Ring Knob