Main Control Knob Mechanism - Kenwood TS-890S In-Depth Manual

Main Control Knob Mechanism

The main control knob is made of aluminum that is NC-machined.
Its shape was designed by taking into account the rotational balance and suppression of eccentricity. The design results
in a superb operational feeling of a weighted, smooth, and accurate touch. The surface of the main knob 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 main knob shaft, is made of aluminum die-cast. Uncompromising
attention was also given to the texture of the main knob.
The rotation mechanism of the torque adjustment ring 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 main knob side and artificial leather is used for the friction material on the opposite side to
reduce rotation noise and ensure smooth rotation.
Fig. 95 Appearance of the Main Knob
Fig. 96 Inside the Torque Adjustment Ring
MECHANICAL STRUCTURE 11
Main Knob
Ring Knob
Metal Plate
Torque-increase Arm
89