Item Description

Reed 5T technically is a tangentially tracking pivoted tonearm. It’s working principle is based on Thales’ theorem (if the center of a triangle’s circumcircle lies on the triangle then the triangle is right, and the center of its circumcircle lies on its hypotenuse) and the rule, that given three non-collinear points, it is possible to draw only one circle that has finite radius and passes through all three. (Fig. 1)

• P1, O1, P3 – Thales’ semicircle,
• Angles P1-A1-P3, P1-A2-P3, P1-A3-P3 are 90 degrees each,
• Segments A1B1 = A2B2= A3B3 represent length of a tonearm,
• B – Tonearm vertical axis,
• P2 represents a center of circle, drawn through three points – B1,B2 and B3 (tonearm rotation axis),
• P3 – Linear Sensor Array,
• BP3 – Laser beam.

Arm tube suspension system is similar to one used in Reed 2G tonearm, and the tonearm’s turning part is based on low noise thrust-sleeve bearing. For angular rotation of tonearm we designed and built limited rotation sectional torque motor. Tonearm’s position is controlled by laser and linear sensor array.

Reed 5T has user-replaceable arm tube – feature, which allows to change tonearm’s effective mass yourself. Tonearm also has VTA and azimuth adjustments.

Reed 5T has following advantages if compared with pivot tonearms:

• Smaller moment of inertia,
• No need for anti-skating mechanism,
• Max tracking error is +/- 5 Minute of Angle (MOA). (Figure 2). Pivot tonearms usually have max tracking errors up to 1.5 deg.

Reed 5T’s advantages compared to other tangential tonearms:

• Few times smaller moment of inertia,
• No need for complicated additional devices (air compressor),
• Compact and sleek design.
• Effective mass in both vertical and horizontal directions is similar

Specifications:

• Mounting distance: 251 mm (platter diam.max.= 330 mm)
• Tracking error: +/- 5 Minute of Angle (MOA)
• Effective mass: 8-16 g, depending on armwand material (replaceable armwand)
• Height adjustment: compatible with 28÷48 mm height platters
• VTA adjustment: precision +/- 0.2 mm
• Azimuth adjustment: +/- 8 deg
• Downforce range: 10÷30 mN (cartridge mass 5.5 g – 19.5 g,(4.0 g – 25,0 g))
• Traction: Limited rotation sectional torque linear motor
• Voltage: direct 12 V, using battery power source Reed Source 12V