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Binson Echorec B2 and Export Head Specifications

  1. HomeKnowledge BaseBinson Echorec B2 and Export Head Specifications

Binson Echorec B2 and Export Head Specifications

by Phil Taylor

The record and playback heads on the Binson Echorec ‘B2′ (and ‘Export’) models are physically the same however their impedances are different with the D.C. resistance of the record head being around 400Ω and the playback head being around 600Ω. Binson heads were manufactured by Photovox Technology S.R.L. in Italy since the 1950s. The Photovox part number is DA101 for the playback head and AC102 for the record head. More detailed specifications for the heads are shown in the tables below:

Playback head (part# DA101) characteristics
Gap length (μm)5±10%
A.C. inductance L (mH)900±25%
D.C. Resistance R (Ω)600±25%
Track width (mm)2.5±10%
Record head (part# AC102) characteristics
Gap length (μm)10±10%
A.C. inductance L (mH)300±25%
D.C. Resistance R (Ω)400±25%
Track width (mm)2.5±10%

The technical drawing below, reproduced from a Photovox data sheet, shows plan, side and front elevations of the head. All dimensions and tolerances are in millimeters.

binson_echorec_head_dimensions_640px

In This Section

  • Binson Buyer’s Guide
  • Binson Echorec Pages
  • Binson Echorec B2 and Export Head Specifications
  • Binson Echorec Head Adjustment
  • Binson Echorec Manual
  • Binson Echorec Memory System
  • Binson Echorec Parts Suppliers
  • Binson Echorec Schematic
  • Echorec B2 Trimpot Adjustment
  • Echorec Export Trimpot Adjustment
  • Echorec Multi-Section Electrolytic Capacitor Rebuild
  • Geloso Sockets And Plugs
  • Geloso to ¼” Jack Socket Mod
  • Got Oil? Properties of Echorec Oil
  • History of the Binson Amplifier HiFi Company
  • Inside The Binson Factory
  • Recording the Echorec
  • Servicing the Motor
  • T7E Echorec Overhaul
  • The ‘Magic Eye’
  • The Bias Oscillator Inductor
  • The Binson Echorec Chassis
  • The Dark Side of Echorec Restoration
  • The Dream Machine: the Echorec 3°
  • The Green Slime: Echorec Wire Rot And How To Cure It
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