RFT BG 20-6 Smaragd

Data[edit]

RFT Tape Machine BG 20-6 Smaragd

General:

  • Manufacturer: RFT Zwönitz
  • Model: Smaragd
  • Year of manufacture: from ca 1956
  • Made in: Germany, GDR
  • Color: brown
  • Remote control: yes, electric wired
  • Power consumption: 250 watts
  • Dimensions:
  • Weight approx: 20 kg
  • New price approx.: 1200 DDR mark

Connections:

  • Number of outputs:
    • Radio ect. "diode socket" MONO
    • Loudspeaker: 2 Watt
  • Number of inputs:
    • Microphone
    • Radio

Technical data:

  • Tube device: Mono
  • max. coil diameter: 18 cm
  • drive: 1 motor, pole-changing, large flywheel mass, 1 × belt drive
  • heads: 1 × erase-/ 1 × sound head, moderate quality
  • Tracks: half-track mono
  • Tape speeds: 2 ( 9.5 and 19 cm/s )
  • Synchronisation fluctuations: 0.3
  • Pitch fluctuations:
  • Overall frequency response: 40-16,000 Hz at 9.5 cm/s, 40-18,000 Hz at 19 cm/s.
  • Signal-to-noise ratio: 45 dB
  • Spurious signal-to-noise ratio:
  • Distortion: 5%
  • Equalization:
  • Crosstalk attenuation:
  • Cancellation attenuation: max 40 dB
  • Premagnetization and extinction frequency:

Special features:

  • remote control: yes
    • electromechanical control
    • electric brakes, electric clutches (drive)
    • display tube EM 11 - magic eye !

Remarks[edit]

  • problems with modern tape material, min 35 µm BASF~ er (tape tension), sound respectable at 19 cm/s
  • Other models of the same series:

Pictures[edit]

RFT BG 20-6 Smaragd

Reports[edit]

Links[edit]