Tesla B4

Short description

4 track tape recorder mono

Data

General

• Manufacturer: Tesla
• Model: B4
• Year of manufacture: ca.1966
• Made in: ČSSR
• Colour: grey
• Dimensions (W/H/D): 315 x 300 x 120 mm
• Weight: 7.5 kg
• Original price approx:

Connections Inputs

• DIN 5 turntable 300mV/1,5MOhm
• DIN 5 Microphone 0,8mV/4kOhm

DIN 5 radio 1,6mV/4kOhm Outputs

• DIN 5 radio 0,8V/10kOhm
• DIN 5 diode 0,5mV
• DIN 5 headphones 0,8 - 2,5V/0,5 - 4kOhm
• DIN loudspeaker 4Ohm 3W/1,5% distortion factor

Technical Data

• max. coil diameter: 147mm
• drive: external rotor motor (like Pabst), primary belt to step pulley, friction drive to flywheel mass and bobbin plate
• heads: combi head, erasing head
• Tracks: 4 mono
• Tape speeds: 9.53, 4.76, 2.38 cm/s.
• Slip:
• Synchronization variations: at 9.53 = +/-0.2%, at 4.76 = +/-0.3%, at 2.38 = +/-0.5%.
• Pitch fluctuations:
• Overall frequency response: at 9.53 = 50Hz - 16kHz, at 4.76 = 60Hz - 8kHz, at 2.38 = 100Hz - 4kHz.
• Signal-to-noise ratio:
• Spurious Ratio:
• Distortion ratio:
• Equalization:
• Crosstalk attenuation:
• Cancellation attenuation
• Premagnetization and cancellation frequency: approx.70kHz

Special Equipment

• here, if available

Remarks

Other models of the same series:B41, B43a, B46, B47