Beocord 1800

Data[edit]

General

Connections

Number of outputs: 3
- Radio (1.25 V / 7.5 kΩ)
- Line (1.25 V / 7.5 kΩ)
- Headphones: (0.8 V / 47 kΩ or 1.8 V at 470 Ω, volume adjustable).
Number of inputs: 4
- Microphone (50-200 Ω sym., 35 μV / 1,000 Hz).
- Radio low impedance: (47 kΩ 2.5 mV / 1,000 Hz).
- Radio high impedance: (100 kΩ 2.5 mV / 1,000 Hz).
- Phono low impedance: (47 kΩ 2.5 mV / 1,000 Hz)
- Phono high impedance: (100 kΩ 2.5 mV / 1,000 Hz)

Line (47 kΩ 250 mV / 1,000 Hz)

Technical Data

Coil diameter: max. 18 cm
Drive: 1 motor
Heads:
- Type 4132 (half gauge): 4
- Type 4138 (quarter gauge device): 3
Tracks:
- Type 4132 (half-gauge unit): 2, reproduction also for quarter gauge
- Type 4138 (quarter-track unit): 4
Tape speeds: 4.75 - 9.5 - 19 cm/s, max. deviation 1%.
Slip:
Synchronous fluctuations:
- at 4.75 cm/s: < 0.18% (effective), < 0.5% (peak).
- at 9.5 cm/s: < 0.11% (effective), < 0.3% (peak)
- at 19 cm/s: < 0.07% (effective), < 0.2% (peak).
Pitch fluctuations:
Overall frequency response:
- at 4.75 cm/s: 30 - 7,500 Hz (±2 dB, 40 - 6,000 Hz).
- at 9.5 cm/s: 20 - 15,000 Hz (±2 dB, 30 - 13,000 Hz)
- at 19 cm/s: 20 - 20,000 Hz (±2 dB, 30 - 18,000 Hz)

Signal-to-noise ratio:

- Type 4132 (half-track unit): > 60 dB (DIN 45 405), > 65 dB (IEC 123-A).
- Type 4138 (quarter-track device): > 57 dB (DIN 45 405), > 62 dB (IEC 123-A)
External voltage spacing:
Distortion factor:
Equalization: DIN 45 513, 1966-67, NAB 1965.
Distortion: < 3% über Band bei VU Null
Übersprechdämpfung Mono: >60 dB /1,000 Hz, > 50 dB / 10,000 Hz
Stereo crosstalk attenuation: > 55 dB / 1,000 Hz, > 45 dB / 10,000 Hz
Cancellation attenuation: 70 dB with 100kHz push-pull oscillator
Premagnetization and cancellation frequency: 100 kHz

Special Features

</3%>