Philips RK 25

Data

General

• Manufacturer: Philips
• Model: RK 25 (other name for the EL 3553)
• Type: Fully transistorized four-track mono tape recorder with 2 tape speeds.
• Years of manufacture: 1965 - 1966
• Manufactured in: Germany
• Color: 2-tone grey
• Case: Polystyrene case
• Remote control: Yes, EL-3984
• Power consumption: approx. 40 watts
• Dimensions (WxHxD): 395 x 285 x 135 mm
• Weight: approx. 7 kg
• New price approx:

Connections

• Number of outputs: 4
  • Loudspeaker: 2 built-in
  • Outdoor speakers: 2 x 5 W
  • Line-out stereo: 2 x 1 V
  • Headphones
• Number of inputs: 3
  • Microphones: 0.5 mV, 5 kOhm
  • Record player: 120 mV, 1 MOhm
  • Radio: 2 mV, 20 kOhm

Technical Data

• Max. coil diameter: 18 cm
• Drive: 1 asynchronous motor
• Heads: 2
• Tracks: 4
• Tape speeds: 4.75 cm/s, 9.5 cm/s
• Slip:
• Synchronous fluctuations: less than 0.3 %
• Pitch fluctuations:
• Frequency response:
  • 4.75 cm/s: 60 - 10000
  • 9.5 cm/s: 60 - 15000 Hz
• Signal-to-noise ratio: > 50 dB
• External signal-to-noise ratio:
• Distortion factor:
• Equalization:
• Crosstalk attenuation:
• Cancellation attenuation:
• Premagnetization and extinction frequency:
• Output power 2 x 3 W (built-in speakers).
• Output power 2 x 5 W (external speakers)

Special Features

• Duoplay
• Multiplay
• Tone control
• Automatic limit stop
• Illuminated tape counter
• Separately adjustable recording levels for microphone and radio
• Counter with reset button

• Other models in the same series:
  • Philips RK-12
    • RK 12
  • Philips RK-25
    • RK 25
  • Philips RK-37
  • RK 37
  • Philips RK-65
    • RK 65
  • Philips RK-66
    • RK 66

Pictures

• Image: Philips RK-25

• Add-on amplifier EL-3787 for duoplay, multiplay and stereo playback.

Links

• External link "Hifi Archive" for Service Manual Philips RK-25: [[1]]