Telefunken TR-550 AM/FM Stereo Receiver, 1979-1981, made in Germany

Link: radiomuseum | hifi-wiki | hifiengine | john.ccac.rwth-aachen

Generally

• Manufacturer: Telefunken
• Model: TR 550
• Type: Receiver
• Years of construction: 1979 - 1981
• Made in Germany
• Color: silver, black
• Remote control:
• Power consumption:
• Dimensions: 455 x 135 x 360 mm (WxHxD)
• Weight: 11.2 kg
• New price approx .: 1,200 DM

connections

• Number of entrances:
  • Phono (MM): 2.5 mV / 47 kOhm
  • Tape play: 150 mV / 35 kOhm
  • Aux 1: 150 mV / 35 kOhm
  • Phono / Aux-2: switchable
• Number of exits:
  • Tape Rec:
  • 2 headphones
  • 2 pairs of speakers

Technical specifications

amplifier

• Continuous output (with distortion factor)
  • 8 ohms:
  • 4 Ohm: 2x 90 W DIN
• Dynamic performance
  • 8 ohms:
  • 4 ohms: 2x 130 W.
• Total Harmonic Distortion: 0.009%
• Damping factor: 55 (8 ohms)
• Frequency response:
  • Phono (RIAA): 20 Hz - 20 KHz
  • CD, tape, aux: 7 Hz - 100 KHz
• Signal-to-noise ratio:
  • Phono: 80 dB
  • CD, tape, aux: 95 dB
• Stereo channel separation:
• Tone control:
  • Bass: ± 10 dB
  • Treble: ± 10 dB
• Loudness: yes
• High filter: yes
• Low filter (subsonic): yes
• Mute:

tuner

• Reception: FM, MW, LW
• Frequencies:
  • FM: 87.5-108 MHz
  • MW: 535-1605 kHz
  • LW: 150-350 kHz
• All other information for VHF
• Frequency response:
• Input sensitivity: 11.8 dBf
• Total harmonic distortion: 0.25%
• Signal-to-noise ratio: 72 dB
• Channel separation: 65 dB
• Selectivity: 65 dB
• Single frequency selection: 1.5 dB
• Secondary wave selection:
• Image frequency attenuation: 90 dB
• IF attenuation:
• AM suppression:
• Station memory: 7 each

Special equipment

• 2 microphone connections on the front
• VHF muting
• VHF ASL
• VHF AFC
• Tuning setting and field strength display via LED light strip