Kenwood KR-7070 A

Data

General

• Manufacturer: Kenwood
• Model: KR-7070 A
• Years of manufacture: 1971 - 1973
• Made in: Japan
• Color: Silver, black, walnut wood cabinet
• Remote control: Cable remote control RC-70 A included
• Power consumption: 320 W at full output / 40 W without signal
• Dimensions: 432 x 165 x 370 mm
• Weight: 18 kg
• Original price approx.: 590 US-$, 2'700 DM

Connections

• Number of inputs:
  • Phono 1: 2.5 mV / 50 kOhm, switchable 0.05 mV / 200 Ohm.
  • Phono 2: 2,5 mV / 50 kOhm
  • Aux: 200 mV / 100 kOhm

Tape Play:

• • • Cinch: 200 mV / 100 kOhm
    • DIN:
  • Main In: 1 V / 100 kOhm
  • Antenna: FM (75 Ohm Unbalanced / 300 Ohm Balanced), AM.
• Number of outputs:
  • Tape Rec (Cinch / DIN): 200 mV / 40 mV
  • Pre-Out:
  • Headphones
  • 2 pairs of speakers

Technical Data Tuner Part

• Reception: FM, MW
• Frequencies:
  • FM: 88 - 108 MHz

MW: 520 - 1610 kHz

• Frequency response: 20 - 15,000 Hz (± 1.2 dB, FM)
• Input sensitivity:
  • FM: 1.5µV
  • MW: 15µV

Distortion factor:

• • Mono: < 0.4

Stereo: < 0,6 %

• Signalrauschabstand:
  • UKW: >70 dB
  • MW: > 50 dB
• Common mode selection: 1.5 dB
• Channel separation (1 kHz / 10 kHz): > 35 dB / > 25 dB
• selectivity:
  • FM: > 75 dB

MW: > 30 dB

• Co-wave selection: > 100 dB
• Spurious wave selection: > 55 dB
• Mirror frequency attenuation:
  • FM: > 100 dB
  • MW: > 70 dB

IF attenuation:

• • FM: > 100 dB
  • MW: > 60 dB
• AM suppression: > 55 dB

Technical data amplifier section

• Continuous power (at distortion factor)
  • 8 Ohm: 2 x 90 W
  • 4 Ohm: 2 x 110 W
  • mono output: 5 W
• Dynamic power
  • 8 Ohm: 220 W (IHF)
  • 4 Ohm: 300 W (IHF)
• Total harmonic distortion: 0.1 % at full scale
• Attenuation factor: 50 at 8 Ohm, 100 at 4 Ohm
• Frequency response: 20 - 40000 Hz ± 1.5dB
• Power bandwidth(IHF): 10 - 30000 Hz
• Signal to noise ratio:
  • Phono 1/2: 65 dB
  • Aux/Tape Play: 75 dB
• Tone control:
  • Bass: ± 10 dB at 100 Hz

Treble: ± 10 dB at 10 kHz

• Loudness: 2-stage

Mid: + 6 dB / 100 Hz

• • Max: + 10 dB / 100 Hz, + 5 dB / 10 kHz
• Low Filter: -7 dB at 100 Hz
• High Filter: -10 dB at 10 kHz
• Presence: + 6 dB at 700 Hz
• Audio Muting: - 20 dB

Special Features

• Cable remote control RC-70 A for car tuning (new with volume control)
• Presence switch
• Separable pre- and power amplifier
• VHF center display instrument
• FM Muting
• Note: in some countries the unit was originally supplied with metal cover. The walnut wood cabinet was optionally available under the designation SR-77 for example in the USA for 24.95 US-$.

Remarks

• Other models of the same series:
  • Kenwood KR-2120
  • Kenwood KR-3130
  • Kenwood KR-4140
  • Kenwood KR-5150
  • Kenwood KR-6160
  • Kenwood KR-7070
  • Kenwood KR-7070 A

• FM multipath output to oscilloscope such as.
  • [[Kenwood KC-6060 A
  • Kenwood KC-6060 A

Pictures

• Kenwood KR-7070 A

• Kenwood KR-7070 A wired remote control RC70 A, new with volume control.

Links

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