Difference between revisions of "Hitachi SR-904"

 
 
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Receiver mit 2x75 watt sinus. 2 Meter für Tuning und zwei für Leistung. Klass G Schaltung. Für die Zeit recht modenes Designs
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__NOTOC__
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== Data ==
 +
{{navigation}}
 +
'''General'''
 +
* Manufacturer: [[Hitachi]]
 +
* Model: SR-904
 +
* Type: Receiver
 +
* Years of manufacture: 1979 - 1980
 +
* Made in: Japan
 +
* Color: Silver
 +
* Remote control: no
 +
* Power consumption: 250 W
 +
* Dimensions: 490 x 144 x 400 mm (WxHxD)
 +
* Weight: 13,5 kg
 +
* Original price approx.: 1'200 DM
 +
 
 +
 
 +
'''Connections'''
 +
* Number of inputs:
 +
** Phono: 2.5 mV / 47 kOhm, 220 mV max.
 +
** Aux: 200 mV / 50 kOhm
 +
** Tape Play 1, 2: 200 mV / 50 kOhm
 +
** Tape Play DIN 1, 2: 500 mV / 80 kOhm
 +
Adapter: 200 mV / 50 kOhm
 +
** Antenna FM / MW: 75 Ohm / 300 Ohm
 +
* Number of outputs:
 +
** Tape Rec 1, 2: 200 mV
 +
** Tape Rec DIN 1, 2: 50 mV
 +
Headphones
 +
** 2 pairs of loudspeakers
 +
 
 +
 
 +
'''Technical Data'''
 +
 
 +
''Amplifier''
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* Continuous power (DIN)
 +
8 Ohm: 2x 75 W (RMS, 20 - 20'000 Hz)
 +
4 Ohm: 2x 100 W
 +
* Dynamic power
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** 8 Ohm: 2x 150 W
 +
** 4 Ohm:
 +
* Total harmonic distortion: 0.09% (at nominal power)
 +
* Attenuation factor: 45
 +
* Frequency response: 10 - 40'000 Hz, ± 1,5 dB
 +
* Power bandwidth: 8 - 40'000 Hz
 +
* Signal-to-noise ratio: (extraneous voltage)
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** Phono: 75 dB
 +
** High level: 87 dB
 +
* Tone control:
 +
** Bass: ± 10 dB at 50 Hz, 100 Hz
 +
*** Tilt frequencies: 150 Hz, 300 Hz
 +
** Mids: ± 6 dB at 1 kHz
 +
Treble: ± 10 dB at 10 kHz, 20 kHz
 +
*** Tilt frequencies: 3 kHz, 6 kHz
 +
Loudness: + 9 dB at 100 Hz, + 4 dB at 10 kHz
 +
* High Filter: - 8 dB at 10 kHz, 12 dB / octave
 +
* Low Filter (Subsonic): - 8 dB at 50 Hz, 12 dB / octave
 +
* Mute:
 +
 
 +
 
 +
''Tuner''
 +
* Reception: FM, MW
 +
* Frequencies:
 +
** FM: 88 - 108 MHz
 +
MW: 530 - 1'605 kHz
 +
* Frequency response: 30 - 15'000 Hz, + 0,5 dB, - 1 dB
 +
* Input sensitivity:
 +
** VHF: 1.6 µV
 +
MW: 20 µV
 +
* Distortion factor:
 +
** FM: 0.2% (mono), 0.3% (stereo)
 +
MW: 0.2%
 +
Signal-to-noise ratio:
 +
** FM: 74 dB / 68 dB (mono/stereo).
 +
** MW: 50 dB
 +
* Channel separation: 45 dB
 +
* Selectivity:
 +
** FM: 85 dB
 +
** MW: 40 dB
 +
* Equal wave selection:
 +
** FM: 1 dB
 +
* Spurious wave selection: 100 dB
 +
* Mirror frequency attenuation:
 +
** FM: 85 dB
 +
MW: 70 dB
 +
* IF attenuation:
 +
** FM: 100 dB
 +
** MW: 90 dB
 +
* AM suppression: 55 dB
 +
 
 +
 
 +
'''Special Features'''
 +
* Pre-/power stage separable
 +
* 2 VU meters
 +
* VHF Muting, Auto Lock
 +
 
 +
 
 +
== Comments ==
 +
* Other models in the same series:
 +
* [[Hitachi SR-504]]
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* [[Hitachi SR-604]]
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* [[Hitachi SR-804]]
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* [[Hitachi SR-904]]
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* [[Hitachi SR-2004]]
 +
 
 +
 
 +
== Pictures ==
 +
* Image: Hitachi SR-904
 +
[[File:Hitachi SR-904-1.jpg|1600px]]
 +
 
 +
 
 +
== Reports ==
 +
* Review at "Good Old Hifi": [[http://www.good-old-hifi.de/hitachi_sr-904/]]
 +
 
 +
* Report at "Good Old Hifi": [[http://www.good-old-hifi.de/hitachi_sr-904-2/]]
 +
 
 +
 
 +
== Links ==
 +
 
 +
 
 +
[[Category:Receiver]]

Latest revision as of 09:57, 20 October 2018

Data[edit]

General

  • Manufacturer: Hitachi
  • Model: SR-904
  • Type: Receiver
  • Years of manufacture: 1979 - 1980
  • Made in: Japan
  • Color: Silver
  • Remote control: no
  • Power consumption: 250 W
  • Dimensions: 490 x 144 x 400 mm (WxHxD)
  • Weight: 13,5 kg
  • Original price approx.: 1'200 DM


Connections

  • Number of inputs:
    • Phono: 2.5 mV / 47 kOhm, 220 mV max.
    • Aux: 200 mV / 50 kOhm
    • Tape Play 1, 2: 200 mV / 50 kOhm
    • Tape Play DIN 1, 2: 500 mV / 80 kOhm

Adapter: 200 mV / 50 kOhm

    • Antenna FM / MW: 75 Ohm / 300 Ohm
  • Number of outputs:
    • Tape Rec 1, 2: 200 mV
    • Tape Rec DIN 1, 2: 50 mV

Headphones

    • 2 pairs of loudspeakers


Technical Data

Amplifier

  • Continuous power (DIN)

8 Ohm: 2x 75 W (RMS, 20 - 20'000 Hz) 4 Ohm: 2x 100 W

  • Dynamic power
    • 8 Ohm: 2x 150 W
    • 4 Ohm:
  • Total harmonic distortion: 0.09% (at nominal power)
  • Attenuation factor: 45
  • Frequency response: 10 - 40'000 Hz, ± 1,5 dB
  • Power bandwidth: 8 - 40'000 Hz
  • Signal-to-noise ratio: (extraneous voltage)
    • Phono: 75 dB
    • High level: 87 dB
  • Tone control:
    • Bass: ± 10 dB at 50 Hz, 100 Hz
      • Tilt frequencies: 150 Hz, 300 Hz
    • Mids: ± 6 dB at 1 kHz

Treble: ± 10 dB at 10 kHz, 20 kHz

      • Tilt frequencies: 3 kHz, 6 kHz

Loudness: + 9 dB at 100 Hz, + 4 dB at 10 kHz

  • High Filter: - 8 dB at 10 kHz, 12 dB / octave
  • Low Filter (Subsonic): - 8 dB at 50 Hz, 12 dB / octave
  • Mute:


Tuner

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

MW: 530 - 1'605 kHz

  • Frequency response: 30 - 15'000 Hz, + 0,5 dB, - 1 dB
  • Input sensitivity:
    • VHF: 1.6 µV

MW: 20 µV

  • Distortion factor:
    • FM: 0.2% (mono), 0.3% (stereo)

MW: 0.2% Signal-to-noise ratio:

    • FM: 74 dB / 68 dB (mono/stereo).
    • MW: 50 dB
  • Channel separation: 45 dB
  • Selectivity:
    • FM: 85 dB
    • MW: 40 dB
  • Equal wave selection:
    • FM: 1 dB
  • Spurious wave selection: 100 dB
  • Mirror frequency attenuation:
    • FM: 85 dB

MW: 70 dB

  • IF attenuation:
    • FM: 100 dB
    • MW: 90 dB
  • AM suppression: 55 dB


Special Features

  • Pre-/power stage separable
  • 2 VU meters
  • VHF Muting, Auto Lock


Comments[edit]


Pictures[edit]

  • Image: Hitachi SR-904

Hitachi SR-904-1.jpg


Reports[edit]

  • Review at "Good Old Hifi": [[1]]
  • Report at "Good Old Hifi": [[2]]


Links[edit]

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