Hitachi SR-504, 1979, made in Japan

The Hitachi SR-604 features a newly developed high efficiency, high power audio amplifier (class G or dynaharmony) direct connection ocl power amplifier.

Other features include 10-LED power indication, electronic protection circuit, subsonic filter, detent type volume and balance controls, equalizer circuit with high performance IC, tape dubbing, two speaker systems connection, phase locked loop for FM/MPX circuit, ceramic filter, IC in AM tuner, two large easy to read meters and a large sized flywheel tuning knob

Link: radiomuseum | hifiengine
Country: Japan
Manufacturer / Brand: Hitachi Ltd.; Tokyo
alternative name Hitachi Sales Corp. of America
Year: 1979 ??

Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) Semiconductors present.
Reception principle Super-Heterodyne (Super in general)
Wave bands Broadcast (BC) and FM or UHF.
Power type and voltage Alternating Current supply (AC) / 120 Volt
Loudspeaker - This model requires external speaker(s).
Power out
Model: AM-FM Stereo Receiver SR-504 - Hitachi Ltd.; Tokyo
Material Wooden case
Shape Book-shelf unit.

  • Hitachi AM-FM Stereo Receiver Model SR-504.
  • Bass- & Treble-Control, Loudness, Tape Monitor
  • Phono IN
  • AC Outlet 1x Unswitched 120V 200 Watts max.
  • Power Consumpton 150 Watts.
Dimensions: 435 x 144 x 350mm
Weight: 8kg
Year: 1979

Made in Japan

For Model SR-604
Tuning range: FM, MW
Power output: 35 watts per channel into 8Ω (stereo)
Frequency response: 10Hz to 30kHz
Total harmonic distortion: 0.05%
Damping factor: 40
Input sensitivity: 3mV (MM), 150mV (line)
Signal to noise ratio: 70dB (MM), 90dB (line)

service manual

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