SONY STR-7035
¥ 67,800 (around 1975)
Commentary
An AM/FM stereo receiver developed by putting in the technology obtained in STR-7065, etc.
A newly developed junction FET has been adopted for the FM front-end to improve reception capability.
In addition, by using a solid-state filter in the IF section, the separation of adjacent channels is improved, and the ability to receive weak radio waves adjacent to powerful stations is also improved.
By adopting a frequency number line type varicon, it is possible to synchronize by dialing at equal intervals.
Solid state filter is used for AM part.
The power amplifier uses a hybrid power IC2 power source direct coupling system.
The tone control circuit uses NF type.
Built-in microphone amplifier for mixing.
In addition to a filter switch for removing scratched noise and ヒズノイズ, a loudness switch and a speaker switch for using two sets of speakers simultaneously or independently are incorporated.
.JPG)
Model Rating
| Type | All-silicon transistor FM/AM stereo receiver |
| Circuit system | Power amplifier 2 power supply Direct coupling pure complimentary service SEPP circuit |
| FM Tuner Section | |
| Receiving frequency | 76 MHz to 90 MHz |
| Sensitivity | 2.2 μ V (IHF) 1.7 μ V (S/N 30 db) |
| Signal-to-noise ratio | 68dB |
| Capture ratio | 1.5dB |
| Selectivity (IHF) | 60dB |
| Image interference ratio | 55dB |
| Intermediate frequency interference ratio | 90dB |
| Spurious interference ratio | 78dB |
| AM suppression ratio | 55dB |
| Frequency characteristic | 30 Hz ~ 15 kHz + 0 -1dB |
| Distortion Factor (400 Hz, 100% modulation) | mono:0.3% stereo:0.8% |
| Separation | 35 dB or More (400 Hz) |
| Antenna terminal | 300 Ω Balanced Type 75 Ω Unbalanced Type |
| <AM Tuner Section> | |
| Receiving frequency | 530 kHz to 1605 kHz |
| Intermediate frequency | 455kHz |
| Sensitivity | 48dB/m (when bar antenna is used) 30 μ V (when external antenna is used) |
| S/N | 50dB |
| Image interference ratio | 56dB(1000kHz) |
| IF interference ratio | 40dB(1000kHz) |
| Distortion factor | 0.8% |
| Antenna | Ferrite bar antenna With External Terminal |
| Power Amplifier Unit | |
| Effective output (both channel drive) | 24W + 24W (8 ohm, 40 hz to 20 khz) 28W + 28W (4 ohm, 1 khz) 26W + 26W (8 ohm, 1 khz) |
| Dynamic Power (IHF) | 80W (4 Ω) 65W (8 Ω) |
| Harmonic distortion factor | 0.8% or Less (Rated Output) 0.1% or Less (at 1W Output) |
| Cross modulation distortion factor (60Hz:7kHz=4:1) |
0.8% or Less (Rated Output) 0.1% or Less (at 1W Output) |
| Damping factor | 25 or More (1 kHz, 8 Ω) |
| Preamplifier Section | |
| Input Sensitivity / Impedance | Phono : 2.5mV/47k Ω Aux, Tape1, 2, Rec/PB (input section) : 250mV/100k Ω Mic : 2mV/47k Ω |
| Signal-to-noise ratio | Phono : 60 dB or more (input 2.5 mV, B network) Tape1, 2 rec / PB (input section) : 80 dB or more (input 250 mV, A network) Aux : 70 dB (input 250 mV, A network) Mic : 60 dB (input 2 mV, B network) |
| Output Level / Impedance | Rec out : 250mV/10k Ω Rec/PB (Output Part) : 30mV/82k Ω |
| Frequency characteristic | Phono : RIAA curve ± 2 dB Aux, Tape, Rec/PB (input section) : 30 Hz ~ 40 kHz + 0 -3dB Mic : 30 Hz ~ 10 kHz + 0 -3dB |
| Tone control | Bass : + / - 10 dB (100 Hz) High tone : ± 10 dB (10 kHz) |
| Filter | High Filter : 5 kHz, 6dB/oct. |
| <General> | |
| Semiconductor used | Transistor : 34 (including FET) IC : 2 Diode : 21 |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power outlet | Power switch not linked : 150Wx2 systems |
| Power consumption | 80W |
| External dimensions | Width 427x Height 149x Depth 340 mm |
| Weight | 8.6kg |