VICTOR/JVC AST-120T
¥ 41,900 (around the late 1960 s?)
Commentary
An FM/AM receiver equipped with a slide-type graphic control volume, etc.
The power amplifier uses quasi-frequency ITL and OTL circuits that do not use transformers. Since all the drivers after the driver are directly connected to DC, complimentary service characteristics with less distortion are obtained.
In addition, distortion is suppressed by installing a rumble filter of 30 Hz or less in the low frequency range.
The FM front-end uses a field-effect transistor (FET) to improve sensitivity to weak radio waves.
It is equipped with an SEA connector that can be connected to an SEA controller that can correct the sound characteristics of the listening room and adjust the sound quality. This SEA connector can be developed into a multi-channel system and can be used independently for pre-main and main use.
Equipped with 2 speaker terminals.
.JPG)
Model Rating
| Type | Graphic control stereo tri-amp |
| FM Tuner Section | |
| Circuit system | Separately excited oscillation type superheterodyne using 3-row varicon FET |
| Receiving frequency | 76 MHz to 90 MHz |
| Sensitivity | 1.4 μ V (IHF) |
| Distortion factor | 0.8% or less (100% MOD) |
| Image ratio | 60 dB or more |
| FM frequency drift | Not more than 0.02% |
| Antenna input | 300 Ω Balanced Type |
| Attachment | With Tuning Meter |
| <FM MPX Part> | |
| Circuit system | Superheterodyne |
| Separation | 36 dB or more |
| Filter | With SCA Filter |
| Attachment | Stereo radar |
| <AM Tuner Section> | |
| Circuit system | Superheterodyne |
| Receiving frequency | 535 kHz to 1605 kHz |
| Sensitivity | 30 μ V (IHF) |
| Image ratio | 45 dB or more |
| Preamplifier Section | |
| Circuit system | Direct-coupled 2-stage equalizer amplifier, CR control amplifier |
| Output | 600 mv (Strain 0.5% or less) |
| Sensitivity | Phono : 1.6mV/50k Ω AUX : 100mV/50k Ω Mic : 6mV/50k Ω |
| Tone control | Bass : 100 Hz, ± 11 dB Treble : 10 kHz, ± 11 dB |
| Loudness | 100Hz:+9dB 10kHz:+6dB |
| Output terminal | Din Rec Out, Pin Rec Out Pre Out |
| Signal-to-noise ratio (IHF) | Phono : 60 dB or more AUX : 70 dB or more |
| Power Amplifier Unit | |
| Circuit system | Quasi complimentary service SEPP-OTL |
| Output | Maximum : 45W (22.5W + 22.5W) Music Power : 36W (18W + 18W) Effective output (8 Ω, strain 0.5%) : 24W (12W + 12W) |
| Distortion factor | 10W (one channel) : 0.2% or less 0.1W (single channel) : 0.1% or less |
| Frequency characteristic | 30 Hz to 50.000 Hz ± 3 dB |
| Rumble filter | 30 Hz or less, -12dB/oct. |
| Residual noise | 1 mV or less |
| Signal-to-noise ratio | 80dB(IHF) |
| Sensitivity | 100 mv (Effective Output) |
| Damping factor | 20 (8 Ω) |
| Output terminal | Speaker1, 2 (1 + 2 output possible) |
| Protection circuit | Fuse Used |
| Attachment | Mode Tape monitor Loudness switch Microphone terminal Headphone port |
| <General> | |
| Semiconductor used | Transistor : 27 FET : 1 Diode : 18 pcs |
| Power supply voltage | 100 VAC, 50Hz/60Hz |
| Power consumption | No signal : 15W Maximum output : 62W |
| External dimensions | Width 412x Height 115x Depth 305 mm |
| Weight | 7.5kg |