TRIO TW-510
¥ 59,800 (around 1967)
Commentary
AM/FM stereo receiver developed on the basis of experience and technology for solid state.
The main amplifier is an OTL circuit of SEPP. This circuit uses a mesa silicon transistor to improve various characteristics.
In addition, it is equipped with a unique protection circuit which recovers automatically.
The equalizer amplifier is a direct-coupled amplifier circuit that does not use CR for the coupling between the amplifier stages to improve the low-frequency characteristics.
It is equipped with functions such as low filter, high filter, tone control and loudness control.
The FM front-end uses FET to improve various characteristics such as image ratio, intermodulation and S/N ratio.
A 5-stage IF amplifier and a 4-stage limiter configuration are adopted, and the MPX section adopts a CCM switching method.
It is equipped with an automatic switching circuit between FM mono and stereo, and a muting switch to cut noise between stations.
Model Rating
| Type | AM/FM stereo receiver |
| Tuner Section | |
| Receiving frequency | FM : 76 to 90 MHz AM : 520 to 1610 kHz |
| Sensitivity (IHF) | FM : 2.0 μ V/84MHz AM : 150 μ V/m, 1 MHz |
| Image ratio | FM:72dB(84MHz) AM:45dB(1MHz) |
| Frequency characteristic | FM : 20 Hz to 20 kHz ± 0.5 dB |
| Signal-to-noise ratio | FM : 70 dB or more (100% modulation, 100 μ V input) AM : 45 dB or more (30% modulation, 1 mV input) |
| Distortion factor | FM : not more than 0.7% |
| Antenna input impedance | FM : 300 Ω Balanced Type |
| Frequency drift | FM : within ± 30 kHz |
| <FM Multi Section> | |
| Separation | 38 dB or More (400 Hz) |
| Distortion factor | Not more than 0.7% |
| Carrier leak | -45dB or less |
| Amplifier Unit | |
| Effective power | 20W/20W (8 Ω, Strain 0.8%) |
| Music power | 50W (8 Ω, Strain 0.8%) |
| Frequency characteristic | 15 Hz to 50 kHz ± 0.5 dB |
| Output band characteristic | 18 Hz to 60 kHz -3dB (0.8% distortion, effective output) |
| Distortion Factor (1 kHz) | 0.8% or Less (Output 20W/20W) 0.2% or Less (Output 18W/18W) 0.15% or Less (Output 17W/17W) |
| Gain / Impedance at 1 kHz, Effective Output | MAG : 2.1mV/100k Ω Tape HD : 2.5mV/100k Ω AUX, Tape Play : 130mV/50k Ω |
| Tone control | 100 Hz : + / - 11 dB 10 kHz : ± 11 dB |
| Loudness control (Volume -30dB) | 100Hz:+9dB 10kHz:+3dB |
| Equalizer | RIAA, NAB |
| Filter | Low Filter : 80 Hz or less, 6dB/oct. High Filter : 6 kHz or higher, 6dB/oct. |
| SN ratio (volume maximum, tone control flat) | MAG, Tape HD : 60 dB AUX, Tape Play : 73 dB |
| Residual noise | 0.8 mV (8 Ω, Volume minimum) |
| Damping factor | 23 (8 Ω) 46 (16 Ω) |
| <General> | |
| Accessory circuit | FM mono to stereo automatic switching device FM muting switch FM stereo display lamp 4-stage FM noise limiter SCA Filters AM bar antenna Tape monitor Protection circuit Stereo headphone jack High / low filter Loudness control CR Type Tone Control Mono output terminal DIN standard recording and re-connector |
| Semiconductor used | Transistor : 37 FET : 1 Diode : 24 units |
| Pwer | 100 VAC / 117 V, 50Hz/60Hz |
| Power consumption | No signal : 20W Maximum output : 100W |
| External dimensions | Width 420x Height 140x Depth 310 mm |
| Weight | 10.5kg |