SONY TC-2860SD
¥ 69,800 (released in 1975)
Commentary
Cassette Denske Type III which adopted Dolby NR and F & F head.
It uses 4 power sources such as 100 VAC, dry batteries, rechargeable batteries and car batteries for ordinary homes.
It also has a stabilizing power supply circuit and a DC-DC converter to stabilize the power supply voltage.
The head uses an F & F (ferrite & ferrite) head with an all-ferrite structure that achieves about 200 times more wear resistance than permalloy and improved high-frequency characteristics.
In addition, a direct coupling method using a low-noise transistor at the first stage of the amplifier eliminates elements such as a capacitor between the F & F head and the amplifier, improving the SN ratio and frequency characteristics.
Equipped with Dolby NR system that can be turned on / off.
Uses a DC servo motor with FG for the motor.
Equipped with a 3-stage switchable tape selector.
Equipped with a two stage switching type microphone attenuator.
Equipped with a ON/OFF Sony Limiter Recording switch.
In this function, manual recording is performed when an appropriate input is made, and a limiter circuit is activated when an unexpected large input is made to suppress distortion.
Uses an auto shut-off mechanism.
Built-in speaker with ON/OFF function, volume and tone knob.
It also has an external speaker jack.
Equipped with a lock type pose lever.
Equipped with line / microphone selector switch.
Built-in MPX filter.
Model Rating
| Type | Cassette recorder |
| Wow and flutter | 0.15%WRMS |
| Signal-to-noise ratio | 55 dB (Dual Cassette, Dolby Off, Peak Level) |
| Frequency characteristic | 30 Hz ~ 15 kHz (Dual Cassette Used) |
| External dimensions | Width 378x Height 108x Depth 238 mm |
| Weight | 5.4kg |