Pioneer CT-4040A
¥ 45,000 (around 1974)
Commentary
Stereo cassette deck with built-in Dolby system.
The built-in Dolby system improves SN.
Also, the lamp is designed to turn on when the Dolby system is in operation.
The recording bias value can be set to match tape characteristics such as standard, low noise, and chrome, so that maximum output can be obtained at a low distortion rate.
A combination of this and an equalizer enables recording and playback over a wide frequency range and dynamic range.
In addition, a new equalizer (70 μ s) has been adopted for the chrome tape to improve SN.
Easy-to-operate slide-type level control is adopted.
In addition, it has a long stroke of 60 mm that can be finely adjusted, and recording and playback can be controlled independently, making it a convenient structure for adjusting the volume balance with the tuner and player output during playback, as well as for headphone monitoring.
If you press the skip button during playback, you can fast-forward at about twice the speed while listening to monkey talk.
It uses an electronically controlled DC motor that combines a transistor and a diode to constantly keep the DC voltage supplied to the motor constant.
This reduces uneven rotation caused by voltage fluctuations and load fluctuations.
In addition, because of the DC motor, induction noise and hum, which are likely to occur in AC, do not occur.
Uses a permalloy solid head that has approximately 10 times more wear resistance than conventional permalloy heads.
The head gap is 1.5 μ.
Uses a contactless auto-stop mechanism that automatically opens the mechanism when the tape is finished.
It is equipped with a tape travel pilot that rotates around the tape travel.
The lamp turns red during recording.
Equipped with a mode switch for switching between stereo and monaural.
Model Rating
| Type | Light motor vehicle set, stereo / mono |
| Recording system | AC bias, 85 kHz |
| Erasing method | AC push-pull system |
| Heads | Recording and Playback : Permalloy Solid Erasing : ferrites |
| Motor | Electronically controlled DC motor |
| Quick winding speed | About 80 seconds (at C-60) |
| Uneven rotation (Wrms) | 0.13% |
| Equalizer | 120 μ s/70 μ s (at Chrome) |
| Frequency characteristic | General Tape : 30 Hz ~ 12500 Hz, 63 Hz ~ 10000 Hz ± 3 dB Chrome Tape : 30 Hz ~ 15000 Hz, 63 Hz ~ 12000 Hz ± 3 dB |
| S/N | 48 dB (333 Hz, General Tape, Maximum Recording Level Weighted) 58 dB (5 kHz, general tape, maximum recording level Dolby NRON Weighted) |
| Input | MIC : 0.5 mV ~ 90mV/20k Ω (6 φ Jack), Low Impedance Microphone Available Line : 50 mv ~ 9V/300k Ω (Pin Jack) Rec/PB : 15 mv ~ 2.7V/10k Ω (DIN Standard Jack) |
| Output | Line : 300mV/50k Ω (pin jack) Rec/PB : 300mV/50k Ω (DIN Standard Jack) Headset : 40mV/8 Ω (6 φ Jack) |
| Semiconductor used | Transistor : 26 FET : 2 IC : 2 Thyristor : 1 Diode : 18 pcs Zener diode : 4 pcs |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 13W |
| External dimensions | Width 396x Height 96x Depth 242 mm |
| Weight | 4.7kg |
| Attachment | 2 Pin Cords |