Pioneer RT-707
¥ 128,000 (around 1979)
Commentary
Auto-reverse tape deck that can be mounted in an EIA-standard rack.
It uses a Oatley berth playback mechanism. If you use No. 7 long tape at 19cm/s, it can be played back and forth for a long time of 90 minutes without changing the tape. It can also be played endlessly by using both a counter repeat mechanism and a Oatley berth mechanism.
It is also equipped with a direction button that can be reversed at any point during playback.
Equipped with a lamp that shows the direction of travel.
The capstan drive motor uses an FG (frequency-controlled) AC servo direct drive motor with less drift due to temperature and time. 7,600kg-cm2High rotational accuracy is achieved by a structure in which a precisely processed motor shaft directly connected to a large flywheel with excellent dynamic balance and inertia energy functions directly as a capstan.
Two 6-pole inner rotor induction motors are used to drive the reel table to stabilize tape travel.
The tape transport mechanism uses a new tension roller mechanism to suppress tape vibration and stabilize the back tension.
Uses a direct change operation button with a built-in tape protection system.
In combination with a timer, you can record your absence.
A 4-head system is used for the head part, and a hard permalloy head is used for the recording and reproducing head.
The head amplifier has a dynamic range of 30 range of 30 dB from the reference level, and has good start-up and high-resolution sound quality.
Bias / equalizer Equipped with 2 independent switchable tape selectors for each.
It is equipped with a pitch control function that can be adjusted by ± 6%, and the tape speed can be changed during playback.
The 4-track, 2-channel specification allows you to record and right recording modes, allowing for monaural recording on either the L or R track alone, and sound-on-sound recording in which sound is superimposed on sound by changing the input / output connections.
Microphone and line mixing is possible.
It is equipped with a monitor switch and you can try listening by switching the sound of the tape and the source.
Equipped with a vertical L/R symmetrical type level meter for easy level monitoring.
Output volume is mounted on the rear panel.
Equipped with a quick rising pose mechanism.
Model Rating
Type | 4-track 2-channel stereo tape deck with reverse playback |
Head configuration | 4-track 2-channel 1 Recording Head Playhead x1 One Reverse Playhead Erase Head x1 |
Motor | For Capstan : FG Method AC Servo Direct Drive Motor x1 For Reel : 2 x 6 Pole Inner Rotor Induction Motor |
Max Reel | Reel 7 |
Tape speed | 19cm/s, 9.5cm/s, ± 0.5% |
Unwinding speed | No. 7 reel (370m), within 100 seconds |
Uneven rotation | 19cm/s : 0.05% or less (WRMS) 9.5cm/s : 0.08% or less (WRMS) |
Signal-to-noise ratio | 58 dB or more |
Distortion factor | 1% or Less (19cm/s) |
Frequency characteristic | 19cm/s : 20 Hz to 28 kHz (30 Hz to 24 kHz ± 3 dB) 9.5cm/s : 20 Hz to 20 kHz (30 Hz to 16 kHz ± 3 dB) |
Crosstalk | 50 dB or more |
Channel separation | 50 dB or more |
Erasure rate | 70 dB or more |
Recording bias frequency | 125kHz |
Equalizer | NAB Standard |
Operating system | Solenoid driven, push button direct change type Preset for timer recording and playback |
Input Sensitivity / Maximum Allowable Input / Impedance | Mic : 0.25mV/125mV/25k Ω, 6 mm φ Jack Line : 50mV/25V/100k Ω, Pin Jack DIN : 16mV/8V/1.3k Ω |
Output Reference Level / Maximum Output Level / Impedance | Line : 450mV/700mV/50k Ω, Pin Jack DIN : 450mV/700mV/50k Ω Phone : 70mV/8 Ω, 6 mm φ Jack |
Attachment mechanism | Pitch control Oatley Verse Playback (Sensing Tape Used / Manual Reversible) Auto-repeat (counter interlock) Recording Mode, L / r-independent Tape selector Bias (STD/LH) Equalizer (STD/LH) With Mic/Line Mixing Output volume (rear panel) Pose Display Lamp |
Semiconductor used | IC : 5 Transistor : 62 FET : 4 pcs Diode : 44 pcs Thyristor : 1 Varistor : 2 pieces Zener diode : 4 pcs LED : 2 pcs |
AC outlet | 300W, 1 system |
Pwer | 100 VAC, 50Hz/60Hz |
Power consumption | 100W |
External dimensions | Width 480x Height 230x Depth 356 mm |
Weight | 19.8kg |
Attachment | No. 7 metal reel Cleaning kit Splicing tape Sensing tape |