Pioneer CT-910 3-Head Stereo Cassette Deck

Description

The tape recorder was brought from Japan and the power was converted to 220/240 Volt voltage.
The device works well, the belts are changed.
The device is almost 40 years old so the sale is without warranty. Return is not accepted.
You must understand me.
Shipping outside the EU costs $ 200.
Worldwide shipping is limited due to COVID.
Before making a purchase, you should find out about the delivery to your country.
Pioneer CT-910
¥ 99,800 (around 1979)
Commentary
A stereo cassette deck that uses a 3-head system.
A 3-head system with dedicated heads for recording, playback, and erasing is adopted, and by thoroughly pursuing recording characteristics and playback characteristics from each standpoint, high sound quality that could not be obtained with the recording / playback combined head system was obtained. Is realized.
In order to effectively realize 3 heads in a cassette deck in CT-910, the combination head which packaged the individually made sound-recording head and the play head in one case is adopted.
As a result, the gap parallelism of both heads is kept constant, and the worry of azimuth shift and crosstalk is prevented.
Moreover, the center mask is provided between two heads to prevent magnetic interference, and the head touch is also improved.
The sendust alloy originally developed by Pioneer is adopted as the head core of a sound-recording head and a play head.
This has improved wear resistance, distortion factor characteristic at the time of high input, and high frequency, and has suppressed the adhesion of magnetic powder and dust, and the generation of noise by magnetism.
The closed loop dual capstan system which arranged two capstans is adopted as a mechanism part.
In this method, the tape tension running between both capstans is always kept constant, so that the head touch is extremely good, and not only dropout and level fluctuation but also modulation noise due to tape vibration is prevented.
The two-motor system which adopted the electronically controlled DC servomotor with a built-in generator for constant speed and DC high torque motor for fast forward is adopted as a drive part.
Equipped with an ATLC mechanism that instantly removes slack in the tape when the cassette half is attached.
The FL level meter is carried.
The level display uses 20 segments per channel and is designed to cover -20 to +7 dB.
In addition, the most important level monitoring, -4 to +7 dB, uses one segment for each 1 dB, and it is easy to perform level monitoring by displaying two colors that light blue for less than 0 dB and orange for 0 dB and above. doing.
In addition to displaying the average, this FL meter is a three-stage switching type that can switch the response characteristics to peak and peak hold under the control of the microprocessor.
The multipurpose memory mechanism which applied a microprocessor is carried.
The CT-910 uses an FL counter that inputs the rotation speed detection pulse of the reel stand to the microprocessor and displays a 3-digit digital display.
In addition, operations such as memory stop, memory play, and counter repeat can be performed by the end repeat function and the memory control function of the microprocessor.
The bias adjustment mechanism is carried and the adjustment can be performed according to the characteristic of the tape to be used.
The full open loading method is adopted, and it can be surely attached to the cassette half.
It also comes with a dust protector that covers the head housing.
The pure electronic control system by the logic circuit is adopted as an operation part, and it can move to the next operation directly from any position.
The CrO2 position automatic switching mechanism is carried.
STD and Fe-Cr can be switched manually.
The Dolby system is carried as a noise reduction system.
The timer start button is carried, and the absence recording and the wake-up play are possible in conjunction with the timer.
The input selector which can switch the input of a line and a microphone is carried.
It can be mounted on an EIA standard rack by adopting an optional rack mount adapter.
Model rating
Model
Cassette deck
head
Recording: Sendust Head
Playback: Sendust Head
Erase: Ferrite Head
motor
For constant speed drive: Electronically controlled DC servo motor For
reel drive: DC high torque motor
Rotation unevenness
0.04% or less (WRMS)
Frequency characteristic
General, LH tape: 20Hz-17kHz / 30Hz-15kHz ± 3dB
Ferrichrome tape: 20Hz-19kHz / 30Hz-17kHz ± 3dB
Chrome tape: 20Hz-19kHz / 30Hz-17kHz ± 3dB
SN ratio
Dolby OFF: 54dB or more (general / LH tape)
Dolby ON
: 64dB or more (5kHz or
more, general / LH tape)
* Further improvement of
4.5dB (5kHz or more)
when using chrome tape
Distortion rate
1.3% or less (0 dB)
Operation unit
Full logic control
direct change method
(feather touch button)
Input
(Sensitivity / Maximum Allowable Input / Impedance)
Mic: 0.3mV / 100mV / 30kΩ, 0.6mmφ jack
(compatible impedance 250Ω to 30kΩ)
Line: 60mV / 25V / 100kΩ, pin jack
Output
(reference level / maximum level / impedance)
Line: 450mV / 640mV / 50kΩ, pin jack
headphones: 63mV / 90mV / 4-16Ω, 6mmφ stereo jack
Attached functions
Dolby system (with LED display)
Tape selector (STD, Fe-Cr, CrO2, with LED display)
CrO2 automatic switching mechanism
Bias variable mechanism
Monitor switch (tape / source switchable)
2-color FL meter (peak / peak hold / average switching) Formula)
FL counter
automatic tape slack removal mechanism (ATLC)
memory stop / play
counter repeat / end repeat
timer standby mechanism
input selector (Line / Mic)
output volume
cassette rear lighting lamp
Semiconductor used
IC: 13
Transistors: 67
Diodes: 57
Zener diodes: 7
LEDs: 9
Power supply
AC100V, 50Hz / 60Hz
power consumption
44W
External dimensions
Width 420 x Height 187 x Depth 368
mm Width 480 x Height
187 x Depth 368
mm (when JA-R102 is installed)
weight
10.1kg