In
professional reel-to-reel tape recorders and in the most advanced
semi-professional machines 3 motors are taken for granted. Now Tandberg has
made a Hi-Fi cassette tape recorder which is the first in the world with 3
motors, with a very special tape transport system, with peak level meters and
with the Dolby B noise reduction system.
Features:
Specifications
better than requirements of DIN 45 500
Tape
transport system has 2 capstan and 2 pressure rollers (closed loop)
Amongst
other things this means that speed variations are reduced to a very low level.
Electronic
controls
High quality
magnetic heads
Large peak
level meters
Mixing in
mono
Automatic
stop
Can be used
in vertical position
For use with
separate Hi-Fi stereo amplifier
The Dolby B
System
The TCD310
has the Dolby noise reduction system. This reduces tape noise by about 10 dB
compared with conventional systems. The Dolby system is especially important in
a cassette tape recorder because the tape noise is higher than in a
reel-to-reel tape recorder. The Dolby system can be connected and disconnected
with a switch.
Tape
Selector
The magnetic
heads and the electronic circuits in the TCD310 were designed for maximum
exploitation of the best characteristics of the newest tapes. A selector allows
you to adjust the tape recorder to optimum for different types of tape.
Peak level
meters
These
provide the best method of controlling a recording. The meters can also be used
to indicate the replay level.
The Tape
Transport
In a tape
recorder it is a big advantage if the number of moving parts is reduced to a
minimum. All mechanism sooner or later wear out, and complicated clutch systems
and mechanical linkages contribute to a worsening performance. This is
particularly true for cassette machines because the cassette's construction
gives narrow tolerances for high quality sound reproduction.
Even heavily
worn cassettes will not be damaged in the TCD310 because it has a built-in
safety device that automatically stops the tape-drive if the tape is jammed.
The
dual-capstan closed-loop system consists of 2 capstan with precision flywheels
and 2 pinch rollers. This provides a stable tape path with minimum speed
variations. The mechanism is simple and solid giving a reliable performance.
The tape transport system provides the correct tape tension across the magnetic
heads and cancels irregularities in the sound level caused by the pressure pad
in the cassette. During record/play nad fast wind/rewind the driving mechanism
is automatically disconnected at the end of the tape.
3 Motors
The TCD310
has one synchronous motor for record/replay and two motors for fast forward and
backward winding. These two motors are in direct contact with the spool
spindles. This ensures that the number of moving parts is reduced to a minimum,
and there is no complicated mechanical transmission that could eventually wear
and reduce the performance of the machine. The spooling speed is high and it
only takes about 40 seconds to spool a C60 cassette.
Self-Adjusting
Input Amplifier
This novel
self-adjusting input amplifier was specially designed at Tandberg Radiofabrikk.
While conventional input amplifiers are optimised to a particular programme
source and are often badly matched to other programme sources, this amplifier
adjust itself automatically to different programme sources (radio, record
player with ceramic pick-up, amplifier, microphone). The result is something
that cannot be achieved with conventional amplifiers; a full dynamic range and
the absolute minimum noise from the input circuits - regardless of which
programme source and which recording level are used.
Specifications:
Tape
Speed: 1-7/8 i.p.s.
Speed
Tolerance: ±1,0%
Wow and
Flutter: 0,2% (peak DIN 45 511); 0,15%
(WRMS)
Frequency
Response (DIN 45 500): 30 - 16,000 Hz
(40 - 14,000 Hz ±3 dB)
Signal-to-Noise
Ratio: 65 dB (weighted, DIN 45 500); 55
dB (unweighted , DIN 45 500)
Crosstalk
Attenuation:
Side 1 to
side 2 : 60 dB
Track 1 to
track 2 : 35 dB
Harmonic
Distortion: 0,3%(from amp. At 0 dB); 3%
(from tape at 0 dB record level)
Input
Sensitivity/Impedance (max. Voltage at 400 Hz)
Mic : 0,15
mV - 20 mV
Line :
40 mV - 5 V/ 220 k Ω
Radio
: 8 mV-1 V/47 k Ω
Output
Voltage/Load Impedance (with unlouded output or power output for each channel)
Radio
: 0,775 mV/10 k Ω
Line :
0,775 V/10 k Ω
Power
Requirements: 115 V, 230 V, 50 or 60 Hz
Power
Consumption: 34 W
Dimensions
(W x H x D): 430 x 105 x 230 mm (17 x
4-1/4 x 9-1/4 inches)
Weight: 6,5 kg (15,5 lb)