Tandberg TR-1040 receiver

The FM Receiver

The FM receiver has MOSFET transistors giving good reception for weak and strong stations. Extra linear phase response and high selectivity with 4-pole ceramic filters. A good performance is obtained from the integrated IF amplifier and detector. The FM stereo decoder has integrated circuits that include a phase-locked-loop oscillator giving good channel separation over the complete frequency range. The stereo decoder has automatic or manual change-over between mono and stereo. Active filters remove the stereo systems pilot tone and auxiliary carrier wave. Precise tuning is easy with the two large tuning meters, a big advantage, especially with stereo transmissions. The FM receiver is equipped with a muting circuit that removes inter-station noise.

 

Power amplifier

The amplifier has been designed to handle extremely heavy loads. Automatic protection circuits keep watch over it constantly. tR-1040 has a direct coupled, short-circuit proof output stage. Complementary output transistors give very low distortion. An electronic controlled relay protects the loudspeakers from accidental d.c. damage. Automatic thermal protection disconnects the amplifiers if they are overheated (from bad ventilation) and connects them again immediately the temperature has fallen.

 

Pre-amplifier

The pre-amplifier is designed for a transcription unit or record player with a magnetic pick-up. All the inputs are adjustable. Three effective filters (1 Low and 2 High) attenuate disturbing noise from program sources. An extra refinement is the separate bass and treble controls for each channel which permits equalization for bass and treble differences resulting from asymmetrical positioning of loudspeakers.

 

Specifications

Audio Section

Power Output:  average continuous sinewave power is 40 watts minimum rms per channel, both channels driver into 8 ohms load, from 20 to 20,000 Hz with no more than 0,2% t.h.d from 1/4 watt to 40 watts as specified herein.

Total Harmonic Distortion :maximum 0,2% at any power from 1/4 watt up to rated power.

Intermodulation Distortion:  0,2%

Damping Factor:  50 at 8 Ω , 20 - 20,000 Hz

Frequency Range:  Linear inputs from 7 to 70,000 Hz (-1,5 dB)

Controls

Treble :  ±15 dB at 10,000 Hz

Loudness Comp. : +7 dB at 10,000 Hz

Bass :  ±16 dB at 50 Hz

Loudness Comp. : +12 dB at 50 Hz

Low Filter:  -3 dB at 70 Hz (-12 dB /oct.)

High Filer 1 :  -3 dB at 8000 Hz (-12 dB/octave)

High Filter 2 :  -3 dB at 8000 Hz (-6 dB /octave)

Channel Separation: 

Phono :  52 dB (at 1 kHz)

Tape :  56 dB (at 1 kHz)

Signal-to-Noise Ratio (IHF)

Phono :  68 dB

Tape 1, 2 :  82 dB

Sensitivity:

Phono :  1,8 to 6,0 mV

Tape 1, 2 :  130 to 500 mV

Main Amplifier Sensitivity:  200 mV

Input Impedance :  10 k Ω

Outputs

Tape 1 and Tape 2 Outputs (Unloaded)

DIN Socket :  200 mV

Phono Socked :  1 V

Pre-Amplifier Output:  1 V / 1 k Ω 

FM Section

Tuning Range:  87,5 to 108 MHz

Sensitivity IHF:  2,0 µV at 300 Ω

50 dB Quieting:  3,5 µV at 300 Ω

Selectivity:

Carrier down (alternate channel) 100 dB at ±400 kHz

IHF Dynamic (alternate channel) 80 dB at ±400 kHz

Carrier Down  (adjacent channel) 40 dB at ±200 kHz

IHF Dynamic  (adjacent channel) 10 dB at ±200 kHz

Spurious Response:  better than 95 dB

Capture Ratio (at 1 mV ant. volt, selectively measured):  0,9 dB

Total Harmonic Distortion (at 100% modulation)

Mono :  0,2%

Stereo :  0,3%

Channel Separation (at 100 Hz to 10,000 Hz, selectively measured):  better than 40 dB

Pilot Tone Suppression: better than 68 dB

38 kHz Suppression:  better than 60 dB

SCA Suppression: better than 70 dB

General:

Main Voltage:  120 V (Internal Connections for 120/220/240 V ) 50/60 Hz

Dimensions (W x H x D):  440 x 132 x 310 mm (17-1/2" x 5-3/16" x 12-1/4") + knobs 20 mm (3/4")

Weight:  9 kg (20 lbs)

 

Tandberg Fasett loudspeakers

Living Sound Fasett - new concept in loudspeakers

With the Tandberg Fasett all the advantages of direct and indirect sound distribution can be exploited. In the concert hall the sound flows out from the instruments in all directions. It spreads out in the room, partly beamed directly at the listeners and partly reflected as indirect sound from the walls, ceiling and floor. the total sound in a concert hall is therefore a combination of direct and indirect  sound. the strength of the indirect sound in comparison with the direct sound depends upon the hardness of the reflecting surfaces - the walls, ceiling and floor. The sound reflected from a hard surface (glass, concrete) is stronger than the sound reflected from a soft surface (curtains, perforated tiles). With the Fasett this living "sound picture" can be re-created in the home.

 

Play with sound

Tandberg stereo-amplifiers have outputs for 4 loudspeakers (two for each channel in the stereo installation). When these 4 outputs are exploited with 4 loudspeakers, the "sound picture" can undergo a distinct improvement both in mono and stereo. With 4 loudspeakers it is possible to experiment with a combination of direct and indirect sound. The Fasett is shaped so that it can be tilted and turned to many positions. If two loudspeakers  are beamed directly towards the listeners, the other two can be directed to the side;  the back or upwards against, for example, a hard wall or a ceiling. These two loudspeakers will provide the indirect sound.

 

Technical Terms Bass Reflex

The Fasett employs a principle known as bas reflex. Simply explained it means that the sound radiating from the back of the loudspeaker cone is directed through a tuned duct so that it radiates from the front. It thereby boosts the ordinary radiations from the front of the cone. In this way the bass response in a limited tone region is reinforced. A further advantage resulting from this principle is reduced distortion. Be aware that the siting of a loudspeakers in a room also affects the strength of the sound in the bass region.

Sensitivity

An expression for the electrical power (operating power) that must be applied to the loudspeakers to reach a sound level of 96 dB (loud orchestra level) at a distance of 1 metre.

Maximum continuous power

The power that can be continuously delivered to a loudspeaker system without causing damage as a result of a high temperature in the voice coil.

Music Power

The power that can be delivered to a loudspeaker (a loudspeaker system) for a very short time interval without unduly raising the temperature or the distortion.

 

Specifications

Frequency Range:  50 - 20,000 Hz (DIN 45 500)

Resonant Frequency:  85 Hz

Sensitivity:  6 watts (DIN 45500)

Max. Continuous Power:  25 watts (DIN 45500)

Music Power:  40 watts (DIN 45500)

Impedance:  8 - 4 Ω

Complement:

1 x 5" bass loudspeaker

1 x 2-1/4" treble loudspeaker

Enclosure Volume:  6,5 liters

Dimensions (W x H x D):  280 x 242 x 220 mm (11" x 9-1/2" x 8-3/4")

Tandberg Huldra 10

 Huldra, a leading model with a name full of tradition in the Norwegian radio industry. This is the tenth model bearing this illustrious name: 6 wavebands; powerful stereo amplifier and many refinements making it a very advanced receiver. The  Huldra is a top quality product.

 Features:

FM, longwave, mediumwave, and 3 shortwave bands;

Large, open-scale;

FM stereo decoder;

Pre-tuning for 4 FM stations;

FM muting;

FM receiver with MOSFET transistors, 4-pole ceramic filters and integrated circuits;

AM receiver with MOSFET input stage;

Stereo power amplifier with 2 x 25 watts sine wave output power in 8 ohms;

Frequency/Loudness compesated volume control;

High and Low filters;

Connections for a record player (magnetic or ceramic pick-up) anda tape recorder. In addition connection for an extra programme source;

Front output for stereo headphones.

 The FM Receiver

The most important characteristic with a receiver is good sensitivity. The FM receiver in the Huldra is based on field-effect transistors (MOSFETs) and integrated circuits; these ensure very good sensitivity and at the same time provide good protection against strong, interfering, nearby stations. The receiver also includes new ceramic filters providing good selectivity and low distortion. The stereo decoder has integrated circuits with a phase-locked-loop oscilator which gives high channel separation and low distortion with reproduction of stereo transmissions. With the two tuning meters it is easy to tune in the stations precisely.

 The AM Receiver

The 3 shortwave bands cover the entire international shortwave spectrum. There is a built-in antenna for longwaves and mediumwaves. In addition the receiver has special features; six tuned circuits in the intermediate frequency amplifier provide good selectivity. Field-effect transistors also play their part in the AM receiver. The Huldra 10 has such good sensitivity that even very weak stations can be pulled in, but it also tolerates signal from strong stations. A special filter reduces disturbing whistles caused by adjacent stations.

 Power Amplifier Section

There are many advanced refinements that go towards making Huldra a special receiver. The power amplifier, for example, has a fully complementary output stage giving very low crossover distortion - clean sound. An "electronic protection circuit" prevents damage if the loudspeakers should be accidentally short-circuited. There is a balance control and common volume control for both channels. The loudness compensation on the volume control can be disconnected.

Huldra 10 has two very good filters (High and Low) that reduce noise from programme sources (hiss or rumble). The pre-amplifier is corrected for a magnetic pick-up, (RIAA) with a switch for adjustment for a ceramic pick-up.

Recommended loudspeakers for the Huldra

There are three Tandberg speakers particularly suitable for the high quality amplifier in the Huldra 10. first we recommend the TL-2520, a 3-way 25 litre hi-fi system giving excellent reproduction from 45 to 20,000 Hz. An alternative is a larger model, the TL-3520.

Specifications

Amplifier Section

Output Power

Per channel, sine wave, with 1 kHz in 8 Ω (4 Ω):  28 W (38 W) Both channels driven simultaneously DIN 45500

Per channel , sine wave, from 20 to 20,000 Hz in 8 Ω:  25 W   Both channels driven simultaneously. 0,3% Distortion

Distortion (with output power 1 dB below nominal and lower at 1 kHz in 8 Ω (4 Ω):  0,1% (0,15%)

Intermodulation (according to DIN 45 500):  0,6%

Damping Factor (nominal output power in 8 Ω (4 Ω):  60 (35) 20-20,000 Hz

Frequency Response (from linear inputs (-15 dB): 15 - 50,000 Hz

Channel Separation (at 1 kHz minimum):  60 dB

Tone Controls: 

Treble  Control at 10 kHz : ±15 dB

Frequenzy/Loudness at 10 kHz : +7 dB

Bass Control at 50 Hz : ±16 Hz

Frequency/Loudness at 50 Hz : +12 dB

Low Filter -12 dB/oct, -3 dB at 75 Hz

High Filter  -12 dB/octave, -3 dB at 7 000 Hz

Input Sensitivity (nominal  output power in 8 Ω):

Tape 1 : 280 mV

Tape 2 (Extra) : 280 mV

Phono 1  Magn. (cer) : 2,4 - (72 mV)

Signal-to-Noise Ratio (2x50W in 8 Ω according to DIN 45 500):

Tape 1 : 60 dB

Tape 2 (Extra) : 60 dB

Phono 1 : 60 dB

Tuner FM Section

Wave Band:  87,5 - 108 MHz

Frequency Response (-3dB):  20 - 15,000 Hz

Sensitivity in Mono (for 26 dB S/N according to DIN 45 500 with 75/300 Ω aerial impedance):  0,8 µV/1,6 µV

Sensitivity in Stereo (for 46 dB S/N according to DIN 45 500 with 75/300 Ω aerial impedance):  20 µV/40 µV

Signal-to-Noise Ratio (with 1 mV aerial voltage):

Unweighted (according to IHF),  Stereo/Mono : 66/68 dB

Weighted (according to DIN), Stereo/Mono : 54/58 dB

Unweighted (according to DIN) , Stereo/Mono : 61/63 dB

Distortion (according to DIN), Stereo/Mono :  0,4%/0,2%

Selectivity (according to IHF), ±400 Hz :  80 dB

Image Frequency Rejection Ratio:  70 dB

AM suppression:  50 dB

IF Rejection:  95 dB

Limiting (-3dB) with 75 Ω aerial impedance:  0,7 µV

Muting Thereshold with 75 Ω aerial impedance:  1,5 µV

Capture ratio:  1,5 dB

Channel Separation (accor. to DIN 45 500):  40 dB

Pilot Tone Suppression (accor. to DIN 45 500):  35 dB

38 kHz Suppression (accor. to DIN 45 500):  50 dB

AM Section

Wave Bands

Long wave :  150 - 268 kHz

Medium wave :  518 -1600 kHz

Short wave [ I / II / III]:  3,3 - 10 MHz / 10 - 20 MHz / 20 - 30 MHz

Selectivity at 1 MHz (±9 kHz):  43 dB

Distortion with 30% modulation:  1%

Sensitivity at 1 MHz (30% mod. and 20 dB S/N):  50 µV

General

Wood Finish Veneers:  Teak or Rosewood ( Oak, Walnut to order)

Main Voltage:  220/240 V (alt.115 -230 V) 50/60 Hz

Dimensions (W x H x D):  535 x 120 x 305 mm (21" x 4-3/4" x 12") without knobs

Weight:  8,2 kg (18 lbs)

Tandberg Sølvsuper 12 /12C

 Tandberg Sølvsuper - the best selling table receiver in Norway. You can now buy this famous model with a biult-in stereo cassette tape recorder as the Sølvsuper 12C. The cassette tape recorder has a microphone input, manual level controls for recording, and LED record level indicators. There are many reason why the Sølvsuper has become so popular. First of all its reliability. Then good design and a clean simple layout for the operating controls. Teh Sølvsuper 12 has the same quality features as its 11 predecessores. To obtain full enjoyment from it you ought to have loudspeakers that do it justice.

Features

FM stereo, long wave, medium wave, and short wave;

FM stereo tuner with built-in decoder, ceramic filters and integrated circuits;

Muting (no noise between atations) and AFC (automatic frequency control)

Powerful stereo amplifier. Sine wave output power 2 x 15 watts in 8 ohms, or 2 x 20 watts in 4 ohms

Frequency/Loudness compensated volume control;

Can be connected to a record player with ceramic or magnetic pick-up and a tape recorder;

Front jack for stereo headphones

 The Receiver

The stereo decoder in the FM tuner has integrated circuits and a light diode on scale automatically comes on when there is a stereo transmission. The FM tuner has ceramic filters that discriminate well between stations. This is a big advantage especially where two stations lie close together in the band. The muting circuit, which cuts out noise between FM stations, acn be connected and disconnected.

The High Quality Stereo Amplifier

The stereo amplifier has a great many valuable features. The volume control is common to both channels and  the balance between the channels can be changed by a balance control. There are very effective separate bass and treble controls. The volume control is frequency/loudness compensated. This means that it automatically corrects for the falling frequency response of the human ear at low volumes.

 Sølvsuper 12C - The Cassette Model

The Sølvsuper 12C has the same tuner and amplifier sections as the model 12. in addition it has a very good built-in cassette tape recorder for record and playback of programmes from radio, record player, microphone or another tape recorder. The traditional record level meters have been replaced with light emitting diodes for indicating the peak recording level. This is a very safe measurement technique. LED's have an almost unlimited life.

The Sølvsuper as the central unit in a Tandberg Music Centre.

Most people who own a Sølvsuper use it as the central unit in a music centre. This enables all the facilities of the stereo amplifier to be fully exploited. The Sølvsuper 12 can be connected to a tape recorder, a Tandberg 3500 Stereo for example, and a record player witha magnetic or ceramic pick-up. The Sølvsuper has 4 speaker outputs 92 for each channel)> this means that the music centre can consist of 2 or 4 Tandberg loudspeakers located together or in two separate groups.

Specifications

Amplifier Section

Output Power

Per channel, sine wave, with 1 kHz in 8 Ω (4 Ω):  17 W (22 W) Both channels driven simultaneously DIN 45500

Per channel , sine wave, from 20 to 20,000 Hz in 8 Ω:  12 W   Both channels driven simultaneously. 1% Distortion

Distortion (with output power 1 dB below nominal and lower at 1 kHz in 8 Ω (4 Ω):  0,2% (0,3%)

Intermodulation (according to DIN 45 500):  0,5%

Damping Factor (nominal output power in 8 Ω (4 Ω):  30 (15) 20-20,000 Hz

Frequency Response (from linear inputs (-15 dB): 30 - 25,000 Hz

Channel Separation (at 1 kHz minimum):  60 dB

Tone Controls: 

Treble  Control at 10 kHz : ±15 dB

Frequenzy/Loudness at 10 kHz : +4 dB

Bass Control at 50 Hz : ±16 Hz

Frequency/Loudness at 50 Hz : +5 dB

Input Sensitivity (nominal  output power in 8 Ω):

Tape  : 150 mV

Phono   Magn. (cer) : 2,5 - (75 mV)

Signal-to-Noise Ratio (2x50W in 8 Ω according to DIN 45 500):

Tape  : 55 dB

Phono  : 55 dB

Tuner FM Section

Wave Band:  87,5 - 108 MHz

Frequency Response (-3dB):  20 - 15,000 Hz

Sensitivity in Mono (for 26 dB S/N according to DIN 45 500 with 75/300 Ω aerial impedance):  1,0 µV/2,0µV

Sensitivity in Stereo (for 46 dB S/N according to DIN 45 500 with 75/300 Ω aerial impedance):  40 µV/80 µV

Signal-to-Noise Ratio (with 1 mV aerial voltage):

Unweighted (according to IHF),  Stereo/Mono : 66/68 dB

Weighted (according to DIN), Stereo/Mono : 54/58 dB

Unweighted (according to DIN) , Stereo/Mono : 61/63 dB

Distortion (according to DIN), Stereo/Mono :  0,5%/0,3%

Selectivity (according to IHF), ±400 Hz :  55 dB

Image Frequency Rejection Ratio:  46 dB

AM Suppression:  48 dB

IF Rejection:  90 dB

Limiting (-3dB) with 75 Ω aerial impedance:  0,7 µV

Muting Thereshold with 75 Ω aerial impedance:  2,0 µV

Capture ratio:  1,5 dB

Channel Separation (accor. to DIN 45 500):  40 dB

Pilot Tone Suppression (accor. to DIN 45 500):  50 dB

38 kHz Suppression (accor. to DIN 45 500):  50 dB

AM Section

Wave Bands

Long wave :  150 - 268 kHz

Medium wave :  518 -1600 kHz

Short wave :  5,8 - 18,5 MHz

Selectivity at 1 MHz (±9 kHz):  40 dB

Distortion with 30% modulation:  1%

Sensitivity at 1 MHz (30% mod. and 20 dB S/N):  50 µV

Cassette Tape Recorder

Speed Tolerance:  ±1% max. (DIN 45500)

Speed Variations:  0,25% max. (peak weighted)

Frequency Range:  45 to 13,000 Hz (DIN 45511)

Signal-to-Noise Ratio:  greater than 47 dB (DIN 45405)

General

Wood Finish Veneers:  Teak or Rosewood ( Oak, Walnut to order)

Main Voltage:  220/240 V (alt.115 -230 V) 50/60 Hz

Dimensions (W x H x D): 

Sølvsuper 12 :  495 x 117 x 240 mm (19-1/2" x 4-3/4" x 9-1/2") without knobs

Sølvsuper 12 C :  645 x 115 x 240 mm (25-1/2" x 4-5/8" x 9-1/2")

Weight: 

Sølvsuper 12 :  5,8 kg (12,5 lbs)

Sølvsuper 12 C :  8,2 kg (18 lbs)

Tandberg TCD 330

 The TCD330 is the top model in the Tandberg range of cassette tape recorders and in many ways compares favourably with open reel machines; 3 heads, source abd tape tests, editing facility, 3 motors, completely electronic controlled, remote control, servo controlled winding, dual-capstan closed-loop tape path, and dual Dolby.

Features:

Stable tape transport. Full control over tape movement with exceptionally gentle tape handling.

Memory function.

Tandberg developed input circuits, optimized for minimum noise regardless of source impedance.

Peak indicating meters - the only correct way to measure sound level after equalization. Also indicate playback level.

Editing facility.

Decoder for recording Dolbyized FM programmes.

Built-in MPX filter.

Matched to all types of good quality tape.

Adjustable output level.

Automatic stop for wind and rewind.

Front jack for stereo headphones.

The TCd330 is delivered in teak or rosewood,( oak or walnut to order)

 Tandberg was the first company in the world to design a cassette tape recorder with a combination of 3 motors and an advanced tape transport called the dual-capstan closed-loop system. On the TCD330 we have taken the development a stage further and included professional features and facilities normally found only on the most advanced open reel machines. This means that with the TCD330 Tandberg is setting new standards with the application of advanced technology, professional facilities and a professional performance for cassette machines.

3 Heads. Source and tape tests as you record.

This facility has been normal on open reel machines for many years, but it has been missing on cassette machines. Teh TCD330 has separate record and playback heads placed in the tape path where they enable you to listen to the recording as it takes place, but a fraction of a second after it has been recorded (tape test). With this facility we have fully expolited the advantage of 3 separate heads located in the correct places.

 Completely Logic Controlled.

All the operational modes are logic controlled - including even the cassette eject mechanism. The control system is an "electronic brain" with integrated circuits. This corresponds to several hundred transistors and provides a very compact and reliable design. Regardless of how you use the mode buttons, the "electronic brain" always ensures that the tape flows smoothly and is not damaged. The TCD330 has 3 motors controlled by electronics. The two reel motors are connected directly to the reel spindles while the third motor controls the capstans. The number of moving parts has been reduced to a minimum - a big advantage because all mechanism sooner or later wear out and need adjusting or replacing. The advantages with electronic control of teh TCD330 are first and foremost, no mechanical time delays between operational modes and second, all operation times are minimal.

Rapid Servo-controlled Winding.

The TCD330 winds and rewinds rapidly and has an automatic electronic servo-system controlling the wind/rewind speed. The design problem is that the tape can easily be streatched at the ends if the speed and winding power are too great. We solved this problem by automatically reducing the speed as the tape gets near the end. So the tape speed is always correct an the tape is never exposed to powerful tugs when it stops.

 Azimuth Adjustable on record Head.

The critical stage in the recording process is where the tape crosses the record head. Correct reproduction of the highest tones is very dependent on the angle between the tape and the head face. The angle must by 90° to achieve the best performance. A 10° error will give 6 dB loss at 15 kHz, and 15° error will give 6 dB loss at 10 kHz.

The tape path is always slightly different from one cassette to another because of small deviations in cassette construction. So the tape/head angle will not always be 90°. The TCd330 has a simple, built-in head - angle adjustment facility that allows you to set the head exactly to 90° for any cassette. So you get the best results from every cassette.

 Editing Facility.

Another important advantage with the TCD330. because you can go over directly from playback to record without going via stop, you can edit tapes and clean-up recording overlaps in a simple, precise way without clicks.

The Dolby B Circuits.

The TCD330 Dolby B circuits are used for normal record and playback operations and to record so-called "Dolbyized FM programmes" in stereo. Increasingly more countries are transmitting stereo programmes on FM using Dolby noise reduction systems.  These programmes are virtually free from hiss at the transmitter. But to take advantage of this improvement in the programme quality and to restore the correct frequency response the reproducing equipment must include a Dolby decoder. The decoder can be either in the radio receiver or in the tape recorder. With the Dolby N.R. button in the position "FM" the TCd330 acts as a decoder.

Specifications:

Tape Speed:  1-7/8 i.p.s.

Speed Tolerance:  ±05%

Wow and Flutter:  0,18% (peak DIN 45 511); 0,12% (WRMS)

Frequency Response (DIN 45 500):  20 - 20,000 Hz (30 - 18,000 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 : 80 mV - 10 V/ 470 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/5 k Ω

Line : 1,5 V/0,1 k Ω

Headphones : 5 mV/8 Ω

Power Requirements:  115 V, 230 V,  50 or 60 Hz

Power Consumption:  40 W

Dimensions (W x H x D):  470 x 105 x 230 mm (18-1/2 x 4-1/8 x 9-1/8 inches)

Weight:  6,6 kg (14,5 lb)

Tandberg TCD 310

 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)

Tandberg TR-2075

 Very powerful amplifiers can degrade tuner and preamplifier performance. So separate components became the rule and -for years- the rule made sense. But now we,ve found ways to break the rule and build a very high-powered receiver with better performance for less cost than comparable separate components. We started with a high power toroidal transformer to eliminate stray electrical influence on other components within the unit. An expensive device not usually found in consumer products it offers superior stability and performance.

The transformer feeds two powerful amplifiers. They have a wide frequency range for transparent sound. Ample overload margin for low distortion. And true complementary, direct-coupled circuits. Four protective circuits help deliver this exceptionally clean high power safely to your speakers.

TR-2075 has separate preamplifiers for each input to keep low level signals noise-free. And sensitivity controls to equalize listening levels (First stages of amplification occur within millimeters of signal input. An expensive but effective way to achieve low noise and clean sound)

 The FM Section Features

MOSFET transistors, 4-pole ceramic filters and integrated circuits (IC's).

Automatic switchover to FM stereo with illuminated indicator.

Electronic tuning. Heavy flywheel making tuning a pleasure.

Muting for quiet tuning.

Large tuning and signal strength meters for spot-on tuning.

FM 25 µs de-emphasis switch for use with external Dolby decoder when receiving FM Dolby broadcasts.

The AM Section Features

2 MOSFET transistors in the HF stage and the mixer provide equally good reception with strong and weak aerial signals.

2 tuned RF circuits mean that the signal/noise ratio is excellent and the image frequency rejection ratio is greater than 90 dB.

The Audio Section Features

Extremely low distortion

2 inputs for transcription units, one with adjustable sensitivity. Large dynamic range.

2 inputs for tape recorders with adjustable sensitivity. Large dynamic range and Tape Monitor facility.

Copying facilities for 2 tape recorders

Output for tone-controlled programme

3 tone controls for each channel

3 filters, 2 high an 1 low. Steep slopes.

2 front output jacks for stereo headphones

Automatic protection against all kinds of overload.

Recommended speakers; Tandberg Studio Monitor 

 Push button electronic time delayed diode switching provides noise-free blends when changing program sources. This innovation allows us to put the controls in the best position for easy operation and the electronics where they can deliver the best performance. Independent tape-to-tape facilities add to the extreme versatility of TR-2075.

TR-2075 also offers electronic FM tuning for stability and long life. Phase-locked loop decoding for superb stereo separation. And phase linear filtering for low distortion. (Just a few of the reasons why this FM tuner/IF circuitry equals - or excels - any we know)

Large Tuning Meters

The TR-2075 has two tuning meters: the signal strength meter gives full scale deflection for strong aerial signals (200 mV). This meter also has a scale for indicating audio output power. The centre-zero meter makes it easy to tune-in FM stations spot on and is particularly important for stereo transmissions.

 Tape Monitor and Tape Copy

Both tape recorder inputs have a Tape Monitor facility permitting source and tape testing during recording. The Tape Copy facility allows copying in both directions between two tape recorders connected to the TR-2075. Copying can take place without affecting any other programme that is going to the loudspeakers.

Separate Output/Input Amplifier Section

The pre-amplifier and the power amplifier can both be used as separate units. At the back of the TR-2075 there are phono sockets for the input and output of each channel. This means you can connect the pre-amplifier to another amplifier or to other hi-fi unit. In the same way the power amplifier in the TR-2075 can be used independently.

Highly Efficient Ferrite-Rod Aerial

The Am aerial is situated at the back of the receiver and can be rotated through 270° to the best position for reception. The TR-2075 also has sockets for outdor aerials for  FM and AM.

Specifications

Amplifier Section

Output Power per channel, sine wave, with 1 kHz in 8 Ω /4 Ω:   95 W /120 W.   Both channels driven simultaneously DIN 45500

Output Power per channel , sine wave, from 20 to 20,000 Hz in 8 Ω:   75 W.   Both channels driven simultaneously. 0,15% Distortion

Distortion (with output power 1 dB below nominal and lower at 1 kHz in 8 Ω (4 Ω):  0,08%

Intermodulation (according to DIN 45 500):  0,15%

Damping Factor (nominal output power in 8 Ω (4 Ω):  60 (30) 20-20,000 Hz

Frequency Response (from linear inputs (-15 dB):  6 - 80,000 Hz

Channel Separation (at 1 kHz minimum):  60 dB

Tone Controls: 

Treble  Control at 10 kHz : ±15 dB

Frequenzy/Loudness at 10 kHz : +3 dB

Mid-Frequency Range at 1 kHz : ±7 dB

Bass Control at 50 Hz : ±15 Hz

Frequency/Loudness at 50 Hz : +8 dB

Low Filter -12 dB/oct, -3 dB at 70 Hz

1 High Filter  -12 dB/octave, -3 dB at 8 000 Hz

2 High Filter -6 dB/octave, -3 dB at 8 000 Hz

Input Sensitivity (nominal  output power in 8 Ω):

Tape 1 : 150 - 600 mV

Tape 2 (Extra) : 150 - 600 mV

Phono 1  Magn. (cer) : 2,2 - 10 mV

Phono 2 Magn. (cer.) : 3,0 mV

Signal-to-Noise Ratio (2x50W in 8 Ω according to DIN 45 500):

Tape 1 : 62 dB

Tape 2 (Extra) : 62 dB

Phono 1 : 60 dB

Phono 2 : 58 dB

Tuner Fm Section

Wave Band:  87,5 - 108 MHz

Frequency Response (-3dB):  20 - 15,000 Hz

Sensitivity in Mono (for 26 dB S/N accor. to DIN 45 500 with 75/300 Ω aerial impedance):  0,8 µV/1,6 µV

Sensitivity in Stereo (for 46 dB S/N accor. to DIN 45 500 with 75/300 Ω aerial impedance):  20 µV/40 µV

Signal-to-Noise Ratio (with 1 mV aerial voltage):

Unweighted (according to IHF),  Stereo/Mono : 75/78 dB

Weighted (according to DIN), Stereo/Mono : 62/66 dB

Unweighted (according to DIN) , Stereo/Mono : 65/68 dB

Distortion (according to DIN), Stereo/Mono :  0,15%/0,15%

Selectivity (according to IHF), ±400 Hz :  80 dB

Image Frequency Rejection Ratio:  70 dB

AM suppression:  70 dB

IF Rejection:  95 dB

Limiting (-3dB) with 75 Ω aerial impedance:  0,7 µV

Muting Thereshold with 75 Ω aerial impedance:  4 µV

Capture ratio:  0,9 dB

Channel Separation (accor. to DIN 45 500):  40 dB

Pilot Tone Suppression (accor. to DIN 45 500):  70 dB

38 kHz Suppression (accor. to DIN 45 500):  60 dB

Tuner AM Section

Wave Bands:  518 - 1600 kHz

Selectivity at 1 MHz ±9 kHz :  42 dB

Distortion with 30% modulation :  0,8%

Sensitivity at 1 MHz, 30% modulation , 20 dB S/N:  20 µV

General

Cabinet:  Delivered in Teak, Rosewood or Walnut

Mains Voltage:  240 V 50.60 Hz (internal tappings for 120-220-240 V)

Dimensions (W x H x D):  515 x 153 x 353 mm (20½" x 6" x 14")

Depth with knobs:  378 mm (15")

Weight:  12,5 kg (27,5 lbs)