What is stereo?




There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.




H.H. Scott '59





Tandberg TR-1000

 The Tandberg Tr-1000 FM Stereo Receiver , one of the highlights in the Tandberg line of receivers was designed and constructed especially for the international high fidelity market. Superb features that permit extraordinarily all-round usage have endeared the TR-1000 to thousands of audiophiles throughout the world.

Features:
Specifications exceed DIN standard 45500 by ample margin.
Power output 2 x 50 Watts RMS (2 x 70 Watts music power)
Built-in decoder for FM stereo reception
Interststion noise muting
Djustable inputs.
Extra output for recording pre-amplified programmes.
Loudness compensation added to volume control.
Separate bass and treble controls for each channel.
Low-cut filter and 2 high-cut filters.
Front jack for stereo headphones.
 Tuner
The Tandberg Stereo Receiver TR-1000 contains a highly sophisticated FM tuner built up of duall gate MOSFET transistors. Pre-selection of up to 6 FM stations. Built-in decoder for FN stereo reception. Muting effectively suppresses interstation noise during tuning. Black dial remains dark until power is turned on, then lights up in crisp contrast to provide pleasant, easy tuning.


Powerful Amplifier
With its high power output, 2 x 50 watts RMS the TR-1000 is ideal as central unit in any stereo system. The output stage features extraordinarily low crossover distortion (full complement of output terminals). Series capacitors provide your external speakers with maximum protection. Fuses blow in the event of a short circuit at the output terminals. Thermostat provides protection against damege in the event of insufficient cooling.
The Tandberg TR-1000 is provided with volume control and balance control. Separate bass and treble controls for each channel. These latter permit individual channel adjustments to be made. Loudness compensation can be added to the volume control. This causes the lower and higher frequencies to be increased more than the middle frequencies when the volume is turned down, thus reducing the tendency of the music to sound thin at low volume.
 Inputs/Outputs
The TR-1000 is provided with inputs for a record player (RIAA equalised pre-amplifier for magnetic pickup) and up to three tape decks. All inputs have adjustable sensitivity. The tape monitor facility makes it possible to monitor from either the tape itself or from the source while recording  using a tape deck with separate recording and playback heads as, for example, the Tandberg Series 9000X, 6000X or 3000X.

Three Filters
The Tandberg TR-1000 is provided with one low-cut filter that reduces rumble from the record player and acoustic feedback between speaker and pickup. Two high-cut filters limit noise such as that heard when playing worn records. Internal scale illumination lights individual legends as functions are engaged.
Specifications
Tuner Section
Frequency Band:  87,5 - 108 MHz
Audio Frequency Response:  20 - 16,000 Hz
Sensitivity (at 26 dB signal/noise ratio, DIN):  1µV at 75 Ω, 2µV at 300 Ω
Signal/Noise Ratio:  68 dB in mono; 66 dB in stereo
Harmonic Distortion:  0,2% (DIN); 0,3% (IHF)
Limiting: 1,5µV at 75 Ω (-3 dB)
Muting Threshold:  5µV at 75 Ω
Capture Ratio:  1,8 dB
Channel Separation:  35 dB at 1 kHz (DIN)
Pilot Tone Suppression:  68 dB (DIN)
38 Hz Suppression:  50 dB (DIN)
Audio Section
Power Output (0,2% THD at 1 kHz DIN)
2 x 50 Watts RMS into 4 Ω
2 x 35 Watts RMS into 8 Ω
Music Power:  2 x 70 Watts into 4 Ω
Harmonic Distortion:  0,1% at power output 1 dB below nominal value and lower.
Intermodulation Distortion: 
Pre-amplifier : 0,1%
Power amplifier : 0,2%
Damping Factor:  30 at 4 Ω, 60 at 8 Ω
Power Bandwidth (DIN):  10 - 60,000 Hz into 8 Ω
Frequency Response (linear inputs, DIN): 12 - 60,000 Hz  (-1,5 dB)
Treble Control: ±14 dB at 10,000 Hz
Loudness:  +7 dB at 10,000 Hz
Bass Control:  ±16 dB at 50 Hz
Loudness:  =12 dB at 50 Hz
Low-cut filter:  -3 dB at 70 Hz (-12 dB per octave)
High-cut filter 1:  -3 dB at 8000 Hz (-12 dB per octave)
High-cut filter 2:  -3 dB at 8000 Hz (-6 dB per octave)
Channel Separation (DIN):
Phono  : 52 dB
Tape : 55 dB
Signal/Noise-and -hum Ratio (IHF, reference maximum power output and nominal input signal):
Tape 1 and 2 : 80/82 dB
Phono : 65/67 dB into 4/8 Ω
Nominal Sensitivity (full power output at 1 kHz into 4/8 Ω)
Tape 1 and 2 : 220/260 mV, adjustment range 130-599 mV
Phono : 3/3,6 mV, adjustment range 1,8-6 mV
Tape 1 and 2 Outputs (Quiescent): 1 V across phono contacts and 200 mV across DIN contacts.
General
Power Requirements:  110/220 V AC, 50/60 Hz
Power Consumption:  28 - 225 Watts
Dimensions (W x H x D):  430 x 120 x 305 mm (17" x 4-¾" x 12")

Weight:  8,8 kg (19,5 lbs)

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