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)