Sansui Tuner TU 3900

Hallo tanksanddrums,

Hier ein paar Infos zu Deinem Tuner.
Quelle Sansui Prospekt 1976/77

Original Sansui Tuner Technology
To many, the ability to send music-even stereo and 4-channel music-through the air via radio beams still has the awesome and mysterious quality of magic about it. Few people aside from electronics engineers and radio specialists really understand how the phenomenon works, but we all enjoy it, nonetheless. And if the equipment used is truly first class, our enjoyment is increased a thousandfold.
Sansui's widely acclaimed TU series of stereo FM/AM tuner components is engineered and built with extraordinary care to assure first-class performance in any situation. Reception and reproduction of FM stereo and AM broadcasts in even the most remote areas-or in the very heart of station-congested urban areas-is guaranteed by Sansui's original research and development of sensitive, selective and very stable tuner circuits in every TU we make
The TU-3900, which matches the Sansui AU-4900/3900 amplifiers in looks, performance and price range, is by no means an exception to this tradition
Designed for Functional Versatiiity One look and listen to the TU-3900 confirms that it's a first-class tuner in every way. Its easyto-read slanted tuning dial is FM linear (each 250Hz section is equidistant from the next) and its tun tuning meters are positioned for accurate use. Note the large tuning knob. smoothly counterbalanced with a flywheel Inside Note, too, the LED (Light-Emitting Diode) illuminators for pinpoint tuning and
FM STEREO indication, and the pushbutton FM Muting and FM Antenna Attenuator switches. WhaYs more, the rear panel has facilities for Dolby FM and discrete 4-channel FM adaptor connections and more.
IC-Paciced Circuitry with MOS FFTs The TU-3900 has an IC-packed FM frontend with a dual-gated MOS FET transistor and a newly-designed low-noise transistor amplifier for ideal FM reception. Its precision-finished 3-gang variable capacitor helps you tune in
your tavonte FM station with minimum interference. And the two bi-resonator ceramic filters and monolithic IC limiter in the FM intermediate frequency (IF) stage mean clear and trouble-free FM reception for years.
ICs for MPX Stereo and AM, Too Integrated circuits have also been applied to the MPX (multiplex) stereo FM demodulator section, FM IF section and AM section too. LEDs for the red-illuminated dial pointer and the FM STEREO indicator also mean longer, more reliable performance. And to assure the stable operation of all circuits, a constantvoltage power supply furnishes each with a steady and unchanging flow of power irrespective of fluctuations in AC line voltage.
AM Reception Is Better Than Fver AM broadcasting has come a long way toward reducing noise and improving frequency response lately. Our AM section takes advantage of these improvements by incorporating a high-density monolithic IC, a bi-resonator Jaumann ceramic filter, a large, built-in AM bar antenna and other advanced features. Particular attention has been paid to the elimination of AM whine, whistle and boom and the reduction of adjacent-station Interference
Accurate Twin Tuning Meters
The problem of meters which can be fooled or over-saturated by false radio signals is one which Sansui has taken very definite steps to 'solve. And solved It wo have. The twin meters in the TU-3900 are as accurate and linear as any ever developed, while at the same time they are extremely easy to use. The one at the far left of the tuning dial is a signal-strength meter for tuning both FM and AM broadcasts lt is specially damped to indicate when you have selected the tuning position at which the incoming signal is at its maximum strength for clear reception The next is a center-of-channel meter for FM tuning. When its needle points exactly to the middle of its scale you know that your station is tuned to where noise is at a
niiniinum aiiu siereu separauun is iaeai. FM Antenna Attenuator
The FM Antenna Attenuator button on the TU-3900 is a feature you won't find on the average tuner in this price range. When the distance from your listening room to the transmitter is short, use this button to reduce the strength of too-strong signals to avoid overload distortion and to clarify FM sound.
FM Muting
As in most high-quality FM tuners the TU-3900 features a built-in FM Muting circuit to eliminate inter-station hiss noise while you tune from station to station. Unlike many tuners in this price range, however. the FM Muting circuit is switched on the front panel to allow you to disconnect it when you wish to tune in faint or distant stations which otherwise might be muted out
Dolby FM and FM 4-Channe€ Features The use ot the Dolby System to reduce the noise-level in FM transmissions is gaining in popularity in parts of America and the rest of the world. Special Dolby FM adaptors are required to take advantage of this improvement, and the rear panel of the TU-3900 is especially equipped to accept them. Also on the rear panel is a DET OUT jack to which you may connect an adaptor for the reproduction of discrete 4-channel FM broadcasts when and If such broadcasts and adaptors become commercially available
Additional Features
The rear panel of the TU-3900 also features an extra AC convenience outlet so that you may for instance, connect and power a tape deck for tuner-to-deck recording. The built-in AM bar antenna is designed so that external AM antennas are not required in most cases. FM antenna connections are provided for the 300-ohm and 75-ohm (coaxial) type leads.

TU-3900
FM SECTION
TUNING RANGE 88 to 108MHz
SENSITIVITY IHF 2,0 uV DIN,1.1 uV
TOTAL HARMONIC DISTORTION MONO less than 0.3%, STEREOless than 0.4%
SIGNAL TO NOISE RATIO better than 70dB
SELECTIVITY better than 60dB
CAPTURE RATIO less than 2.O dB
IMAGE FREQUENCY REJECTION better than 55dB at 98MHz
IF REJECTION better than 80d8 at 98M Hz
SPURIOUS RESPONSE REJECTION better than 70dB at 98 MHz
SPURIOUS RADIATION less than 34dB
STEREO SEPARATION better than 40dB at 1.000 Hz
FREQUENCYRESPONSE
30 - 15,00OHz
ANTENNAINPUTIMPEDANCE 300 ohms balanced 75 ohms unbalanced
FM ANTENNA ATTENUATOR -20dB
AM SECTION
TUNING RANGE 535 to 1.605kHz
SENSITIVITY (Bar Antenna) 53dB/m at 1.OOOkHz
SELECTIVITY better than 30dB at 1,OOOkHz
IMAGE FREQUENCY REJECTION better than 80dB/ m at 1,OOOkHz
IF REJECTIONbetterthan 80dB/m at 1,OOOkHz
OUTPUT LEVEL
OUTPUT775mV at FM 100% modulation, DOLBY250mV at FM 100% modulation
GENERAL AC OUTLETunswitched Max. 150 watts
SEMICONDUCTORS13 Transistors; 1 Zener Diode; 1 FET; 3 ICs; 2 LEDs, 6 Diodes
POWER REQUIREMENTS
POWER VOLTAGE 100, 120, 220, 240V 50/60Hz
POWER CONSUMPTION RATED5 watts
DIMENSIONS400mm (153/<")W 120mm 143,")H 240mm (9Y2")D
WEIGHT5 Okg (11.0 Ibs) Not 6.3kg 113.91bs1 Packed
Note: No AC outlet is provided with the models sold in Europe.
Design and specifications subject to change without notice for improvements.

Gruß

Michael-Otto

Aloha Michael-Otto!

Vielen lieben Dank!

Gruß, Olaf