SANSUI TU-7500 AM/FM STEREO TUNER HI-FI (1974) - MANUALS - ACCESSORIES – BOX

SANSUI TU-7500 AM/FM STEREO TUNER HI-FI

• ORIGINAL MADE IN JAPAN - 1974

DESCRIZIONE / DESCRIPTION

• IN OTTIME CONDIZIONI - FUNZIONANTE AL 100%
• BORDO IN METALLO ANCORA CON PELLICOLA ORIGINALE PROTETTIVA
• INTROVABILE CON MANUALI, ACCESSORI E IMBALLO - TUTTO ORIGINALE
• IN VERY GOOD CONDITIONS - 100% FULL WORKING
• METAL EDGE STILL WITH ORIGINAL PROTECTIVE FILM
• UNFINDABLE WITH MANUALS, ACCESSORIES AND BOX - ALL ORIGINAL

AUDIO DATABASE - 1974

This FM/AM tuner uses the newly developed D. D. C. (differential demodulation circuit) to achieve higher sound quality.

The FM fm front end, dual gate MOSFET with low NF (noise figure) and frequency number line type 4 series varicon are adopted.

The IF stage consists of three stage amplification using a newly developed uni-wafer-type two element ceramic filter with excellent selectivity and a limiter circuit using three highly integrated ICs.

In addition, this circuit emphasizes the phase problem that affects sound quality and separation, thoroughly investigates the distortion caused by the phase shift, and has a unique circuit configuration with excellent phase linearity.

The MPX section employs a unique D. D. C. (differential demodulation circuit) to electronically cancel the SCA filter to prevent phase shift and improve separation.

The AM IF section is equipped with a newly developed coil + 2-element ceramic filter to improve selectivity and other characteristics.

Equipped with a newly developed noise suppressor switch, it works as a whistle filter to suppress beat noise of 7 khz or higher when receiving AM broadcasting, and as an MPX noise canceller circuit without cutting the high frequency band of 10 khz when receiving FM broadcasting.

Stabilization is achieved by using a transistor and a zener diode for the power supply circuit.

In order to support 4-channel discrete broadcasting, it is equipped with a dissonate Krimi to a 4-channel adapter.

The FM muting switch and muting adjustment function are transparent.

The FM input sensitivity can be switched between two levels : Local and Distant.

Type

FM/AM Tuner

FM Tuner Section

Receiving frequency

76 MHz to 90 MHz

Sensitivity (IHF)

1.9 μ V

Total harmonic distortion factor

Mono : 0.3% or less

Stereo : not more than 0.5%

Signal-to-noise ratio

70 dB or more

Selectivity

70 dB or more

Capture Ratio (IHF)

2dB

Image Frequency Rejection

75 dB or More (83 MHz)

IF Rejection

90 dB or more

Spurious response rejection

80 dB or more

Stereo separation

40 dB or More (400 Hz)

Unwanted radiation

34 dB or less

Antenna attenuation

20dB

Frequency characteristic

30 Hz ~ 15 kHz + 0.5 -2dB

Antenna input impedance

300 Ω (Balanced Type)

75 Ω (Unbalanced Type)

<AM Tuner Section>

Receiving frequency

535 kHz to 1605 kHz

Sensitivity (bar antenna)

50dB/m

Selectivity

25 dB or More (± 10 kHz)

Image frequency rejection

80dB/m or More (1000 kHz)

IF Rejection

80dB/m or More (1000 kHz)

<General>

Output voltage

0 V ~ 1 V

Tape rec output : 0.3 V

Power consumption

20W

External dimensions

Width 440x Height 140x Depth 322 mm

Weight

8kg

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