Sony ST-SA5ES AM-FM Tuner
MACCHINA DI RIFERIMENTO DELLA LINEA ESOTERICA <strong>SONYstrong>. UN GIOIELLO COME POCHI CHE FORNISCE PRESTAZIONI DI RIFERIMENTO, CON UN LIVELLOCOSTRUTTIVO ALLO STATO DELL'ARTE. The <strong>Sonystrong> ST-SA5ES tuner is extremely sensitive so it is execellent for most FM-DX situations. There are only a handful of FM tuners which can either match or exceed its DX performance. <strong>Sonystrong> ST-SA5ES tuner has two 75 ohm antenna inputs which can be switched via the front panel, go to the first RF amplifier - a Toshiba 2SK241 FET. The RF front end is tuned by six KV varicap diodes. This arrangement is excellent for image and spurious rejection. The varicap diodes act as a automatic preselector which pass a narrow bandwidth (~ 2MHz) of signals to the first RF amplifier. For this reason the image rejection performance is 100dB. The FM oscillator is built around a Toshiba 2SK161 FET. The FM mixer consists of a Toshiba 3SK122-K dual gate MOSFET. Two IF stages are provided for wide and narrow IF bandwidth. Two 180 KHz Murata filters are used for wide if bandwidth. Two 180 KHz and two 150 KHz Murata filters are used for narrow if bandwidth. The IF amps used in the IF stages are Toshiba uPCHA ICs. A quadrature detector precedes the audio frequency amplifier. COME NUOVA, USATA SOLO PER FARE RECENSIONE DI RIVISTE DI SETTORE. INTONSA E SENZA SEGNI E/O IMPERFEZIONI. MOLTO RARA PREZZO DA DEFINIRE VALUTO OFFERTE RITENUTE CONGRUE