Pioneer sx-450 manual FM Section, TC1

Page 9

9 . 2 FM SECTION

1.Through 300 ohm dummy antenna, connect FM signal generator to the 300 ohm FM antenna terminals and set for 4OOHzat 100dB and IO0% modulation.

2.Connect AC voltmeter and distortion meter to TAPE REC jack (L or R).

3.Set FUNCTION switch to FM and MUTING switch to OFF.

4.Set FM signal generator and SX-450 dial indication to point A (90MHz).

5.Adjust T3 for maximum indication on AC voltmeter.

6.Adjust T5 lower core for center of scale indication on AM/FM meter.

7.Set FM signal generator for 9dB output and adjust T1 and T2 for maximum indication on AC voltmeter.

8.Set FM signal generator and SX-450 dial indication to point C (106MHz).

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9.Adjust TC3, then TC1 and TC2 for *u"i*rr- indication on AC voltmeter.

10.Again set FM signalgeneratorand SX-450dial indication to point A.

11.Adjust T3, then T1 and T2 for maximum indication on AC voltmeter.

12.Repeat steps 8-11 to eliminate variations in sensitivity at points A and C.

13.Adjust "t4 for maximum sensitivity.

14.Detune to noise only and adjust T5 lower core for center of scale indication on FM meter.

15.Set SX-450 dial indication to point B (98MHz) and adjust FM signal generator for center of scale indication on AM/FM meter.

16.Set FM signal generatoroutput to 60dB and adjust T5 upper core for minimum distortion.

17.Repeat steps14-16 eliminate variation in mini- J" 'a

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sx-450 specifications

The Pioneer SX-450 is a revered receiver that has left its mark on the audio world since its introduction in the mid-1970s. Recognized for its impressive performance and classic design, the SX-450 remains a favorite among vintage audio enthusiasts and collectors.

One of the standout features of the SX-450 is its power output. Capable of delivering 22 watts per channel into 8 ohms, it offers a warm, rich sound that appeals to audiophiles who appreciate the nuances in their music. The receiver is designed to accommodate a wide range of speakers, making it a versatile choice for different audio setups.

In terms of connectivity, the Pioneer SX-450 is fitted with multiple input options, including phonograph, tape, and auxiliary inputs. This allows users to connect a variety of sources, such as turntables, cassette decks, and CD players. This versatility makes it a suitable receiver for both modern and vintage audio gear, providing audiophiles the opportunity to enjoy their extensive music collections.

Tuning capabilities are another highlight of the SX-450. It features a built-in FM stereo tuner with a wide frequency response and excellent selectivity, ensuring that users can access their favorite radio stations with clarity and precision. The receiver's tuning is complemented by a well-illuminated dial and a tuning needle that allows for easy signal acquisition, enhancing the user experience.

The design of the SX-450 is classic and appealing, featuring a brushed aluminum faceplate that exudes vintage charm. The control knobs are large and intuitive, allowing for easy adjustments of volume and tone settings. The eye-catching dial lights emit a warm glow, inviting users to enjoy their listening experience even in low-light conditions.

The Pioneer SX-450 also incorporates advanced technologies for its time, including a low-noise transistor design that minimizes distortion for cleaner sound reproduction. Its discrete output stage architecture enhances audio fidelity, ensuring faithful reproduction of recordings.

Durability is another characteristic of the SX-450, built to withstand years of use while maintaining optimal performance. This longevity contributes to its status as a sought-after vintage receiver, coveted for its nostalgic value and superior audio quality.

Overall, the Pioneer SX-450 is more than just a receiver; it represents a period in audio history where quality and craftsmanship were paramount. Skilled engineering, classic style, and impressive sound make the SX-450 a timeless piece of audio equipment that continues to resonate with music lovers today.