8 . 2 AM TUNER

1.Set up the test equipmentasFig. 8-3.

2.Set the FUNCTION switch to AM.

3.Tune the SX-3800'sdial pointer to 600kHz, and the AM SG (AM signal generator) output frequency to 600kHz, modulation frequency

of 400H2, 30% modulated and output level of 30dB- 100d8.

4.Adjust the core of T3 to obtain maximum out- put level(REC terminal).

5.Then tune to 1400kHzand alsoset the AM SG output frequency to 1400kH2.

6.This time adjust TC5 to obtain maximum out- put level(REC terminal).

?. Repeatsteps3 - 6 above.

8.Set the AIvf SG output level to about 30d8, adjust the coil along the bar antenna and T3 at 600kHz, and TC4 and TCb at 1400kH2, in the same manner as described in the above steps. This is the adjustment for optimum sensitivity across the frequency band, and minimum difference in sensitivity at different frequencies.

9.Reset the AM SG output frequency to

1400kH2, and also tune the SX-3800 to this frequency.

10.Adjust the coresof T4 and F7 to obtain maxi- mum output level(REC terminal).

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Pioneer SX-3800 manual AC voltmeter To RECterminal, To AM ANT 1kfl resistor TerminalFis .8
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SX-3800 specifications

The Pioneer SX-3800 is a classic stereo receiver that emerged in the late 1970s, embodying the high-fidelity audio aspirations of its time. As part of Pioneer’s widely respected SX series, the SX-3800 is hailed for its exceptional sound quality, robust construction, and an array of features that cater to both audiophiles and casual listeners alike.

One of the SX-3800's standout characteristics is its power output. It delivers a solid 80 watts per channel into 8 ohms, making it capable of driving a variety of speaker systems with ease. This ensures a dynamic audio experience, with clear highs, rich midrange, and deep bass. The receiver also exhibits low total harmonic distortion (THD) ratings, which means the sound produced is clean and faithful to the original recording.

The SX-3800 is equipped with a high-quality AM/FM tuner, which is known for its excellent sensitivity and selectivity. Featuring a large analog dial, it allows users to effortlessly dial into their favorite stations while the signal strength meter helps in fine-tuning the reception. This tuner is complemented by Pioneer’s proprietary Auto-Seek tuning function, making it easier for users to find and lock onto stations.

In terms of connectivity, the SX-3800 comes with several inputs and outputs, including phono, tape, aux, and multiple speaker outputs, offering flexibility for various audio setups. Additionally, the built-in phono preamp ensures that vinyl lovers can connect their turntables with ease, preserving the rich detail and warmth that analog sources are known for.

Another technological highlight of the SX-3800 is its inclusion of a loudness control feature, which allows users to enhance the low and high frequencies at lower volume levels. This feature is particularly useful for late-night listening or in quieter environments where detail is essential but loudness is not an option.

With its solid construction, vintage aesthetics, and a beautiful wood finish, the Pioneer SX-3800 not only performs well but also adds a classic touch to any audio setup. Its blend of features, performance, and timeless design continues to make it a desirable component in the world of vintage audio equipment. Collectors and enthusiasts appreciate the SX-3800 not just for its sound quality but also for its enduring legacy in the rich history of audio technology.
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