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  Adjustment Procedure

Introduction to Adjustment Procedure

The adjustments are to be prepared through alignment screw driver.

At the very first, the output IF transformer (detector) is to be tuned, and after that middle transformer and at last the input IFT should tuned. While maximum output is pointed out in the output meter the adjustment should be finished. Then all the cores should be filled by wax.

RF ALIGNMENT

 

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It is categorized as follows:

1.  Low frequency (IF) alignment

2.  High frequency (HF) alignment.

SETTING THE RECEIVER

1.  Disconnect the aerial of the receiver

2.  In the place of speaker connect the output meter.

3.  The oscillator has to be disabled.

4.  At the aerial points connect the generator.

5.  AVC should not be functioned.

6.  Volume control should be at the maximum of it.

SETTING THE GENERATOR

1.  Put the generator in on position of it.

2.  Mode and band selector controls are to be in wanted positions.

3.  Select the needed RF signals through using frequency selector.

4.  RF control has to be in maximum position of it.

PROCEDURE

For acquired the maximum output adjust the tuned circuits. For high frequency alignment antenna trimmer is tuned. The cores of coils are adjusted, for the low frequency alignment. The adjustment is finished while maximum output is pointed out in the output meter. After done the adjustments, the cores and trimmers are filled with max.

TRACKING

After the receiver is aligned, it should perform evenly well on the entire dial scale. To keep this quality the intermediate frequency signal (455 KHz) should be similar. The procedure to acquire such type of ability of the receiver through maintaining the constant IF signal is said to be tracking.

The tracking adjustments are finished by the help of adjusting the padders and trimmers. For high frequency range the trimmers are adjusted. On the other hand, while the padders are adjusted for low frequency range and in the middle range, adjustment is not essential. If the two ranges of the Gang are correctly tuned at any one of the band, the receiver will function adequately on all the bands.

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