Homemade SW Converter

Establishing

Establishing Converter is extremely easy. If all the items are applied are as mentioned above, the establishment of all reduced to establishing the correct direction of coil winding and a feedback to adjusting the distance between the windings of the feedback coil and the tuning coil. Wrong direction of turns of the coil feedback is recognized by complete silence converter (of course prior to assembly converter, check the serviceability of all its parts, and after the end of the assembly - the accuracy and reliability of all connections). If such silence converter will take place, the ends of the feedback coil should be interchanged. Thereafter correctly assembled converter will generate, but it is possible that it will generate only a part of the range.
In this case, windings of the coil closer to the windings of the feedback coil configuration. Rapprochement is possible to produce almost direct touch between the turns of the windings of both ethics.

Rotating mechanism and the scale applied in the described converter allows accurate calibration of the device at the stations. Such grading can be done only by an experimental method - take on the converter station and the mark on the scale of those provisions of the pointer, which is obtained when tuning to a particular station. Defining fine-tune in a station, it is necessary to put a mark on the scale (eg point) and write notes about the station name. Initially, until the station will not be determined exactly, it is better to confine writing only station names, then it will be possible to calibrate the converter and the frequency or wavelength.

Example of converter scale

It is difficult to make such grading immediately, because the converter at different times of the day and even at the same time will be taken several "London" several "Berlin", etc. Understand, on what kind of wave works audible at the moment the London station, not always is easy.During calibration should be borne in mind that the settings on each station will fit two pointer position settings, which makes grading frequencies or waves. In fact, when receiving stations on the converter to better focus on the mark with the names. Wave frequency and the same calibration in the converter can be two and in each case it will be very difficult to determine on what scale should take a reading.



homemade converter in the box Therefore, when applying for a converter station unknown should find both settings at her, and then by comparing the position of its configuration settings from the position of the double on other known stations, can be true impression of the length of its wave or its frequency. It should also be borne in mind that the grading shortwave converter is only correct if one absolutely certain that the long-wavelength tuning of the receiver, which is connected to a short-wave converter. Therefore, before you begin the calibration of the converter, it is necessary to determine which setting longwave receiver is the most favorable in terms of the absence of interference from local or general gromkoslyshimyh radio and radio stations. When such a favorable adjustment of long-wave receiver and found her "quality" observations confirmed a few days - you can start grading converter. Appropriate setting longwave receiver should be noted accurately in the future accession to the receiver converter necessarily accurately tune in to this wave.


Previous  | 


Add comment:

Header:  
Name:  
code protection:*  
email:*