http://v.youku.com/v_show/id_XNDQxNDk1NTEzMg==.html

\\

\\

\\

\\

Audio amplifier circuit，Output sufficient audio power to the modulation circuit。

\\

\\

\\

\\

\\

This board adopts collector modulation，Small distortion、Characteristics of adjustable amplitude，Superior sound quality；Suitable for radio enthusiasts and students。

\\

\\

\\

\\

\\

\\

adjust223Adjusting capacitance，Variable frequency at530~1600KHZ；

\\

Debugging method of parts：takePVCCounterclockwise to the end，holdPVCFine tune the capacitance to the angle shown in the figure，Set the digital display radio to530KHZ，Fine tune the mid cycle until the signal is received；Then adjustPVCClockwise to the end，Set the digital display radio to1600KHZ，adjustPVCFine tuning capacitance to1600KHZ，Adjust the radio back and forth to set the radio at5300~1600KHZ。It is similar to the method of adjusting the local oscillator of the whole transistor。

\\

\\

\\

\\

The use and testing of radio transmitters shall comply with local radio regulations，Adjust the amplitude knob to minimize the power。

\\

\\

\\

\\

\\

\\

\\

\\

\\

\\

\\

'