Discrete Components OTL Power Amplifier 10W Speaker Kit Electronic Diy Parts | Инструменты

Discrete Components OTL Power Amplifier 10W Speaker Kit Electronic Diy Parts | Инструменты

   This transistor has discrete componentsOTLThe power amplifier is80A perfect power amplifier jointly designed by the whole country in the S，It has been used as audio amplifier in many domestic TV sets，The circuit is stable，Wide voltage adaptability，Beautiful sound quality，High output power。This circuit is in my heart30Many years agoDIYIt has been doing well in a number of TV sets，In particular, the TV can still be watched normally。In several sessions of the ore radio ForumDIYIn the competition，A few of mineFM/AMThe power amplifier of multi band radio adopts this methodOTLCircuit，These are a fewDIY My radio is also one of my favorite works，Because of the wide range of the amplifier，Enough power margin，Whether it's listening to music or listening to men's and women's broadcasts，That's sweet、The mellow feeling makes people have endless aftertaste。to this end，I specially made this circuit into a set，Select all components，Elaborate circuit board design，Guarantee everyDIYYou can do it in one go，Let's experience the magic charm of transistor discrete component power amplifier！

（This product is not finished product，You need to assemble it yourself，Here is the finished product display，Knobs are not included in the spare parts list，You need to buy it separately。）

OTLPower amplifier adjustment

1、          Adjustment of neutral point voltage：turn on electricity，testingC7Positive voltage of electrolytic capacitor，adjustmentW2Make the voltage here equal to the power supply voltage1/2。If the specified value is not reached in the adjustment，It can be replaced properlyR2orR1Resistance value of。

2、          Adjust up and down balance：R11It's adjustmentBG4andBG6Measurement of output amplitude，When installing the machine, the power amplifier tube with higher magnification can be placed below，Make use of itR11Adjust to balance with the upper part，This can only be detected with an audio signal generator and an oscilloscope。But I've basically paired the amplifiers，This detection is unnecessary for users。

3、          Static total circuit detection：The quiescent current of this circuit consists of three diodesN4148control，Generally, no adjustment is required，Under normal conditions, the total current is8mAabout，in order toDIYThe rest assured of the circuit，It is necessary to recheck the total quiescent current,As long as the three diodes are not reversed or open，This current will generally be normal，If the current is too high，Please check the diode。

   Circuit board size：6cmX8.5cm

 Compact mono amplifier size：55*50mm