The wire is selected to be close to 1mm in thickness. It is built by winding 20 turns of super enameled copper wire over the 1 Ohms resistor itself. The inductor is kept for improving the dynamic nature of the circuit. This saved me from the headache of using the cumbersome and low efficient mica isolation kit between the transistors. Though a common heatsink may be used for the entire set of the output devices, I personally used separate individual heatsinks for each of the transistors. The output stage is able to produce a massive 200,000 times amplification factor with comparatively very low quiescent current drain.The quiescent can be set by the adjusting the preset P1.ĭue to a non critical nature of the circuit, the entire project can be easily built over a general purpose PCB, however the layout of the components or rather the placement and the ratio of the distance of the components must be kept as identical as possible to the layout of the circuit diagram. The above two sections are perfectly complementary to each other, with reference to the diagram which indicates their emitters being terminated to a common point through the resistors R25 to R27 and via R28 to R30, this effectively that the wiring is exclusively symmetrical by nature. However a closer inspection tells us that of course the wiring is symmetrical, having the transistors T11, T13, T15 at the upper section acting like special booster transistor package.Similarly the lower section also employs identical super booster stage consisting of the transistors T12, T14 and T16.
2N3055 TRANSISTOR DIAGRAM DRIVER
The input stage of the circuit begins or initiates with a symmetrical differential preamplifier stage consisting of the transistors T1, T2 and T3, T4.T5 and T6 are positioned as the current sources which are further extended as the driver stage consisting of the transistors T7 and T8.
2N3055 TRANSISTOR DIAGRAM HOW TO
The circuit efficiently drives a 100 watt 4 Ohms speaker with inputs derived from any audio source like a cell phone or DVD player etc.īefore you learn how to build this interesting and useful 100 watt amplifier circuit using 2N3055 transistors, a prior understanding of the involved circuit configuration would be very handy, let’s begin the explanation with the following points: Circuit OperationĪ quick glance at the given circuit diagram makes us conclude that the output configuration is not symmetrical, since the transistors T15 and T16 are both NPN types. Basically, the entire configuration is a symmetrical class A amplifier incorporating an input filter stage, an intermediate driver stage and a powerful symmetrical output stage consisting of the versatile 2N3055 power transistors.
0 kommentar(er)
