100W Audio Amplifier Transistor used BDW83D - BDW84D circuit diagram

100W Audio Amplifier Transistor used BDW83D - BDW84D circuit diagram         

Here 100 watt power audio amplifier which using power transistor BDW83D and BDW84D. Copyright belong to Smart Kit.

Schematic diagram:

Component part list:

R1 = 1,2 K                                   D1 = 1N4002-7  

R2 = 0,47 OHM                           D2 = 1N2002-7  

R3 = 220 OHM                            D3 =  1N4148     

R4 = 3,9 K                                   D4 = 1N4148      

R5 = 2,2 K                                   D5 = 1N4148      

R6 = 2,2 K                                    D7 = 1N4148     

R7 = 10 K                                    D8 = 1N4148      

R8  = 4,7 K                                  Q1 = BDW84D   

R9 = 150 OHM                            Q2 = BD829       

R10 = 39 OHM                            Q3 = BC546       

R11 = 3,3 K                                  Q4 = BC556      

                                 

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20 WATT FLUORO INVERTER used tip3055

20 WATT FLUORO INVERTER used tip3055

This circuit will drive a 40 watt fluoro or two 20watt tubes in series.
The transformer is wound on a ferrite rod 10mm dia and 8cm long.

The wire diameters are not critical but our prototype used 0.61mm wire for the primary and 0.28mm wire for the secondary and feedback winding.
Do not remove the tube when the circuit is operating as the spikes produced by the transformer will damage the transistor.
The circuit will take approx 1.5amp on 12v, making it more efficient than running the tubes from the mains. A normal fluoro takes 20 watts for the tube and about 15 watts for the ballast.
source : http://talkingelectronics.com/projects/200TrCcts/200TrCcts.html

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