Showing posts with label transistor. Show all posts
Showing posts with label transistor. Show all posts
Wednesday, September 24, 2014
How to Treble and Bass Control without IC or Transistor
This Treble and Bass Control without IC or Transistor circuit consists of bass and treble just a few capacitors, resistors and two potentiometers to adjust BASS and TREBLE. The circuit is very functional, can be used to adjust the small sound amplifiers. And control Treble and works relatively well. The interesting thing is that this control does not use or IC or transistor.
Treble and Bass Control without IC or Transistor Circuit Diagram
How to Treble and Bass Control without IC or Transistor
AB Transistor Audio Power Amplifier Circuit Diagram
This is a class AB transistor power amplifier. It is a simple amplifier to build, uses standard parts and is stable and reliable. The entire circuit utilizes commonly available components and may be simply built over a general-purpose board. But this amplifier has very good sound quality.
There are eleven transistors, including four in the output stage. Q1 and Q2 transistor must be between 3 and 5 amperes power transistors. Q4 and Q5 must be between 100mA and 500mA driver transistors. Other transistors are 10mA small driver transistors. Q1, Q4 and Q2, Q5 are complementary pairs, they make complementary darlington pairs.
| PART LIST | |
| R1 | 1.5KΩ ¼W |
| R2 | 150Ω ¼W |
| R3 | 1KΩ ¼W |
| R4 | 0.22Ω 2W |
| R5 | 0.22Ω 2W |
| R6 | 39KΩ ¼W |
| R7 | 1KΩ ¼W |
| R8 | 120Ω ¼W |
| R9 | 6.8KΩ ¼W |
| R10 | 6.8KΩ ¼W |
| R11 | 47KΩ ¼W |
| R12 | 47KΩ ¼W |
| R13 | 2.2KΩ ¼W |
| R14 | 180KΩ ¼W |
| R15 | 18KΩ ¼W |
| C1 | 22pF Ceramic |
| C2 | 4.7µF 16V |
| C3 | 1000µF 25V |
| C4 | 100µF 25V |
| D1 | 1N4148 |
| D2 | 1N4148 |
| Q1 | 2SD313 |
| Q2 | 2SB507 |
| Q3 | 2SA733 |
| Q4 | 2SB560 |
| Q5 | 2SD400 |
| Q6, Q7, Q8, Q9, Q10 | 2SA733 |
| Q11 | 2SD400 |
| LS1 | 4Ω 20W SPEAKER |
| Supply voltage (Vs) | = 20V |
| Speaker impedance (R) | = 4Ω |
| Peak to peak voltage (Vpp) | = 20-2 =18V |
| Peak voltage | = 9V |
| Maximum output (Pmax) | = 9V2/2R |
| = 81/8 | |
| = 10W |
Amplification of this amplifier (A)
| A | = R6/R13+1 |
| = 39KΩ/2.2KΩ+1 | |
| = 18 |
Q1 and Q2 must be kept sufficiently cool, so it is mounted on a suitable heat sink. If you used single heat sink please use insulation between transistors and heat sink.
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