This is a very simple, low cost, Hi-Fi quality power amplifier. You can build it 5 ways, Please follow the table (from 20 W to 80 W RMS). Description: The first thing that you must do, is to measure the end transistors (T3 and T4) amplifying coefficient, the hfe or ?. If their disagreement is [...]
Parts
Designing of Stereo Preamplifier with Bass-boost
It’s a high Quality, simple design with 20 to 30V supply. Circuit Diagram: Parts: P1_________________10K Log.Potentiometer (Dual-gang for stereo) P2________________100K Log.Potentiometer (Dual-gang for stereo) (See Notes) R1,R2_____________100K 1/4W Resistors R3,R6______________15K 1/4W Resistors R4_________________10K 1/4W Resistor R5_________________22K 1/4W Resistor R7__________________1K 1/4W Resistor R8________________560R 1/4W Resistor C1,C2,C5____________2?2 63V Electrolytic Capacitors C3________________470?F 35V Electrolytic Capacitor C4__________________1?F 63V Polyester [...]
Designing of Amplifier 2x30W with STK465
A amplifier of acoustic frequencies can be manufactured with discernible materials, despite is known so much the difficulties of finding of materials, what the problem of regulations. These difficulties are overcome relatively easily if we find amplifier in form completed. Completed STK465 is an amplifier of acoustic frequencies that offers qualitative output, using minimal exterior [...]
Designing of Low pass filter – Subwoofer
The acoustic spectrum is extended by very low frequencies 20Iz and reaches as the 20000Iz in high frequencies. In the low frequencies is degraded the sense of direction. This reason us leads to the utilization speaker for the attribution of very low frequencies. The manufacture that to you we propose distinguishes these frequencies, in order [...]
Low impedance microphone amplifier
Description The circuit is a microphone amplifier for use with low impedance (~200 ohm) microphones. It will work with stabilized voltages between 6-30VDC. If you don’t build the impedance adapter part with T1, you get a micamp for higher impedance microphones. In this case, you should directly connect the signal to C7. Circuit diagram Layout [...]
Designing of Two way cross-over 3500 Hz
Cross-over they are netting usually with passive materials that have aim to separate a region of frequencies in smaller. Cross-over the manufacture that to you we offer it separates the acoustic region in two sub areas in order to we lead two loudspeakers for the high frequencies and for low. Cross-over they are essentially for [...]
Designing of Mini-box 2W Amplifier
This amplifier is designed for self-powered 8, 4 & 2 Ohm loudspeakers with Bass-boost switch Circuit diagram: Parts: P1 = 10K Log.Potentiometer R1,R2 = 33K 1/4W Resistors R3 = 33R 1/4W Resistor R4 = 15K 1/4W Resistor R5,R6 = 1K 1/4W Resistors R7 = 680R 1/4W Resistor R8 = 120R 1/2W Resistor R9 = 100R [...]
