10w 6L6 Push Pull Amplifier

Schematic

Frequency Response :
15-65Kc (-3dB), 1Kc input, at 3W RMS output across 16 ohms.

Power :
10W RMS for 700mV RMS input, with a THD+Noise of 0.29%

Tube Complement :
1x 6J5 (input), 1x 6SN7 (differential phase inverter), 2x 6L6GC (output), 1x 5R4GYB (rectifier)

The Output Transformer :
The Hammond 1650K is a 7 lb. oversized monster for our current and wattage demands, but it has a 3.4k primary.

Class A Single end 2SK1058 Amplifier

Sure there has to be single active component in an amp in order to get the gain to be called an AMPLIFIER. That's a simple amplifier as a single end tube amplifier. A single end vacuum tube Amp need a resistor or two and an output transformer. So I design a FET amp around the same simplicity of design. One audio grade MOSFET, a couple of resistors and capacitors and a heavy duty well filtered power supply. The schematic for the amplifier section is shown in Figure 1.

The amplifier is built around the Hitachi 2SK1058 N-Channel MOSFET. A schematic and pin diagram for the 2SK1058 is shown in Figure 2. I used Sprague capacitors for the input coupling and a large electrolytic on the output with a 10µF polyester bypass capacitor. The four 10W non-inductive wire wound resistors act as the load. The four resistors are 15ohm and 10W each which I wired two in series for 30 ohms and then the two sets of 30 ohms are wired in parallel to give a total resistance of 15 ohms. These get extremely hot and burn about 30W at idle. Yes, Class-A amplification is very inefficient. I burn over 20 Watts to get only about 4.8 audio Watts per channel! The heatsink I used is rated at 0.784 °C/W.

2SK1058 Pin Out

Schematic 2SK1058 Amplifier

Power Supply of  2SK1058 Amplifier

Stereo 2SK1058 Amplifier Module

300B Single End Vacuum Tube Amplifier

Current (new) production 300B tubes like the Electro-Harmonix 300B and the JJ 300B sound wonderful at a fraction of the Western Electric 300B price. A direct coupled driver stage and a low mu triode array are the specific reasons why this design works so well. Good output transformers are the key to good performance. Magnequest FS-030 or XE-60S are good choices.

The schematic for the 300B Single-Ended Vacuum Tube Amplifier is shown below. Using audio output transformers with a primary impedance of about 3000 to 3500 ohms you can expect about 8W of output with at about 2.5% THD. 

Single End Tube Power Amplifier

• This a simple Tube Amplifier with singgle end Tube.
• The power supply use 4xIN4007 Silicon Diode.
• The filament supply is regulated at 6.3V using a LT1085 voltage regulator.

The schematic taken from the book "Build your own Audio Valve Amplifiers" by Rainer zur Linde. 

YAMAHA P-2200 POWER-AMP SCHEMATIC

Bridge 100 W Amplifier

The center of this link operate firm routine is the TDA7294 incorporated routine which is actually a energy functional firm with a pre-amplifier routine, heat range management and outcome brief routine security. Moreover the IC is outfitted with individual reviews Mime (Mute output) and the STBY or Stand-By (Disconnect the energy amplifier). Each IC increases half-cycle indication reviews and provides outcome 50W each.

This 100W link firm routine must be operated with + /-25V and 4A. Where to stereo program devices demanding present should be 8A. Fill (speaker) must be 8 ohms. With these values​​, the routine will provide 100W with a complete frame distortions of less than 0.1% frame distortions or 150W with a complete of about 10%. Because of this reviews to the presenter settings to link the two devices (positive and negative), the adverse terminal should not be relocated to the floor as in other amps. Doing so will cause a brief routine at the outcome of the processor and harm it by initiating safety if not changed soon enough.

For energy can be use traditional transformer or a changing energy, in the latter situation the resource must be of top excellent and strained. But if bodyweight is not a issue we suggest using a excellent old transformer with rectifier and electrolytic and clay capacitors.

TDA7294:
The producer of this IC (SGS-Thompson) should stimulate the mute operate before using Stand-By. This IC produces 1.3 levels Celsius per w of energy. That is why we have to put on an sufficient warm mess up to avoid program get too hot and cause overtemperature shut down.

Although the maker statements that this is a built-in 100v / 100w should be recalled that this requirements is officially and in theory. In exercise, the incorporated routine can provide energy over a 50w 8 ohm load at a present of 50V for beginning which uses about 2 amperes and produces warm.

Feed Back Power Amplifier

This concept has showed up lengthy returning in Realistic Gadgets a UK centered Journal. Based on this concept I designed this routine during 1981 to 1986 with lots of field tests and variations, the style was freezing in 1986. I have constructed so many amps for me and for my friends centered on this style with various energy levels. They are still throwing in so many homes. This concept can be used to any current firm also. You must pay attention to believe the superior booming bass sounds reaction. superior mid and hi wavelengths. Excellent temporary reaction with very low frame distortions. Hope you people  will enjoy the duplication of this firm.

In the art of audio sound duplication it is well-known that the powerful presenter is more nonlinear and produces more frame distortions than all the other program elements mixed. This is particularly true at low wavelengths which need large spool adventures where the rigidity of both the inner examine and the external encompass improves quickly as the spool techniques its optimum displacement, leading to a nonlinear revocation conformity producing great frame distortions.
For example, in a common great constancy stereo audio at a consistency of about 35 Hz the complete harmonic frame distortions of the firm might be of the order of 0.01%, whereas the frame distortions of the presenter might range from about 3.0% to about 50.0%, based on the volume. If this spool movement can be thought and given as a nourish returning to the previously level of the firm, this frame distortions can be reduced considerably.

Motional Reviews (MFB) was a audio speakers developed in the early Seventies by Philips Netherlands. It presented a feedback program to the woofers of HiFi audio speakers, allowing them to achieve a more prolonged low consistency reaction in a relatively small fencing. The key benefits are a very managed bass sounds reaction. Any frame distortions caused by the fencing or the woofer itself is instantly repaired by the feedback. These hand-built audio speakers were appearing excellent and were quite expensive.

As a different strategy, instead of using the spool activity, the present circulation through the speech can be thought (the present is proportionate to spool movement) and can be used as a spool activity feedback. This novel concept is used in this firm style (I don’t declare any originality; this concept has showed up in Realistic Gadgets UK Journal – lengthy returning – They might have even trademarked it).

The firm used here is a traditional Philips audio program routine, with a requirements of 40 W RMS @ < 0.06% Total Harmonic Distortion into 8 ohms impedance presenter and having a consistency reaction from 20Hz to 100 KHz, appropriately improved for our program.

The firm is a traditional category B immediately paired quasi free of charge out put level, managing with single 56Volt provide (no need for a managed or double energy supply). BC157 is the pre-driver and 50 percent provide backing. BD 139 is the car owner, a BD139 and a BD140 free of charge couple out put car owner level with 2N3055 as final out put level. The presenter speech coils present is thought through 0.47 ohms level of resistance linked from presenter one end to ground. This indication is given as negative fed returning to past level through 470 ohms. The 50 percent provide at presenter combining capacitor can be improved by different the 39K level of resistance (if required you may fix a 100K pre set in the place of 39K and modify for 50 percent provide with no in put indication at jct of both 0.47 ohms of out put transistors and presenter combining capacitor). The quiescent present through outcome transistors can be improved with 22 ohms in sequence with two prejudice diodes 1N4007. The value for 50mA quiescent present will lie between 15 to 33 ohms for a provide of 56volts. The firm can be secured with a simple 1.5Amp fast performing blend in the positive energy.

The firm can be constructed on 40watt Philips firm program panel or on any traditional simply immediately line panel. All the three car owner transistors need chilling segments. (Standard TO220 covering chilling fins). Out put transistors need a top quality extruded metal warm mess up with insulation increasing kit and with a apply of rubber conductive oil, permanently conductance of warm.

35w Push Pull Amplifier

Power Take is designed using a tube company configurations and finally prepared push-pull. Pipe Power Firm 35W Power Take til uses EL-34 tube joints as the company end. In the power company is designed ​​with a tube at a look it looks simple because of the use of efficient components that are not complex. It should be described that the use of tube joints in this company needs a artist offer, and therefore in the process of developing and finishing have to be careful of artist and light. Particular series 35W Pipe Power Take Power Firm can be seen in the following figure out.

 

    Part List :

  * R1=470K 0,5W
  * R2-5= 2K2 0.5W
  * R3=150K 0.5W
  * R4= 220K 0.5W
  * R6-10= 56K 0.5W
  * R7=3.9K 0.5W
  * R8= 220R 0.5W
  * R9= 1M 0.5W
  * R11= 39K 1W
  * R12-23= 180K 0.5W
  * R13-21=820K 0.5W
  * R14-22=5K6 0.5W
  * R15-20= 680K 0.5W
  * R16-19=100K 0.5W
  * R17-18=3K3 1W
  * R24=470R 2W
  * TR1-2=470R 1W Variable (adj. 270Ω)
  * C1-3-6-7=0.1uf 630V
  * C2=220pF 600v
  * C4-5=16uF 550V
  * C8-9=0.1uF 630V
  * C10-14=0.47uF 630V
  * C11-13=25uF 40V
  * V1=E80CC
  * V2=E80CC
  * V3-4=EL34
  * Rectifier tube= Z2C
  * T1=Audio Transformer for 2x EL34 Push Pull

LM4652 Class D Amplifier

The mixture of the LM4651 car owner IC and the LM4652 energy MOSFET Category D energy firm IC provides a top excellent firm remedy, appropriate for self-powered sound speakers, subs and excellent car enhancers. The LM 4651 is a completely incorporated traditional beat size modulator (PWM) car owner, containing undervoltage, short routine, overmodulation, and heat shut down security build. The IC features a stand by operate which ends down the beat size modulation, reducing provide current.

The LM 4652 is a completely incorporated H-bridge Power Mosfet IC in a TO220 energy program. The IC has a built in heat range indicator to aware the LM4651 when the die heat range surpasses the tolerance restrict. Used together, the LM4651 and LM4652 form a simple, lightweight, effective, top excellent energy sound firm remedy finish with security, normally seen only in Category AB amps.


The highest possible performance of this routine is 85% at 125W with a stand by attenuation greater than 100dB. The THD at 10W, 4 ohms, 10 - 500Hz is max. 0.3%. The provide current can not surpass ± 22V.

For the best performance a appropriate preamplifier is required. With the addition of a preamplifier the obtain of the energy level can be reduced to improve performance. The obtain should be set to 10 V/V enabling for low obtain on the Category D level with a total system obtain great enough to be a finish remedy for line level resources.

The feedback narrow used here does not clearly increase THD performance but will help to maintain a flat regularity reaction as the Q of the outcome narrow changes with fill impedance.

40W HiFi Amplifier

Circuit Off 40 W Amplifier

Amplifier described here are intended for usage view ralatif output power requirements are. Output stage consists of two types of power transistors 2N3055, guarantees reliable components. At first glance it appears that Level of output is not symmetric because the T15 and T16 tansistor is of NPN type, but a second glance will show that in fact half the top NPN transistor consists of super T11, T13, T55, while the bottom half consists of super PNP transistors T12, T14, T16. 

Power Output is 40 watts at 8 Ohms or 60 watts at 4 Ohms with Distortion no more than 0.01% .Along the stride frequency of 20 Hz ... 20 KHz. Maximum power at the output signal from a severed is 45 watts at 8 Ohm and 4 Ohm 65watt on. Sensitivity put it is 800 (850) mVeff to 40 (45) watts at 8 Ohms and 700 (725) mVeff to 60 (65) watts at 4 Ohm. Karaktearistik frequency is in the 1 dB from 15 Hz to about 100 KHz. 

Due to the high current gain (not less than 200 000 x), then the output stage has a low quiescent current (though not critical) that is 25 ... 50 mA. Even with P1 set to minimum resistance of the spectrum analyzer is connected at opposite prototypes we showed that very small defects. Quiescent current is set by P1, with universal multi tester (stride-mV DC) is connected between the emitter and collector TI5 T16.So the flanking strands connected resistor R25 series ... R3O. A voltage of 33 mV occurs at 50 mA current, is provided by the PCB for this project, but it can be built using the PCB holes. It is advisable to arrange Lay out the components as possible congruent with the circuit diagram. Heat sink 1.5 ... 20 ° C / w is required for T15 and TI6, do not forget mikanya coatings ....

Power Supply

Power Amplifier 70W with STA550

Features :

• POWER AMPLIFIER MONOCHIP BRIDGE STEREO AMPLIFIER FOR BASH® ARCHITECTURE
• 55+55W OUTPUT POWER @ RL = 4/8 W, THD = 0.5%
• 70+70W OUTPUT POWER @ RL = 4/8 W, THD = 10%
• HIGH DYNAMIC PREAMPLIFIER INPUT STAGES
• EXTERNAL PROGRAMMABLE FEEDBACK TYPE COMPRESSORS
• AC COUPLED INPUT TO CLASS AB BRIDGE OUTPUT AMPLIFIER
• PRECISION RECTIFIERS TO DRIVE THE DIGITAL CONVERTER
• ON-OFF SEQUENCE/ TIMER WITH MUTE AND STANDBY
• PROPORTIONAL OVER POWER OUTPUTCURRENT TO LIMIT THE DIGITAL CONVERTER
• ABSOLUTE POWER BRIDGE OUTPUT TRANSISTOR POWER PROTECTION
• ABSOLUTE OUTPUT CURRENT LIMIT
• INTEGRATED THERMAL PROTECTION
• POWER SUPPLY OVER VOLTAGE PROTECTION
• FLEXIWATT POWER PACKAGE WITH 27 PIN

Schematic

Pinout

Front view

LM12 150W Simple high power amplifier

Using LM12 energy functional firm made by Nationwide Semiconductor can be built audio energy firm that can charge a highest possible energy of 150 h.
Maximum permitted heat range of the result transistors is assessed for energy limiter control routine which is part of the energetic security protection. Strength result level is not linked with that pin until the current does not surpass 14 V (± 7 V). When the nick heat range goes up above 150 ° C, result is instantly turned off.
Circuit plans indicates the use of two diodes in incorporated result that are designed to prevent the result current trip surpass the supply current when the result level is incorporated inside the contretemps and bypass the result fill is mainly inductive.

Specification

Max Out : 150W  (4Ohms) / 200W (2Ohms)

Distortion : 0.05% (4Ohms) / 0.1% (2Ohms)

Idle current : 65 - 100 mA

Notes:
L1 coil has 40 turns of enamelled copper wire 1 mm in diameter, wound on the resistance R4. It mainly uses the correct operation of the amplifier with capacitive loads reaction, such as speaker separation filters.
If using a LM12CL is advisable to use a toroidal transformer which provides in secondary 2 x 22 V (in which case the power of 150 W can be obtained only on a 2 ohm load).
Integrative be screwed on to a large thermal radiator, which should be very well insulated electrically.

LM1875 20W Audio Power Amplifier

Description

The LM1875 is a monolithic energy firm offering very low distortions and top quality performance for consumer audio programs. The LM1875 provides 20W into a 4Ω or 8Ω fill on ±25V resources. Using an 8Ω fill and ±30V resources, over 30watts of power may be provided. The firm is designed to operate with a minimum of exterior elements. Device overburden protection is made up of both inner present limit and heat shut down. The LM1875 design uses advanced routine techniques and handling to achieve extremely low distortions amounts even at higher result energy amounts. Other excellent features include higher gain, fast number rate and a large energy bandwith, large result current move, higher present capability, and a very large supply range. The firm is inner paid for and constant for profits of 10 or greater

 

Schematic

 

PCB. solder layout

 

 

PCB. component layout

Mosfet Legend Stage Amplifier by Dr. Borivoje Jagodic

Schematic

PCB Layout

Specification :


Output             :   500W RMS at 8 Ohm
                           750W RMS at 4 Ohm
THD                :  0.18 %  Max
                           0.01   at 400W
                           0.008 at 300W
Freq Respons  :  15Hz - 130 KHz
Input Voltage   :  1.55V at Output 500W 8 Ohm
                          1V      at Output 750W 4 Ohm

300W Audio Amplifier With MJ15003 and MJ15004

Power amplifier with high-pass and low-pass filter. Supplied 60V DC 35A for Stereo Consumtion, this circuit can make about 300W Power of sound. Opamp NE5534 is arranged as a differential amplifier, output of NE5534 is applied to drive stages MJE340 and MJE350 via R6 from pin 6. The output amplifier proper consists of drive stages MJE1530 and MJE1531 and Final Complementer power transistors  MJ15003 and  MJ15004, which have been arranged as symmetrical power darlingtons.

Schematic

PCB Soldering Side

PCB Component Side

170W Class D Audio Amplifier Solution

Description

The IC collaboration of the LM4651 car proprietor and the LM4652 power MOSFET provides a top excellent, Classification D striper presenter company choice.

The LM4651 is a absolutely included conventional beat broader modulator car proprietor IC. The IC contains short world, under present, over modulation, and warm turn down protection develop. The LM4651also contains a life operate which comes to an end down the beat broader modulation decreasing supply present. The LM4652 is a absolutely included H-bridge power MOSFET IC in a TO-220 power bundle. The LM4652 has a warm variety sign designed in to inform the LM4651 when the die warm variety of the LM4652 is greater than the persistence. Together, these two IC's form a simple, stream-lined greater power music company choice complete with protection normally seen only in Classification AB amplifiers. Few outside components and little information between the IC's keep the PCB area small and helps in EMI control.

The near rail-to-rail switching company significantly helps the efficiency when in assessment to Classification AB amplifiers. This top excellent choice significantly decreases the warm damage size when in assessment to a Classification AB IC of the same power. This two-chip choice is the best possible for controlled sub sandwiches and self controlled music system. 

Features

Conventional pulse width modulation.

Externally controllable switching frequency.

50kHz to 200kHz switching frequency range.

Integrated error amp and feedback amp.

Turn−on soft start and under voltage lockout.

Over modulation protection (soft clipping).

Externally controllable output current limiting and thermal shutdown protection.

Self checking protection diagnostic.

Key Specification

Output power into 4Ω with < 10% THD.	170W (Typ)
THD at 10W, 4Ω, 10 − 500Hz.	< 0.3% THD (Typ)
Maximum efficiency at 125W	85% (Typ)
Standby attenuation.	>100dB (Min)

Low Voltage Mini Stereo Amplifier

The circuit is easy to build, it can be done easily on the edge strip, although I never tried to be honest. As always make sure that you insert TDA2822M chip on the board the right way and you get electrolytic capacitors in the right direction, I recently blew one of the greatest speakers I mentioned above. Nothing else is particularly critical, as the amplifier to operate with the lowest resistance and capacitors, you can buy. A log-log pot is recommended because it allows easy adjustment of volume. Everything else can be added as you need to know the tone controls, etc., but it is unlikely that you'll need something else for simple systems.

Voltage range betwen 1.8 V - 18 V

1500 watt power amplifier

Class A Buffer pre-amplifier

A unit which is often useful, if we need to isolate, in sound circuits, two stage between them. Then we can use this circuit which has an amplified unit, which gain X1, we do not use total negative feedback, only local, with the result that distortion remains at a very low level. Matching must be done with great care to the types of transistors, resistor between them. There must also be thermal union between the transistors, as well as the diodes LED D1-2 with the transistor Q5 and Q2 respectively

List of Part

R1= 560 ohms	C1-2= 100uF 25V	Q2-4= BC560C
R2=  47Kohms	C3-4= 47uF 25V	Q3-5= BC550C
R3=  2.2Kohms	C6= 1nF 63V ΜΚΤ	Q6= BC560C
R4-7= 1Kohms	C7-8= 100nF 63V ΜΚΤ	Q7= BC550C
R5-6-10= 100ohms	C9-10= 100nF 63V ΜΚΤ	J1= 10pin Connector
R8-9= 47ohms	D1-2= LED RED 5mm
R11-12= 10ohms	Q1= BF 245C	All Resistors is 1/4W 1%

SYMMETRICAL HIFI POWER AMPLIFIER

DESCRIPTION

Characteristic Summary : power amplifier mosfet complementary symmetrical hifi complete with very height output
power and good dynamic, because real delay of the way in level of end exploited for
compensation of frequency to be obtained absolute stability

Output Power : 140 watt at 8 ohm each chanel / 180 watt maximum at 8 ohm
180 watt at 4 ohm each chanel / 250 watt maximum at 4 ohm

Distortion : less than 0,01 % at 140 watt and 8 ohm / at 180 watt and 4 ohm

Input Sensitivity : 1 volt-ef for 130 watt at 8 ohm

Input Impedance : 25 Kilo-ohm

Frequency Characteristic : 4 - 50000 Hz (with source resistance 600 ohm)


BLOCK DIAGRAM



POWER SUPLAY


SCHEMATIC DIAGRAM



COMPONENT LIST




LAYOUT PCB (BACK SIDE)



LAYOUT PCB (FRONT SIDE)