A good DC voltage regulator able to provide more than 2 Amps @ 40V can be used. But one problem, when i play music it condinue less than one minute then the power transistors are blooming very hot and a loud noise producing . Temperature Gain & Return Loss Gain vs. APPLICATIONS sir, To avoid using positive feedback in the output stage is it beneficial to add two more transistors connected in such a way that the Darlington’s would be made of three cascaded transistors instead of the usual two. I want finish my amp when clear this problem. This amp uses TIP 142 and 147’s in it’s power output circuit. It would be a lot more interesting if the input complementary pair were also FETs and the output was expanded to 2 or 3 pairs of MOSFETs to give 100 to 150 watts. I build this and it sounds good. I checked the traces for shorts but I found none. Sir i place tip142 and 147 on a heatsink, suddenly the loud noise stoped. By shorting output transistor base is not having any response your driver transistor may be defective. and the amp is running good trouble free since 1999. one major problem that is the input of both chanells are amplifying through both channells. A complementary Class AB push-pull stage is built around the transistors Q1 and Q2 for driving the loud speaker. Press Esc to cancel. seetharaman sir,i have three amp i am using in this time as you said this TIP142/147, CIRCUIT IS same and modified version of philips circuit 1972, but believe me sir the low is very good in bd182 circuit in compare to this 150 watt circuit,am currently using it, Check TIP147 collector-emitter must have become dead short check all your wiring and polarity of capacitors, if they are interchanged( plus- minus polarity of the capacitor) it becomes a link wire instead of an DC isolator. max. Thanks, 100% working Stereo complete PCB layout of this amplifier including power supply on the single board is available along with all the building instructions and online skype support only for 5 US dollars. Thank you. C6 and C7 must be rated 50V; other electrolytic can be 10 or 15V. • Continuous reverse voltage: Please use any circuit which uses dual supply(both plus and minus voltage with zero volt reference)To get +12 volt use 7812 12 volt 3 pin regulator ic, for positive supply and to get -12volt use a 7912, a 3pin negative voltage regulator ic. 142 n Tip 147.Boundles of output power.I check the sound quality of this amp. Mosfet Amplifier Circuit – This circuit is designed using two Mosfet’s and one transistor; which makes it an easy to build circuit. I made 60w inverter ckt but am getting 160v o/p sir plz help me and send me a 100w transister model inverter ckt with out ic ..sir plz help me…. OKC, Sir I’ve built this amp but I’m hearing a loud hum. CircuitsToday.com is an effort to provide free resources on electronics for electronic students and hobbyists. 3.USE LARGE HEATSINKS FOR TIP142AND TIP147 ATLEAST 4*6INCHES AND FOR TIP41C USE 3*3INCHES OR CLASSIC HEATSINK OF 12″*4 INCHES FOR STABLE OUTPUT Wen I read d value across d two resistor with my dmm it showed me 3.35k pls sir suggest me on wat to do.could it b dat my resistor combination led to d@ problem? Using TIP142GOSND and TIP147GOSND both rated for 100v@10amps, I estimate the supply would require around +/- 90vdc. Hi mr seetharman thanks alot for guiding me up to this point the circuit is working but i used +/-22.5V to power the amplifier and the output was low,i also noticed that the TIPs are not heating as expected,i used a DVD as my audio input. and i ll show you that amp. It can deliver 40 watts of output power to an 8 ohm speaker. You have to use 25 – 0 – 25 volt @ 5 AmpAC transformer with bridge rectifier and filter capacitors to get both +ve and -ve power supply required for the amplifier. i think than your amp go on without any problem ,i have made these changes in my circuit,and no problem. Can some one point me to the PCB, sub-woofer box measurements? and low frequency response using jrc 4558 ic as tone control..i used it for lead guitar, bass guitar & keyboard…i even use tip41/tip42 & tip2955/tip3055 as darlington pair as output x’sistor with supply voltage of +/-40vdc @6amperes…using dual voice coil speaker @ 450watts 4ohms…heat is minimal low noise no hum…, 150 watts tda2030 / tda2050 subwoofer amplifier circuit now available here. To allow the amplifier in SSB-modulation some extended PTT time-on the RF-sensing unit (Q2->relay) has to be increased. transformer is 28-0-28,10A dual power supply.My problem is switch on the power supply ,I heard the sound on the speaker is like feedback between the mic and speaker….woooooooo….so you help to rectify the problem. Iwant to finish my circut. Messers! Dear Seetharaman Sir Our webiste has thousands of circuits, projects and other information you that will find interesting. SEPARATE TRANSFORMER IS THE ONLY RIGHT SOLUTION. You must replace bc558 transistors before using this supply. Use current measurement in the collector circuit of Q1. i use dual power supply. It is okay to supply 56-0-56V in this circuit? Low Cost 150 Watt Amplifier Circuit. nstead of been in series with r4.after correcting it it works fine.u d best, thank u sir 4 d response I will check dem n tell u d observations. Thank you very much. Iam using 35volt 5amp dual supply and 10″ 8ohm jbl subwoofr. Sir plz sugest me a suitable bass/treble or 3 band graphic equaliser cir.diagrm for this with use of 18 inch horn. 3: use 0.5ohm resister ,in place of 0.33ohm and add 680pf in tip142/147 I want to make 5.1channel150 watt amplifier. Featuring 4-way protection circuitry, and … but this cost just 200 rupees per channel with big heat sink. Can i check it using Multisim? 1.SUPPLY SHOULD BE +/-40-0-40 TO +/-45-0-45 VOLTS WEATHER REGULATED OR UNREGULATED. sir plz help me what should I do, i have to submit this project on tommorrow. Input signal is applied to the base of Q5 through the DC decoupling capacitor C2. Its working fine. Where should I check for pre-amplified signal and where should I check for drive signal from TIP41C ? actually this amp delivers actual wattage of 150watts on 4ohms speakers, and 100 watts on 8 ohms. Thanks for your guide line. 10 Watt Mosfet Audio Amplifier. . ;then try out this. I was thinking to build a set of mono block amplifiers, not too fancy but nice enough for my Dynaudio Audience 42W speakers. use 33 ohms 10 watts resistance in positive and negative supply rail before switching on again after thoroughly inspecting the assembly again. My first circuit worked perfectly and what if the fuse is removed, will cause the transistors to over heat. God bless u. Diodes D1 and D2 biases the complementary pair and ensures Class AB operation. Thanks mr seetharman for your advice and am doing it but i need image of the pcb connection of both the power supply and the amplifier on my email if possible the videos of the connection.please sir i need this because i want to avoid loss of some components due to connection mistakes because we have very limited components in the market. now the dc voltage is +60/-60 and 0(GND) after bridge rectifier. GaAs pHEMT MMIC 0.25 WATT POWER AMPLIFIER DC - 40 GHz Output Return Loss vs. Type above and press Enter to search. Is it missing or not needed for some reason (maybe the diff amp)? supply voltage? If current gain of a transistor as per data sheet is say 100 at 1Amp. Each First Watt piece is a unique design and is “best” in some particular way. please if any one to know how use fet in the transister circuite rehmani sadiq lahore pakistan. try fixing jumper wire between Q1 and Q2 base and switch on and try. THE CARE SHOULD BE TAKEN THAT IT SHOULD NOT EXEED 45 VOLTS,FOR BETTER RESULTS THE SUPPLY SHOULD BE BETWEEN +/-40 TO +/-45 VOLTS . it doesn’t end there, it still over heats and the same thing happens again……Anyway,tip 147 doesn’t heat at all. I give +/-35v 5amp power suply and 10inch 4ohm woofer. HELLO THERE, FOR BEST RESULT FROM THIS AMPLIFIER USE: Hello..I have plans to build a good sub-woofer. https://www.youtube.com/watch?v=iEwyIcbOqBU&feature=youtube_gdata_player, Hello Sir The use of a differential amplifier in the input stage reduces noise and also provides a means for applying negative feedback. I ask because when I first got the amp I didn’t have to turn the gain and master up as much as I do lately. http://circuitschematicelectronics.blogspot.in/2012/06/400w-amplifier-with-2n3055mj2955.html. We just need a 3.5 mm audio plug and a computer with sound recording software. 40 Watts Amplifier using TDA1514 – TDA1514 is a high performance hi – fi amplifier from Philips. It is my plan to try to build this amplifier, however I have got some questions that I hope you answer: And I also want a perfect amp circuit diagram in one channel with parts list include watt which produce 200watt with deep bass. kindly suggest me. The P1000X5 1,000 Watt full-range 5-channel is the one-and-only amplifier you will need to run your entire system. thanks. If you cannot measure milli volt accurately. C5 ………………2200µF 50V Electrolytic Capacitance. These amplifiers have a wide range of applications, they can be used in many circuits. . Yes I have the original Universal Pre amplifier appeared in 1972 Philips Application book. How about it ? Transistor Q3 drives the push-pull pair and its base is directly coupled to the collector of Q5. 1. Single-ended 5-watt, 1-channel 1x8" Guitar Combo Amplifier with 3-band EQ, Tilt Control, and Switchable Low/High Power Output Rated 4/5 9 reviews Write your review Item ID: ORI5C $ … It makes the sound quality is very good. How much supply DC votls and Amperes need for Single pair and combined pair? sir what other component can you use in place of TIP147 and TIP142 and please sent me the pcb of the project, Sir, I dont know what happent? This is a review and detailed measurements of the new Gustard H16 balanced headphone amplifier. Noise is removed by replacing 220ohms resistor with 550 ohms resistor. Mate, i don’t know if there is something wrong. http://www.eleccircuit.com/boosting-regulator-current-for-ic-78xx-by-mj2955/. THANK you for your response sir. I use 2 nos of 0.33ohm 2watt in series and connect parallel with another 2nos of0.33ohm 2watt in series. I will get a bigger heat sink to try and see the results. I am facing a problem when the amplifier’s sound is low then it does not give a clear output it gives me a distorted output and when i increase the problem it gets fine… Anyway, for low power applications like this, it’s quite fine. .sir. Please help me sir? Please help me sir. R3 should be adjusted for 21 volts at the + side of C5, R4 should be slowly adjusted til there is 20 – 50 ma current flow into the drain of Q2 with no input signal. my transformer is 15 0 15 6ampere. Mostly transistors might have blown. Sir what should be the heat sink size?and is it safe to use 4ohm woofer with +-40v supply? Sir i did this amp for stereo application 1 month ago. THAT is 30 X 1.414 = 42 volt s DC. The second stage is the driver stage consisting of transistors Q3 and Q4. We therefore want to make it easy for you to compare our products to any brands on the market. But i have 6A10 DIODE can i use it, or will the current be too high? plz help sir! I did some reseach and what I learnt so far corroborates my impression that this circuit is well designed and worthy of a try. They look alike because they all use the same basic chassis and power transformer. 1) To meet my criteria I changed parts of the circuit so that the differential input is made of NPN transistors instead that are connected between 0V (common, ground) and the +45V. for TDA2050 it is ok as 44volt dc is max allowed. What can i do for this. Hi Ali for your sub woofer speaker use motional feed back amplifier appeared in our column earlier. now i use single tranformer for two(stereo) channells. you must replace your both the transistors …… thats not the issue of heatsink. FEATURES TIP41C (no heat sink attached) feels cold, TIP142 and TIP147 along with the two 0.33 ohm 7 W resistors are HOT. USE GOOD QUALITY SPEAKERS ,YOU ASKED ABOUT FREQUENCY ,IT DOES NOT MATTERS JUST FIX IT UP ON ANY AUDIBLE POINT , I HVE USED THIS CIRCUIT IN 2006,SINCE THAN IT IS WORKING AMAZINGLY.I HAVE USED 30.0.30/ 10AMP TRANSFORMER FOR SUPPLY FOR 150+150 WATT. if yes wat would be the changes to b made?thanks. I have a (+45, 0, -45) unregulated power-supply, should I test with it or solve the issue at 12 V first ? Hey guys have you already tried the PCB design of this schematic by jspayne? How much DC you are feeding to amplifier. This IC has many features like thermal shut down, low THD, short circuit protection etc. Philips Semiconductors Product specification sir i have also observe that using 2N3773 TR,is gives more loud and low frequency in compare to 2SC5200 TR,,I tried many circuit. I’m making a subwoofer amp by the way . Ptot total power dissipation Tamb = 25 °C; note 1 − 500 mW You can expect such a power supply design very soon here in the power supply section. I am using preamp of philips amp made by mr. M.D hall,and it is giving terrific sound,with almost every amp,i have used it with more than 20 amps,gives terrific sound.. in this 150 watt circuit i used 0.5/5watt resister,and rest circuit is same as above believe me than tere is no problem in your circuit, hello sir ,i made the jspyne circuit same as shown on site but it decreases the sound output.but your circuit has no problem iam using it since 2009 and believe me it is giving sound trouble free on 45-0-45,10ampre supply and 150watt load of speaker. 1N4007 is 1A, 1N4148 is 200mA high speed diode. I hopeing ur comment. 1. that is how they were when i bought them from the market. Please clear my doubt sir. I have +35v/-35v 5amp duel power supply. Sir, I built the circuit but I’m having problems, C2, C3 and R2 blowed up twice. hi mr seetharman, i powered my amplifier with -46/+46 volts power supply that i made using the 2 15-0-15 3A transformer and the 220 ohms resister got burnt so i am asking my self could it be that the resistance was too small or the watage i used and i have bought half watts instead of quarter watts please coment on this. 2. if i place it what happens? For 400w you need another circuit. It is customary to keep the gain around 50 in the output amplifier (for better frequency bandwidth)and increase the input through pre-amplifier to achieve the same output. Sir i again try it. I also check the diodes it is working perfect. Mosfet is a good choice for building linear amplifiers owing to its lesser load, and any amplifier made using it is called a Mosfet amplifier. 2. A thorough check is required including D1 & D2. The aim is to emulate an infinite impedance theoretically increasing the common mode rejection ratio to infinity? Sir please replay me sir. Tip 147 is not heating. sory for the mistake the speaker impedence is 4 ohms please read my coments below this, i used the lower voltage because some of my components were at first blowing and burning with higher voltage but i think i can now increaase the voltage thanks to mr seetharman for your wonderfull work. Now there is no sound in my circut. I can’t find speaker of 8 ohms with 150 W. Is there any alternative? i use independent circuit of output transistor pin short protection for each channels. in place of 0.33, 7 watt resistance can i use any other watt and value? Typically, power amplifiers develop 25–30dB of voltage gain. Please help me sir……. I hope you could help me with solving the problem. The TDA2050 is a great sounding chip amplifier with lots of power. Now i waste somuch money to build this amp. i’m a beginner but is vin the audio signal ? Yes you can use 6A5 it is 6Amps 500v PIV rectifier. check the wiring and component values and polarity of each component used. Place a wire link between Q1 and Q2 base and energize and see if not getting heated up. 3. AND also 2nd channell input also amplifying through both channels. I think that my circut is perfect becouse i chek it somany times using the diagram. C5 needs be no more than 35 volts. for 60 volt plus minus this amplifier will get burnt you may have to replace all the semiconductors and capacitors with higher voltage rating, which are very expensive. info. Please help me siq. Naturally, Q3 has been replaced by a PNP transistor. SPEAKERS SHOULD BE GOOD QUALITY AT LEAST 12″ 100-150WATT HANDLING CAPACITY Hello, I can’t seem to find the TIP142, so I ordered TIP131f, is it ok ? By deleting fuse your protection to the amplifier is lost in the event of speaker leads are (amplifier output) shorted both the output darlington transistors will blow off. But i have 6A10 DIODE can i use it to replace 6A5. I looked over and over again over the circuit but I cannot find C8. I am geting confused as the pre amp has a section of 5band +/- 10db Graphic eq of 100,400,1k,4k & 12khz also with a bass boost,so if i boost the 100Hz with the Bass boost ‘ON’ that point of time the Speaker need a more wattage as well as the Amp…so what would be the proper wattage of the Speaker to use i am getting confused. Have you taken care of short length of DC power supply cable should be less than 2 inches. You can use with creative commons rights. Hello Sir, where/how should i connect the add’tl 680pf capacitor in tip142/147? How can i connect a 4ohm woofer in a 8ohm receiver. 1> 8 Ohms 150w Or 4ohms 150(If 8 Ohms150,i’ll use 4Ohms 300w) You can not obtain 15 watts from this specific amplifier. 3. I have a couple of 32-0-32 volts @ 4Amp and 40-0-40 volts @ 5Amp trafos lying around at home. • Repetitive peak forward current: Here at Rockville we offer the best value in car audio. I CAN USE 2N3773 =IN PLACE OF 2N6254, Power 1,000 Watt Class-ad 5-Channel Amplifier T1000X5ad The Power T1000x5ad is an compact, Class ad 1000 Watt multi-channel amplifier. I’m very sorry sir,I miss spelled that. Our webiste has thousands of circuits, projects and other information you that will find interesting. can i use IRF540,IRF9540 instead of IRF530,IRF9530? NOTE: THOSE PEOPLE WHO DO NOT HAVE HEAVY WATT SPEAKERS USE LOW CURRENT SUPPLY ,BUT THE VOLTAGE SHOULD BE SAME. I’m hoping your replay, have a good day. Capacitor C8 is the input DC decoupler, R1 limits input current and capacitor C1 bypasses unwanted high frequencies. In terms of audio quality, the most important thing is CLEAN and BALANCED sound. Hello sir, I can’t seem to find the 0.33 ohm resistor in my country due to it’s high power rating and I don’t wany to order it online as it would be too costly, can I ommit it or replace it by a self made wire wound which I won’t know it’s power rating, or can you suggest other solutions ? Sir,the transformer shown in the power supply has a 30-0-30 output,can you explain how it get increased to 40-0-40 V at o/p after filtering. But i couldnt get tip147 could u pls tell me which i can use as a replacemant, and also the 30 0 30v transformer is expensive here, is there anyway i can use the cheaper one… And again the 10k potientiometer how do i connect it to the circuit, Chris if you read past comments there are others who found alternative transistors and regaring volume pot is said to put it in series with input. [CDATA[ google_ad_client = "pub-8174193217694635"; google_ad_width = 468; google_ad_height = 60; google_ad_format = "468x60_as"; google_ad_channel =""; google_color_border = "366c9c"; google_color_bg = "ffffff"; google_color_link = "ff6600"; google_color_url = "666666"; google_color_text = "333333"; google_ui_features = "rc:10"; // ]]> In the 10w amp q3 and q4 source should be connected instead source to drain as it is no o/p is obtained. I test it with two computer power supplies (+12, 0, -12). Is this maybe I should have a good earth to the circuit? An 8x4x4 inch finned Aluminum heat sink will do. You may have to reduce the power output to <100watts with TIP131. IFSM non-repetitive peak forward current square wave; Tj = 25 °C prior to please i have failed to get the speaker of 8 ohms,please some alternatives. it works good. I have the amplifier board using transistors TIP143andTIP147 by using Visit our link Please help me. The First Watt J2 makes 20dB. hi, is anybody able to send me a 40W ciruit? thank u very much for the reply.i have done the modification and it can now pick the sound of the mp3 at a lower volume. -also, the voltage specification of the capacitors. before making this..i asked an shopper about 150 watt 5.1 amp. When give supplay to my circut a loud noise producing. You can improve the gain by reducing R2 to 220 ohms. Use at least a 6 sq in heatsink on Q2/3. Sir what is the minimum voltage for this amp? Please sir .. Sir Hence A little help would be appricated. Thank you sir for the PCB layout God Bless. Thank in advance. This circuit is an audio amplifier capable of delivering a decent output power with a minimum no: of parts, with considerable sound quality. Description. All capacitors are rated 50 V, R2 is rated 1/4 W. I’m using a 45 V dual supply. SYMBOL PARAMETER CONDITIONS MIN. Contact me. 1: 40-0-40 VOLTS TO 42-0-42 VOLTS 8 AMPERE DC POWER SUPPLY,THAN USE 12″ 4-8 OHM SPEAKER POWER HANDLING UPTO 150WATTS. so my question is, could it be the low voltage that i used or my TIPs are dead? Minimum is + – 30Volts DC and Maximum is + – 45 volts DC with the components indicated. No. Hello sir i have a concern with the output because when the volume is in the maximum level it will distort or creates noise. You can use any 200PIV 5 to 10 amps rectifier 4 nos or a single 6 amps 400PIV bridge rectifier. I have A 50 Watt 6 ohm subwoofer with 5 speakers 50 watt 5 ohm each. I also think, using PNP transistors for a differential input is quite uncommon today. with + – 30 volts DC you will get 85 watts into 4 ohms load and 42 watts into 8 ohms load. HELLO THERE , I AM BACK,LET ME HELP YOU ,FIRST OF ALL THE ABOVE CIRCUIT DIAGRAM IS COMPLETELY TESTED AND RELIABLE FOR TROUBLE FREE SOUND PLEASE CONSTRUCT EXACT CIRCUIT AS GIVEN,AND • Repetitive peak reverse voltage: is that the nature of these transistors? Proper decoupling and high value filter capacitors and proper layout and earth loops are a must to avoid cross talk between channels. Please, am working presently on this amplifier.. Please help…. 4 ns 2:IF YOU ARE USING 40-0-40 VOLTS TO 42-0-42 VOLTS 5 AMPERE DC POWER SUPPLY FOR BOTH THE CHANNELS THAN USE 12″ 4-8 OHM SPEAKER POWER HANDLING UPTO 100-150 WATTS. I want to build this in my school exhibition. The transistors TIP 142 / Tip 147, would you recommend them in TO-247 or TO-220 housing? If it is not achievable check the complete wiring and for a defective component, isolate replace and rectify. TDA2050 IS 30 WATT IC,SO THE SPEAKER WILL NOT WORK. Note:- We have explained how to create a schematic of this circuit and its PCB using an online EDA tool – EasyEDA. So what is a wise decision? use only 24 volts transformer. Please. if output transistors are getting heated up and only the sound is very much distorted check both the diodes. The RF sensing circuit is sensitive enough to react on .5 watt easily. Hi Mr. Seetharaman, the amplifier is now working, but tip 142 becomes very hot when i power it, and the sound eventually becomes noisy and finally diminish.in any case i am using c558 instead of bc558. I hope ur replay… Thankx…, Sir i,ve found my flaw n its r2 conncted in d junction of r8 I Sir I am very much interested in assembling of stereo sound systems with high output in RMS ratio. There is no such thing as a heat sink that is too large. Temperature Noise Figure vs. The 5 main channels in a 5.1.2. Note Or send it to my Email address (princestechnology@gmail.com). Use 3nos 10K 1/2 watts in Parallel. you will enjoy its best quality sound with thumping bass and clear high notes, i have a lot of qunatity fet .iwant to use as transiter of fet . It is on kind loan from a member. Thank you for sharing. that is i gave the supply for both channels from one tranformer. In this tutorial, I’ll walk you through the amplifier design process as I build a 25 Watt stereo amplifier with the TDA2050.First, I’ll show you how to calculate the voltage and current requirements of your power supply, and show you how find a properly sized heat sink. surge; see Fig.4 Can i use 1N4007 Doide to replace 6A5 doide in the power supply circuit? 0.33Ohm 10 watt(connected to TIP 147) resirtance very hotted up and no output. I need one. Please i need other Doides for replacements. I am attempting to build the amplifier with my modifications. You can measure the milli volt drop across R8 and set it for say you are using 0.47 ohms then 0.47 * 0.06A = 30 to 40 milli volt and set for this value. The sound is superb. The TIP141 gets warm, TIP41C reflects wind like sound in the speaker, TIP147 is cool and on power up, the speaker cone moves forward and keeps it’s position until power is removed. If you don’t want, then no problem because this amplifier circuit has enough punch with in it.eval(ez_write_tag([[580,400],'circuitstoday_com-box-4','ezslot_10',110,'0','0'])); R1………………2K2 1/4W Resistance