they says 3500 rupees for 6 channels. If it is not achievable check the complete wiring and for a defective component, isolate replace and rectify. You can improve the gain by reducing R2 to 220 ohms. I’m making a subwoofer amp by the way . Hiii sir I like ur projects very much.. 1998-document.write(new Date().getFullYear()) The DXZone.com - Terms of Use, Copyright & Privacy Policy, [ Hits: 1072 | Votes: 3 | Rating: 6.67 ], [ Hits: 17590 | Votes: 28 | Rating: 5.82 ], [ Hits: 5593 | Votes: 4 | Rating: 5.75 ], [ Hits: 3944 | Votes: 6 | Rating: 4.67 ], [ Hits: 1590 | Votes: 4 | Rating: 3.25 ], [ Hits: 1751 | Votes: 3 | Rating: 4.33 ], [ Hits: 8116 | Votes: 3 | Rating: 6.33 ], [ Hits: 13845 | Votes: 21 | Rating: 3.95 ], [ Hits: 2266 | Votes: 6 | Rating: 6.17 ], [ Hits: 3127 | Votes: 4 | Rating: 8.75 ]. Visit our link Also, I can’t find the 3.3 K in 1 W packages, any solutions ? I dont get 0.33 ohm 7watt. 8ohms 150w or 4ohms 150w? 1> 8 Ohms 150w Or 4ohms 150(If 8 Ohms150,i’ll use 4Ohms 300w) But a proble is that, After 5 minute when play music the power transistors are damageing. a gain of 100. now i use single tranformer for two(stereo) channells. i need to know that what is the problem exactly ? power amp. If it is still getting heated up check TIP147 for collector emitter short. so my question is, could it be the low voltage that i used or my TIPs are dead? The DXZone is the largest human created and maintained library of web sites dedicated to Amateur Radio, currently lists 20.000+ links organized into 600+ categories and subcategories. okay, thank u very much. Type above and press Enter to search. Tip 147 is not heating. . Contact me. 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. Seetharaman, Thank you for your response, what about 1N5408 Doide, can it replace 6A5 Doide? use only 24 volts transformer. OKC, Sir I’ve built this amp but I’m hearing a loud hum. if output transistors are getting heated up and only the sound is very much distorted check both the diodes. Please sir .. Sir finally i found the solution for stereo from single transformer, Spectral DMC-30SV Series 2 line preamplifier. eval(ez_write_tag([[300,250],'circuitstoday_com-medrectangle-4','ezslot_4',109,'0','0']));2. For 400w you need another circuit. but this cost just 200 rupees per channel with big heat sink. It is okay to supply 56-0-56V in this circuit? i found the problem with power supply. Thank you once again. If you are in search of PCB of this circuit then I am not real knowledgeable on SS…I do have an Ampeg B3158 bass guitar combo. The “Stereo Amp” will be identical with “Mono Amp” circuit. can i use a 4ohm speaker instead of 8ohm ,which is written in the first figure?or i need some modifications? Check the healthiness of TIP147. This will help others to take care and successfully construct the amplifier without any doubt and safely investing their money on the project. and i use stk 4141 for center and rears. The first discs entered the marketplace in 2000. Hi, i wanted to ask, can this circuit be used with an antenna rather than a speaker??? Please i need ur reply as soon as possible my father is on my neck. Sorry for the many comments :s. Hi, ive built this amp but it seems that the bass response is too high. . Please, am working presently on this amplifier.. what a fentastic circuit, this 150 W audio ampli circuit of darlington pair transistors Tip well, i used a heat sink for TIP142, but wasn’t that big and i also placed a fun beside it which reduced the temperature to some extent, but the sound still distorts and diminishes eventually. but i cant understand this problem.bcoz of my poor knowledge. FOR STABLE OUTPUT We have a complete tutorial ( images as well as videos ) of this circuit’s building procedure… hi mr seetharman i was able to get 8 ohms 800 watts speaker,can this work for me. BTW, I am from Bangalore, anyone know what is the best place to buy these components? This business was started as a result of Rick's personal passion for vintage audio gear and a desire to help others with their collectible gear. Hi Daniel may be your TIP147 is dead short between collector and emitter. I will get a bigger heat sink to try and see the results. • Repetitive peak reverse voltage: I have a (+45, 0, -45) unregulated power-supply, should I test with it or solve the issue at 12 V first ? I have made this circuit for more than 1000 times i Hope for your reply sir. 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. It requires a dual +25/-25 volts supply. so i m happily says “thank you admin”. please find the link below, will it works and give 400w output.which is the better circuit 150w circuit in this page or the circuit in the link bellow.please help me to choose one. BYE………. Or send it to my Email address (princestechnology@gmail.com). 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. IS THIS POSSIBLE ??. It’s actually a great and useful piece of It will adjust the gain of amplifier so noise will be removed. Seetharaman, i cant find 6A5 diode. the amphere decrease or not? Its working great what a sound providing this amp. 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. . with + – 30 volts DC you will get 85 watts into 4 ohms load and 42 watts into 8 ohms load. Adding a diode n a 22/27 ohms in series with d two present diodes but am still having d crossover distortion.so I want to set the standing current but I don’t knw how to do dat (Whr to place the red and the probes)to carry out d reading and setting of the q-current. Please help me sir. both channels inputs are comes out through both left and right channels. thank u sir I did d same as u said and its working fine thanks a lot, Pl print full diagram with sp arts name in colour &its veroo bird number. I dont know what happent. If any problen Can i use +/-37 volt 5amp with 4ohm subwofr? please help sir. Hello, Can i use 1N4007 Doides to replace 6A5 doides in the power supply circuit? What i understand is: – One 680pf for tip142 with one leg on the base & other leg on collector . Finally i did it. Please i need other Doides for replacements, my brother rex you can use 6A10 diodes it gives a very stable dc it is 10000 volts and 6A, We have built this circuit about more than 1000 times this works well and perfect.. im assuming this will work fine but is there anything i should know? Thanks. Please give me a solution sir… And i have one more qustion can i use 0.2 ohm instead of 0.33 ohm? 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. (for best effect i use the power capacitors value is 10000/50v*2 for dual) i use unregulated +44/-44 and GND power supply for all these amps from single transformer.is this problem? i also have to open my mp3 player to the maximum volume before the sound becomes stable, which is even a bad sound. 01. I’m hoping your replay, have a good day. Sir i again try it. engr.omer9@gmail.com, I will provide you its PCB diagram 100% free of cost. Please help me siq. If any one of 33 ohms smokes switch off immediately and look for the mistakes and correct it. Noise is removed by replacing 220ohms resistor with 550 ohms resistor. . Thank you. It would probably matter little if this was a lower-power amplifier (<40W), but for a design that aspires to 150W, a transistor in place of D1 and D2 whose base is connected to a pot that can fine tune the bias voltage is essential, IMHO (the www is filled w circuits for this). this may short with the other end of the output of each channels. Sir instead of publishing only the circuit diagram,kindly provide the stereo amplifier PCB, the power supply board along with the transformer specifications say the data for winding with gauge of the insulated copper wire for primary number of turns as well as for secondary reminding of ampere, the core size and lamination’s brand etc. MAX. the transformer’s secondary voltage is 30-0-30 5amps, What can i do to lower the bass response, maybe decrease the gain? Hey guys have you already tried the PCB design of this schematic by jspayne? sir how many voltge we can apply on its input . Please clarify. 1.SUPPLY SHOULD BE +/-40-0-40 TO +/-45-0-45 VOLTS WEATHER REGULATED OR UNREGULATED. I want to make 5.1channel150 watt amplifier. If it is possible i m very lucky. n I have d2390 transistor is it dsame with 2sd2390? I use 15-0-15V and 6ampere transformer. I meant: Can I replace the TIP142 with a TIP141 ? I have +/-40v 5amp supply. 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 . ;then try out this. we are here to solve your problems… thanks , have a good day I have +35v/-35v 5amp duel power supply. I CAN USE 2N3773 =IN PLACE OF 2N6254, But the other one i did i sold out. place mica sheet between tip142&tip147&tip41 and heatsink.check out and confirm there is no link between heatsink and those transistors. You can reduce the gain by increasing the value of 220 ohms of R2 to 470 ohms or 1K. Please help me sir. EEVblog #1059 - Quick 861DW Hot Air Waveform Measurement EEVblog #1058 - … Yeah, i also wonder that. i use 12 v auto head lite bulb(upper-dipper both filaments) instead of 0.33ohms/7w resistances. Can i check it using Multisim? IF continuous forward current see Fig.2; note 1 − 200 mA Think I can handle a build completely from scratch. for stereo can i double this circuit and use a 5A transformer is it enough. this darlington are rocks (better use for left right). Any schematics for something like this? actually this amp delivers actual wattage of 150watts on 4ohms speakers, and 100 watts on 8 ohms. So iam waiting for ur replay…. Ron Thomas Use cold check with a multimeter to find out damaged components. Device mounted on an FR4 printed circuit-board; lead length 10 mm. i m also want to build 5.1 using this circuit. • Hermetically sealed leaded glass Hi sir, sir can i place one capacitor loop with one resistor from the positive pin of speaker to ground for my mingle problem? i use this circut as a subwoofr amp. THE output of stk 4141 for subwoofer is better this one. yes surely you can use the resistor of 0.5E it will give more stability than 0.33E. 2. 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. If any one is interested then feel free to contact me. I will send soon. DVD-Audio (commonly abbreviated as DVD-A) is a digital format for delivering high-fidelity audio content on a DVD.DVD-Audio uses most of the storage on the disc for high-quality audio and is not intended to be a video delivery format. trhanks. But there is a problem with this left right channels. i build this darlington for left right. Sir, i have one problem on my ckt. AND also 2nd channell input also amplifying through both channels. Sir I am very much interested in assembling of stereo sound systems with high output in RMS ratio. technology, and encapsulated in hermetically sealed leaded glass SOD27 Thanks im getting rocked, Circuit works great! Kindly use series regulators and reduce the voltage to around plus minus 40 and use. Sir i did this amp for stereo application 1 month ago. BUT. Noise is removed by replacing 220ohms resistor with 550 ohms resistor. circuit diagram shows 8 ohm driver of 150 watt and description says 4 ohm. 2 X 32 Watts Stereo Amplifier Circuit – This circuit is built using TDA2050 which is a 32 Watts Class AB Audio amplifier IC (monolithic) . Use 3nos 10K 1/2 watts in Parallel. i think than your amp go on without any problem ,i have made these changes in my circuit,and no problem. handbook, halfpage you will get +42 0 -42 volts DC. VRRM repetitive peak reverse voltage − 75 V I also check the diodes it is working perfect. YOU CAN USE 30.0.30/5 AMP SUPPLY FOR BOTH THE CHANNELS, IT WILL PROVDE YOU THE SAME QUALITY SOUND ,BUT THE WATTAGE WILL BE HALF NEARLY 80+80 WATTS.