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Scheme de amplificatoare audio

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Mai jos redau un proiect interesant de amplificator audio de 50Wrms in 8Ohmi (merita realizat):

SC480_50Wrms_8_Ohmi.rar

 

LATER EDIT: Schema amplificatorului atasata in arhiva cu ajutorul lui piglett.

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Si acest amplificator l-am vazut recomandat in mai multe locuri.

http://sound.westhost.com/project3a.htm

La prefinali merg si BD139/BD140 iar la finali BD249/BD250.

Cine l-a facut poate ne da niste detalii despre constructie si reglare.

Comentariu asupra proiectului adus de piglett:

da da da da, P3A-ul meu. cred ca e cea mai mare valva starnita de mine.

il recomand cu placere desi are multe neajunsuri.

am folosit BD249-250 pentru ca erau ieftini si mi-a placut forma carcasei.

 

revenind cu picioarele pe pamant: recomand in loc de BD139-140 tranzistorii din schema originala MJE15034-15035, iar ca finali 2SC328X-2SA130X; MJ15015-15016; MJ15003-15004; MJ21193-21194.

semireglabilul din superdioda sa fie multitura, un radiator supra dimensionat. cine doreste cablaje sa-mi spuna. am mai multe versiuni.

 

Comentariu asupra proiectului adus de betamax:

Tensiunea continua de pe iesire se poate anula daca te "joci" putin cu R6 (560 Ohmi).

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1. Amplificator audio de 20W, 8 Ohmi, +40VDC, THD=0,2% (cu 2N3055).

amplificator audio 20w.pdf - 0.19MB

 

2. Amplificator audio cu MOSFET 4W, aprox.38 Ohmi, 35VDC, THD=tipic aprox 5% la Pmax:

amplificator audio mosfet 4w 38 ohmi.pdf - 0.19MB

 

3. Amplificator audio Aleph5: +/-34VDC, 100W, 4 Ohmi, THD=0,01%.

aleph5 30w.pdf - 0.43MB

 

4. Amplificator audio cu IGBT, 160W, 4 Ohmi, +/-43VDC, THD=cca. 0,05% la Pmax.

igbt_amplifer_104.pdf - 0.60MB

 

5. Amplificator audio cu MOSFET 100W, 8 Ohmi, +/-55VDC, THD=aprox. 0,02% la Pmax.

amplificator audio mos fet 150w.pdf - 0.32MB

 

6. Amplificator audio MOSFET 25 W, 8 Ohmi, +/-33VDC, THD=0,01%.

http://www.elecfree.com/25W_Mosfet_audio_amplifier.php

 

7. Amplificator audio MOSFET 1000W, 4 Ohmi, +/-100VDC, THD=0,1% la Pmax (cunoscut si sub denumirea de AV1000).

1000w power amplifier.pdf - 0.02MB

 

8. Amplificator audio cu tranzistoare bipolare (200W, 8 Ohmi, +/- 70VDC, THD=0,08%):

thumb.gif

 

9. Amplificator audio cu tranzistoare MOS-FET 800W 8 Ohmi, +/-150VDC, THD=0,1%.

thumb.gif

 

10. Amplificator audio cu tranzistoare MOS-FET 31kW 4 Ohmi (no comment):

thumb.gif

 

11. Amplificator audio CS200v1, 200W, 4 Ohmi, +/-50VDC, THD=0,032%:

CS200v1_Power_Audio_Amplifier.jpg

 

12. Amplificator audio CS200v2, 200W, 4 Ohmi, +/-50VDC, THD=0,032%:

CS200v2_Power_Audio_Amplifier.jpg

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1. Schema amplificator audio +/-55VDC, aprox. 150W in 4 Ohmi, THD=0,02% cu MJ15024:

post-4-1191673838_thumb.jpg

2. Mixer + Amplificator audio simplu:

post-4-1191673875_thumb.jpg

3. Amplificator audio Electromures 2x75W.

post-4-1191673923_thumb.png

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Un amplificator simplu, performant, pentru casti:

post-4-1192810300_thumb.png

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Cateva pagini web utile cu si despre amplificatoare audio:

 

1. Amplificator audio cu MOSFET de 200W:

http://www.siliconch...intArticle.html

 

2. Un amplificator Hi-Fi performant de 100W cu MOSFET:

http://www.littlefis...s.com/poweramp/

 

3. Un amplificator simplu Hi-Fi pentru subwoofer (merita realizat):

http://www.redcircuits.com/Page66.htm

 

4. Un amplificator cu HEXFET:

http://users.otenet...._hexfet_eng.htm

 

5. Un amplificator audio inditulat "DRACULA" (tot cu MOSFET-uri, interesant, o solutie daca doriti sa evitati sa construiti un amplificator cu TDA7294):

http://www.kafka.ele...ony/dracula.php

 

6. Un alt amplificator cu MOSFET:

http://www.angelfire...jramp/amp7.html

 

7. "Motorola Hi-Fi power amplifier":

http://electronics-lab.com/projects/audio/007/index.html

 

Enjoy.

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Cel mai construit - amplificatorul AV400:
400W_Anthony_Holton_amplifier.rar

si AV400v2 aici: http://www.tehnium-azi.ro/topic/5481-av400v2-amplificator-audio-hi-fi-de-400w-4-ohm/


AV800:
AV800.rar

Amplificator audio 200W cu MOS-FET (o alternativa la AV400 daca nu doriti o putere asa mare):
200W_n_FET_Amplifier.rar

IPA300 - denumirea originala a amplificatorului: Quasi Nmos350 - vezi pagina web: http://www.adam.com.au/cgpap/QuasiWeb/index.htm
IPA300.pdf

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1. Un amplificator 60W de bass special pentru un subwoofer:

http://www.diy-electronic-projects.com/p28...-Bass-Amplifier

 

2. Amplificator audio de 5000W:

http://www.diy-electronic-projects.com/p39...de-power-supply

 

3. Un altfel de amplificator audio, de numai 50W:

http://www.diy-electronic-projects.com/p3-50-Watt-Amplifier

 

4. Un amplificator simplu de numai 18W:

http://www.diy-electronic-projects.com/p12...Audio-Amplifier

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Nu stiu daca s-a mai postat acest amplificator dar vreu sa va spun ca reprezinta o alegere buna daca nu aveti chef sa realizati un AV400, AV800, IPA300 etc De fapt, tocmai va prezint cel mai bun si simplu amplificator audio Hi-Fi pe MOSFET-uri (cateva caracteristici: un 60W in 8Ohmi, THD=0,01%, alimentare la +/-40Vcc - numai bun pentru acasa :b1: ).

Cum spun englezi?

Enjoy. :l4:

 

AMPLIFICATOR_AUDIO_cu_MOSFET_60W.pdf

 

P.S. :134:

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