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Scheme de amplificatoare audio

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cateva scheme noi de amplificatoare audio:

 

- celebru LECO AMP:

post-237-073561600 1327833482_thumb.jpg post-237-031721300 1327833508_thumb.jpg post-237-072761000 1327833526_thumb.png

 

Comentarii @DJLeco:

Schema care este atasata prima, este o schema din care am dezvoltat mai incolo, modulele mele, valorile difera, atit la unele rezistente cit si la tranzistori, cit si schema de principiu.

O puteti incerca asa cum este, suna foarte bine la +/- 60-65Vcc.

Cablajul al 2-lea este PRAF, greseli elementare

 

- un amplificator cu mosfet misto:

post-237-094003700 1327833542_thumb.jpg

 

AMBELE CABLAJE FUNTIONEAZA OK , TESTATE DE MINE CU TENSIUNE DE PNA LA +/- 90V(MAI MULT NU AM AVUT) , CEL DE-AL 2-LEA ARE O SINGURA GRESEALA PE CARE AM CORECTAT-O ....

http://img507.images...aladecablaj.jpg

https://fbcdn-sphotos-b-a.akamaihd.net/hphotos-ak-ash4/475223_618510621511101_2033052621_o.jpg

http://imageshack.us/f/822/dsc01779bd.jpg/

Edited by dcerebel

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Prima arhiva cu "LECO AMP" (schema leco amp ) nu functioneaza ??? ma refer la cea pe cablaj deptrunghiular ??? Daca da, atunci inseamna ca valorile din schema ta sunt modificate , sau nu sunt cele din schema originala , zic asta ca eu am aceiasi schema dar difera mult valorile la piese ....

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Schema din acel atasament l-am folosit si eu in ampliful meu ,cu cateva modificari. Cam asta e schema (vezi atasament) folosita , care a functionat din prima si inca mai functioneaza.

 

Tensiunea folosita a fost +-75 Vcc si inca mai mergea...

Schema.pdf

Edited by jack_roby2008

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Amplificatorul de mai jos se poate alimenta cu tensiuni cuprinse intre +/-40V si +/-60V (este o schema gasita mai demult pe net si nu am citit sa fi fost testata - merita totusi mentionata in acest topic):

300W amplifier schematics.jpg

 

Si lista de piese:

 

Rezistoare:

R1_____560?

R2_____100?

R3_____2K2?

R4_____560?

R5_____1?

R6_____27K?

R7_____10K?

R8_____100?

R9_____100?

R10____100?

R11____12K?

R12____100?

R13____100?

R14____100?

R15____27K?

R16____2K2?

R17____560?

R18____100?

R19____10K?

R20____330?

R21____47? 2W

R22____56?

R23____2K2?

R24____22?

R25____56?

R26____180?

R27____500-1K? Trim

R28____560?

R29____56?

R30____56?

R31____22? 1W

R32____5?6 2W

R33____10?

R34____180?

R35____100?

R36____22? 2W

R37____180?

R38____56?

R39____47? 2W

R40____5?6 2W

R41____10?

R42____10?

R43____10?

R45____10?

R46____0.22? 5W

R47____0.22? 5W

R48____0.22? 5W

R49____0.22? 5W

R50____10? 5W

 

Capacitoare:

C1_____1?F

C2_____1.5nF

C3_____0.1?F 250-275V

C4_____0.1?F 250-275VC5_____100nF

C6_____100?F 50V

C7_____39pF

C8_____330pF

C9_____330pF

C10____330pF

C11____47nF 250-275V

C12____220nF 250-275V

 

Tranzistoare:

T1_____MJE340

T2_____2N5551 / C2240

T3_____2N5551 / C2240

T4_____2N5551 / C2240

T5_____2N5551 / C2240

T6_____2N5401 / BF423

T7_____2N5401 / BF423

T8_____2N5401 / BF423

T9_____2N5401 / BF423

T10____MJE350

T11____B1186

T12____TIP127

T13____D1763

T14____D1763

T15____B1186

T16____C5198

T17____A1941

T18____2SC2922 / MJ15024G

T19____2SC2922 / MJ15024G

T20____2SA1216 / MJ15025G

T21____2SA1216 / MJ15025G

 

Numai bine

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Dintr-o revista veche Tehnium am gasit si eu o schema interesanta de amplificator ce poate debita o putere de 75w pe o sarcina de 8 ohmi si 150w pe o sarcina de 4ohmi si prin dublarea tranzistorilor finali.Paginile sunt atasate intregi,deci dati cu zoom.Apropo in cazul in care schema deja este postata rog moderatorii sa stearga postul.

post-24530-0-02140700-1381661951_thumb.jpg

post-24530-0-22955000-1381662561_thumb.jpg

Edited by marius1289

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Revin cu doua scheme de amplificatoare:25W si 50W.

post-24530-0-86841200-1381740535_thumb.jpg

post-24530-0-55057800-1381740544_thumb.jpg

post-24530-0-16686400-1381740554_thumb.jpg

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