bodo_b Posted May 9, 2009 Share Posted May 9, 2009 As dori sa construiesc un amplif. in clasa AB care sa se alimenteze la +/- 15V. Nu imi trebuie putere mare. 10W sunt suficienti. MultumescL.EAm gasit o schema dar nu stiu daca este in clasa AB. Sa imi spuna si mie cineva care se pricepe.Parts:P1_________________22K Log.Potentiometer (Dual-gang for stereo)P2________________100K Log.Potentiometer (Dual-gang for stereo)R1________________820R 1/4W ResistorR2,R4,R8____________4K7 1/4W ResistorsR3________________500R 1/2W Trimmer CermetR5_________________82K 1/4W ResistorR6,R7______________47K 1/4W ResistorsR9_________________10R 1/2W ResistorR10__________________R22 4W Resistor (wirewound)C1,C8_____________470nF 63V Polyester CapacitorC2,C5_____________100?F 25V Electrolytic CapacitorsC3,C4_____________470?F 25V Electrolytic CapacitorsC6_________________47pF 63V Ceramic or Polystyrene CapacitorC7_________________10nF 63V Polyester CapacitorC9________________100nF 63V Polyester CapacitorD1______________1N4148 75V 150mA DiodeIC1_____________NE5532 Low noise Dual Op-ampQ1_______________BC547B 45V 100mA NPN TransistorQ2_______________BC557B 45V 100mA PNP TransistorQ3_______________TIP42A 60V 6A PNP TransistorQ4_______________TIP41A 60V 6A NPN TransistorJ1__________________RCA audio input socketSchema aici : Link to comment Share on other sites More sharing options...
Sharky Posted May 9, 2009 Share Posted May 9, 2009 Peste R10 se pune o bobina de cativa uH.Schema e cam simplista si poate fi mult imbunatatita.Eu as alege altceva.Cred ca lm3886 merge alimentat si la asa tensiune joasa si e mai usor de implementat. Link to comment Share on other sites More sharing options...
zal Posted May 9, 2009 Share Posted May 9, 2009 Sau oricare din TDA2030, 2040, 2050... Link to comment Share on other sites More sharing options...
Rabulea Sergiu Posted May 9, 2009 Share Posted May 9, 2009 Sau schema asta:[attachment=0]AMPLIF CU TIP -VEL.pdf[/attachment]Folosesti doar partea de amplificator de putere. Link to comment Share on other sites More sharing options...
harry Posted May 11, 2009 Share Posted May 11, 2009 Tda 1557qviewtopic.php?f=59&t=29371 Link to comment Share on other sites More sharing options...
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