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burn.out

Amplificator Hibrid Lampa MOS FET

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Acum 5 ore, remus68 a spus:

Daca ai un termometru, cand pui in functiune montajul, te rog sa masori temperatura grupului R8, R9, R10.

Desigur se pot masura multi parametri si temperatura in grupul de rezistente, dar daca fiecare rezistenta

 de 1W disipa 0,56W, nu va fi o temperatura care sa influenteze durata de viata a montajului sau o supraincalzire locala.

@gsabac

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In functie de tipul si varianta constructiva, rezistentele pot avea temperaturi diferite in functionare, pentru aceeasi putere disipata.

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cateva poze cu micul proiect transformatoorul are infasurarea de 26v( 26-0-26) ca 4 fire torsadate de 0.8mm , infasurarea de 140v ca are sarma de 0.3mm , infasurarea de 6,3v 2 fire torsadate de 0.6mm , datorita infasurari de 140v voi folosi un dublor de tensiune si un stabilizator cu un mosfet am sa postez schema de bublor de tensiune 1032759159_WhatsAppImage2019-05-25at23_05_00.thumb.jpeg.445e42a7009197cce993443c5db02542.jpeg907754857_WhatsAppImage2019-05-25at23_04_59.thumb.jpeg.f7b134eac8de8077b5ba3902c9bc751f.jpeg465834296_WhatsAppImage2019-05-25at23_04.59(3).thumb.jpeg.e96864a9b65a4f77f6e750cd84dc24b4.jpeg1441536787_WhatsAppImage2019-05-25at23_04.59(2).thumb.jpeg.5fe7fdd5bb4f0889a4fd39f31af9f3eb.jpeg498233751_WhatsAppImage2019-05-25at23_05.00(1).thumb.jpeg.9ae2a5e925e0c1c766e2eb55deb5aac6.jpeg681665334_WhatsAppImage2019-05-25at23_05.00(2).thumb.jpeg.234dbca2263594b44eac438ac051b29a.jpeg465834296_WhatsAppImage2019-05-25at23_04.59(3).thumb.jpeg.e96864a9b65a4f77f6e750cd84dc24b4.jpeg401114131_WhatsAppImage2019-05-25at23_04.59(1).thumb.jpeg.b57aff119cb8cbce6740465ef35a2250.jpeg

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Inteleg ca ati bobinat manual transformatorul, frumoasa realizare, interesanta si ideea cu dublorul de tensiune

 si stabilizator reglabil se poate alege o tensiune optima de functionare, pentru calitate sonora maxima.

Daca doriti sa faceti probe mai rapide, fara dublor si stabilizator, puteti utiliza schema de mai jos, identica cu cea originala,

 dar cu valori modificate.

1160047475_@burn.out-AmplificatorhibridV02.thumb.png.62dc02e6b1ba684a3d4570a1e8b5daba.png

Tensiunea anodica de 190V se obtine direct din transformatorul prezentat in topic.

@gsabac

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Posted (edited)

buna seara am realizat o parte din cablaj , plantand cateva componente 881400272_WhatsAppImage2019-05-28at20_37_31.thumb.jpeg.b4f256706708e07cbc9902fbb106106d.jpeg

WhatsApp Image 2019-05-28 at 20.37.42.jpeg

Edited by burn.out

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Cum o să montezi tranzistorii pe radiator ? 

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@burn.out, ati realizat alimentatorul si ati facut probe cu amplificatorul?

Cati wati ati obtinut la iesire si ce calitate are auditia?

Dupa cum se remarca in ultima schema, in loc de 3 rezistente in anodul lampii 6J1P-T, montata ca trioda,

 sunt numai 2 rezistente. Aceasta modificare micsoreaza puterea disipata pe anod si mareste performantele.

@gsabac

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