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Sharky

Scheme amplificatoare

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Un amplificator publicat in Radio 2/1990, cu finali darlington ; amplificatorul operational lucreaza in clasa A.

R_1990_02_1.jpg

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Un amplificator pentru instrumente muzicale, cu preamplificator cu corector de ton .

cube40.jpg

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Pioneer Exclusive M3, amplificator de 150w , inspirat  de  amplificatorul realizat de M.Otala si J.Lohstroh.

Exclusive M3.jpg

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Un amplificator realizat la Riga , la sfarsitul anilor "80, cu performante deosebite, inspirat de Sansui, cu unele diferente (diferential cascod cu bipolari la intrare, vas cascod,etc.).

um7011sch.gif

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Un amplificator cu tranzistori cu germaniu,din "Stereofonia pentru radioamatori",la solicitarea unui user; are avantajul separarii finalului  si cateva erori (desen,valori) care pot fi remediate usor,daca prezinta interes se pot posta si paginile cu descrierea schemei.

DSCN0165.JPG

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SpeakerWireCompensation.pdf

Din cutia cu "maimutze" , cum considera unii domni, un adaptor pentru amplificatoare audio care compenseaza influenta cablurilor, tradus in engleza , pentru un Technics, dar poate fi folosit si la alte amplificatoare; k157ud2 e un operational dual ,cu bipolari.

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Un amplificator simetric interesat , Heathkit AA-1180, de prin anii"80; atentie, tensiunea de alimentare are valori ridicate, pericol de electrocutare.

heathkit aa-1180.jpg

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Posted (edited)
La 17.03.2020 la 20:43, ex.escu a spus:

Un amplificator simetric interesat , Heathkit AA-1180, de prin anii"80; atentie, tensiunea de alimentare are valori ridicate, pericol de electrocutare.

heathkit aa-1180.jpg

 

Clasa G.

Tranzistorii Q115, Q119, Q123, Q125 respectiv Q116, Q120, Q124 si Q126 realizeaza alimentarea finalilor cu tensiune variabila proportionala cu semnalul.

Edited by sesebe

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