Aplicaţia circuitelor integrate în audiofrecvenţă este mult apreciată de constructori. Este foarte comod să construieşti amplificatoare de acest fel intrucit au gabarit mic, randament mare, nu necesită multe piese,…
Adaptor pentru gama de US la un radioreceptor se poate realiza in doua moduri — prin modificarea schemei radioreceptorului cu adaugarea unei noi pozitii pe comutatorul de game; — realizarea…
Dupa ce au fost inlaturate toate defectele din aparat, etalonarea scarii radioreceptorului nu mai corespunde (mai ales daca au fost miscate miezurile circuitelor OL si FI intentionat sau din greseala).…
Daca localizarea defectelor la nivelul etajului sau circuitului respectiv prin metodele indicate pina aici (cap de proba, semnalele de test, masurari) nu a dat rezultate, atunci se va consulta, la…
In general, exista numeroase montaje pentru incercarea si masurarea tranzistoarelor. Citeva scheme simple, accesibile oricarui radioamator, au fost prezentate cu ocazia descrierii metodelor de verificare a dispozitivelor semiconductoare. Vom descrie…
Depanarea radioreceptoarelor reclama un timp mai indelungat in depistarea etajului sau piesei defecte decit inlocuirea acesteia. Au devenit foarte utile, in special, la repararea radioreceptoarelor tranzistorizate, asa-numitele generatoare de semnal…
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