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Comentari recente in sectiunea Descarcari
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ola_nicolas 158
Constructia mai contine si un volt-ampermetru digital, care este prezentat separat. El poate fi descarcat in format pdf de aici: http://www.thebackshed.com/forum/uploads/niall1/2010-06-15_225001_mk3980.pdf
Pentru cei care prefera instructiunile in limba romana, am realizat doua fisiere cu traducerea aproximativa a celor doua materiale.
Alimentator 0 – 30 V la 0,05 – 10 A.pdf
Volt-ampermetrul digital mk3980.pdf
Edited by ola_nicolas -
mducu 21
Salut,
atasez fisierul cu documentatia completa pentru a putea fi reconstruita.
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Comentarii Recente Galerie Photo
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Foloseste mai multe trafuri pentru fiecare banda de frecventa conectate prin filtrele necesare, am mai facut si eu de genul, asta este solutia profesionala, nu stiu daca are iesiri separate pentru difuzoarele pentru diferitele benzi de frecventa sau sunt insumate.
Curent folosesc amplificator audio full simetric cu tranzistoare cu banda de castig unitar 5 Mhz si SR 100v/microsecunda.
Specialistii in fiziologia auzului au aratat ca banda amplificatorului conteaza chiar si domeniul ultrasonic.
Pentru amplificatoarele cu reactie (feedback) banda conteaza pentru a avea castig in bucla si la frecvente mai mari, asta se traduce prin liniaritate la frecvante mai mari, si intremodulatie mai slaba.
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By ola_nicolas · Posted
Limitele benzii de frecventa sunt indicate intotdeauna pentru o abatere de -3 dB. Oricum, oameni care percep sub 20 Hz si/sau peste 20 kHz sunt foarte rari. Asadar limitele mult sub 20 Hz si/sau mult peste 20 kHz dau indicatii cat de liniara este amplificarea in banda utila, adica in intervalul 20 Hz... 20kHz.
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Frequency Response 7Hz to .... sunt mai importanti decat 220kHz!
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By ola_nicolas · Posted
... 23 kg ?!?!?!... Este cat un transformator de sudura, ceva mai "anemic".
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Ori s-a infiltrat pe ascuns un zero ori merge si pe unde lungi.....
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