edy_wheazel Posted February 5, 2015 Share Posted February 5, 2015 Salutari. Spuneti-mi unde gasesc de cumparat in Romania tranzistori cu factor mare de amplificare (mai mare sau egal cu 1500). Un exemplu' ar fi MPSA18 (care bineanteles nu se mai fabrica/gaseste) care la o Vce de 5V si Ic de 10mA are Hfe de pana la 1500. Orice sa fiu daca nu am cautat fiecare tranz. npn din catalogu' TME sa gasesc ceva asemanator. Multumesc anticipat. Link to comment Share on other sites More sharing options...
dani_rosu5 Posted February 5, 2015 Share Posted February 5, 2015 am eu,stai sa vad cati si iti pot spune cati pot ceda factorul de amplificare varianza de la 900 in sus,deci nu toti sunt in jurul valorii de 1500 din cate tin minte Link to comment Share on other sites More sharing options...
edy_wheazel Posted February 5, 2015 Author Share Posted February 5, 2015 Multumesc, trimite-mi te rog eventualul raspuns pe PM. Link to comment Share on other sites More sharing options...
zan Posted February 6, 2015 Share Posted February 6, 2015 MPSA18? Miroase a fuzz-uri, Pharaoh poate? Posibil sa am eu cateva, daca nu atunci sigur din aceeasi familie (pot sa confirm luni) - in caz ca ai drum in Oradea. Daca nu, vad ca au pe Das Musikding si o sa fac comanda in curand (sau mai bine zis deja am intarziat prea mult). Link to comment Share on other sites More sharing options...
edy_wheazel Posted February 6, 2015 Author Share Posted February 6, 2015 Multumesc Zan dar momentan am rezolvat. Da, ai ghicit, de un Pharaoh modificat ii vorba. Link to comment Share on other sites More sharing options...
AnalogSound Posted February 6, 2015 Share Posted February 6, 2015 Dar... ca sa iti faci niste dralingtoni din 2xBC550 ... ii vine rau? 4 Link to comment Share on other sites More sharing options...
edy_wheazel Posted February 6, 2015 Author Share Posted February 6, 2015 Nu l-am intrebat. Sincer ni-e lene sa-mi modific cablaju'/breadboard-u'/zodiacu'. Link to comment Share on other sites More sharing options...
AnalogSound Posted February 8, 2015 Share Posted February 8, 2015 Tre sa indoi doar cativa craci de la cei doi tranzistori... dar noh Link to comment Share on other sites More sharing options...
edy_wheazel Posted February 8, 2015 Author Share Posted February 8, 2015 (edited) Pe breadboard partea de intrare nu suferea modificari, asa ca am facut-o compacta (am bagat in cate o gaura si 2/3 pini), plus ca ar trebui sa modific si cablajul. Sincer, ma gandeam ca BC549C are factor de amplificare suficient de mare, ulterior am vazut ca dadea cu virgula. Am rezolvat elegant, imi trimite cineva tranz. cerut, macar data viitoare is mai atent la aspectele astea. Jucaria ii cea din video-u' de mai jos. Am modificat circuitu' de ton, i-am pus un corector Baxandall in loc de circuitu' original (pot-ul de medii avea efect doar daca cel de ton era la minim). Se aude si kinderu' ala mic. Ala mare a fost motivu' pt. care a trebuit sa sterg filmarea anterioara (in timpu' filmarii a venit "tati! tati! tati! tati! tati!", "CE-I??", "... pot sa ma joc pe tableta?", "AAARGGHHHHH!!". Edited February 8, 2015 by edy_wheazel 1 Link to comment Share on other sites More sharing options...
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