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valioval

intek h-520 plus

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Va salut!Am o statie emisie-receptie portabila intek H520 plus care nu stiu din ce cauze nu mai emite decat max. 50 metri, dupa cateva masuratori prin piese am gasit prfinalu N channel MOS 2SK 3078 defect pe grila-sursa(aproape scurt 90 ohmi)Nu gasesc de unde sa cumpar acest tip de tr. mos de aceia va rog daca puteti sa -mi dati o idee ,pot pune alt tip de tranzistor de ex. prefinalul C2314 npn dar nu este mos.Finalul statiei este tot un MOS 2sk3476 care este bun pot sa-l schimb cu tranz. final C2078?

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poti sa pui,dar trebuie sa tii cont de polarizare baza,adaptarea capacitiva cu colectorul care la bipolar este total difetita fata de mosfet..acolo trebuie sa obtii o putere de 2w ca sa poti deschide finalul..nu stiu daca ai de unde deschide 2sc2078 sa scoata 2 w acolo...eu zic sa cauti pe ebay si sa pui ce trebuie acolo,dar poti cauta si in telefoanele mai vechi poata ai noroc...de asemenea pri statiile portabile PMR ,observ ca merge pana la 900Mhz..

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