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dj_radu69

bruiaj cooler

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buna ziu am si eu o problema in legatura cu o sursa de calc , pe ea am o statie 27 mhz , si aud coolerul in difuzorul statiei ce sa fac ? multumesc

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Problema ta nu este cooler-ul de pe sursa, ci sursa in sine. Nu m-i se pare o.k. sa alimentezi aparatura radio de la o sursa in comutatie, nu intru in detalii, incearca sa folosesti o sursa liniara de tensiune, sunt o gramada de scheme pe net.

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toti radioamatorii folosesc surse in comutatie , si daca opresc coolerul numai face.... !!

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daca chiar este ventilatorul problema incearca cu ceva filtre LC sau poate o altfel de alimentare pt. el :rolleyes:

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Da intradevar radioamatorii folosesc ptr alimentarea finalilor de emisie surse in comutatie insa la receptie se foloseste sursa liniara :yawinkle: eu zic sa consulti putin cartea Montaje practice RADIO sa vezi cum arata o sursa modificata cand baga in emisie intra comutatia si cand sta pe receptie sta liniara activa

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am mutat coolerul pe alta ramura de alimentare si numai facea dar aveam brum in emisie , am rezolvat pana la urma am gasit alta sursa i'am schiimbat 2-3 conzi si e bine acuma :)

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si o dioda pusa in "contrasens" (adica invers de a face scurt) te poate ajuta+ pe fiecare fir de la ventilator cate o diodaam avut si eu asemenea probleme la statie...coolerul imi tiua in difuzor :rolleyes:

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