vineri, 17 mai 2013

HOMEMADE DIRECT CONVERSION ON 80M





un trx  simplu dsb in 3.5mhz .la receptie foloseste TBA120 care mia placut mai mult ca TAA661.urmeaza un filtru audio , un amplificator  cu lm741  si un final cu TDA2003 la emisie are un formator dsb cuNE612 urmat de trei etaje amplificatoare ,ultimul fiind cu IRF530.puterea de emisie este de 5w , se putea si mai mult, dar am preferat asa ca sa nu am probleme de tvi cu vecini

a simple dsb in trx 3.5 mhz. reception at TBA120 which uses more pleasant as TAA661. follow a audio filter, an amplifier with a final lm741 TDA2003 emission has a former at dsb cuNE612 followed by three floors, the last being amplifiers with IRF530. transmit power is 5w, could have been more, but I preferred so she doesn't have problems of tvi with neighbors


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