The FT 920, FT 897D and FT 1000MP has the same audio amplifier TDA2003, where white
noise was rather disturbing. Therefore I added a recommended feedback
according TDA 2003 data sheet description. According to the
recommended formula, the RC circuitry cuts tones higher than 3 kHz. The additional serial RC circuit can be directly soldered
between pins 2 and 4 of theTDA2003. See picture 1
For SSB ( 2,7kHz) Rx= 39Ohm Cx= 270nF
The FT 920, FT 897D and FT 1000MP has the same audio amplifier TDA2003, where white
noise was rather disturbing. Therefore I added a recommended feedback
according TDA 2003 data sheet description. According to the
recommended formula, the RC circuitry cuts tones higher than 3 kHz. The additional serial RC circuit can be directly soldered
between pins 2 and 4 of theTDA2003. See picture 1
For SSB ( 2,7kHz) Rx= 39Ohm Cx= 270nF
For SSB ( 2,7kHz) Rx= 39Ohm Cx= 270nF
