This is my second mail about this. I dicovered that is jumps 5 KHz on the other bands, so i checked the Vout of the 12-bit-DAC ( U5 ). It works o.k. on 40 meters, but not on the rest of the bands. My question is : why is that only on 40 meters that the Vout of U5 is working good, but it seems to block on the other frequenties. 73 de PA3BPV