Here is a list of DEA freqs in the boston south area. ch-1 418.625 rptr. about half dvp scrambling ch-1 416.050 input to 418.625 ch-2 418.900 rptr. central ma. ch-2 416.325 input to 418.900 ch-3 418.750 simplex car to car and aircraft surv. ch-6 418.950 rptr. cape cod area ch-6 416.375 input to 418.950 I have found that in the last few years the DEA has gone to mostly scrambled comms.At one time they were all in the clear and it made for some pretty interesting listening. Try using CTCSS tone of 156.7 Hz to eliminate the DVP. Sometimes they do mess up and forget to turn on the bubble machine. Lots of interesting COMMS when they have a joint operation.