[mikethedruid]

Looking at the schematic for the model 17 it appears that the two bands are actually:
520 - 1500 K.C. and 1500 - 4000 K.C. The modern Broadcast band extends from 550 - 1600 K.C. So, the modern AM broadcast band is split between the two bands on your radio. This means that you should hear regular broadcast band stations between 1500 and 1600 K.C. on the lower end of the higher frequency band. What was above that in the old days was the lower frequency Police band, 1600 - 1700 K.C. and a higher one from 2200 - 2300 K.C. This band also covered the 80 meter ham band and some lower frequency short wave stations. You are at a point where you need a signal generator to really hunt down the situation with your radio, and do a proper alignment.