I'm glad you posted this, I have a question about BlackHawk county too. I can scan them fine, but do they have a VHF link frequency? I can't listen to them down here in Tama County even with my outside Discone, but it seems like most agencies that are on RACOM also have a VHF link channel, but I don't see one listed on the database for BlackHawk.
Don't mean to hijack your thread but I figured it was an appropriate place.
Make sure you're set to EDACS. Make sure that you do NOT put the first channel on channel zero in your bank, skip that and follow the numbered frequecies on the database to the T and you should be good.