Originally Posted by centricle
Do you get any VHF at all with the CM4221?
When I tested towards DC, 7 and 9 were both OK, with dropouts about every 10 minutes. I couldn't get a reliable signal at all for 11 and 13, which is why I added the AntennaCraft 5-7-13. Those are farther away, and even with the join of the VHF antenna, 11 is pretty spotty. To be honest, the CM4228 was only generally a tiny bit worse for me when pointed at Baltimore, but with the distance longer, it was too directional to get both tower clusters.
I think you'll do fine with a combo antenna like others have mentioned, as I'm at 100% signal quality on all my DC stations through the antenna poining that way, while I'm only down about 30% on those stations with the antenna pointed at Baltimore. You should
be the exact reverse, where an antenna that isn't too
directional should give you Baltimore perfectly, and some decent DC as well. You could also do the same thing as I do, and add a smaller antenna to point at DC. I use a pair of HDHomerun boxes with each one connected to a different antenna, but the software allows you to enable/disable channels on each tuner, then creates a combined list and automatically picks the right tuner/antenna when you want to view that channel.