Just over a month ago, I started the thread
Digital TV Transition Not as Easy as Advertised.
In it I said:
I live in Alexandria, Virginia. I have TV sets equipped with rabbit ears. Those antennas are modified from existing antennas, and I installed those antennas in the sets myself. In the spring, I like to watch over-the-air broadcasts of college lacrosse from Baltimore's WMAR channel 2. Next spring, I won't be able to see those broadcasts, as the distance between me and Baltimore is beyond the limits of digital broadcasting. A lot of people are in for a big surprise.
After finding my lost coupons last week, I remembered the advice I received in the replies to my message and used it to engage in a crash course in figuring out which converter box to buy. I ended up buying two Zenith DTT901 CECBs from Circuit City. It turns out my fears were unfounded. I can too get channel 2 from Baltimore. The improvement in reception is nothing short of remarkable.
The whole story is here:
Over-the-Air Digital Television Broadcasts of Lacrosse.
Thanks to everyone who wrote with helpful advice.