HD radio and old antennas

The HD switching is looking for about 55dBf to switch from analog to HD. Also, the signal must be in the neighboorhood of +50 S/N to allow switching. Some antennas do contribute noise, especially the amplified ones, which is a no-no. My Terk FM -Pro does not work well on HD. An antenna that contributes little noise is a coxial sleeve. In addition, perfect impedance match is also important because it causes self-inflicted multipath. Don Scott

Does the FM Pro work well if the amplifier is off?

This does bring up the big problem that some people were predicting with HD FM - the effective reception range of the digital broadcast will be quite short.

This is the most promising FM antenna I have seen,
http://www.seengineer.com/

Note that it mounts on the eaves of your home like DBS, which is much more convenient than the Yagi roof mounted antennas. They emphasize precise impedance matching and high S/N ratio.

Yes, it will be nice when HD Radio moves from cars to living rooms.