In my comparisons of the RCA DTA800 with Zenith DTT900/901 before today, I've focused on weak channels in the UHF range. In my area (LA) there is only one real VHF channel (8) and I haven't paid much attention to it, since I don't watch it, and I've never gotten the analog version. Today I noticed that the Zenith boxes pick up 4 subchannels (8.1-8.4), but the RCA only picks up two subchannels (8.1,8.2). In looking at this curiousity more closely I found that the RCA box has a much lower signal strength on this channel than the Zenith boxes. Up to now the RCA box has been equal to or better than the Zeniths in holding a weak (UHF) signal. I find it very strange that the RCA box only picks up 2 of the 4 subchannels. On the Zenith boxes, the signal strength is solid and the same on all the subchannels. On the RCA box the signal strength is marginal and highly variable, sometimes even breaking up, and it refuses to find more than 2 subchannels.
I seem to remember an early post describing trouble picking up lower VHF channels on the RCA box. Anyone else notice problems tuning to channels in the real VHF range? This is of concern because post-transition, many of the channels in my area are moving from the current UHF range back to the VHF range now occupied by their analog versions.
Off topic: In looking at TVFool for my area I notice there are two digital channels listed for the same real channel -- digital channels 54.1 and 46.1 are listed as real channel 47, and the direction and distance are the same for both. I didn't know this was possible. I can tune to both digital channels fine.