Thanks for the replies.
I'm reluctant to try a temporary external installation of the 7697. The thing had to be assembled in-situ and I don't actually have much wiggle-room even with the truss construction of our attic. It would be a real pain to take it apart and get it out. Fortunately, the attic faces in the right direction. I do not believe we have any foil insulation. I'd probably rather buy a cheap antenna, or make one, for an outside experiment.
I don't have any other tuners to use for testing. I am, however, coming to believe the card may just be dead. The signal is pegged on SNR of 0, and there are no bad connections, etc, that I can find (and I'm not a newbie with electronics). I'm thinking that the next step might be to get another tuner card such as the Hauppage 1213 or Hauppage 1196.
Doug
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