Hi kennylive: Yes, before I posted this thread here, I emailed Denny's Antenna with a question about the RCA751, or rather his version of it, but he never replied back.
So I posted my question(s) here on TV Fool and received numerous replies and analysis, especially from rabbit73 who is very learned in this field of TV antenna electronics. I would encourage you to read as many of his threads as possible because you will learn a lot.
Anyway, stay tuned as they say because you usually clear reception for your issues here. Best,