I got another 6 feet, so it's about 20 feet in the air, and that was
it. I have a tin roof, and that might have been blocking when the
antenna was lower.

I also routed the coax around the eve of the roof to the office,
instead of through the garage to the basement up through the floor. It
might have had some interference in the basement.

I have one single run of coax, 70 feet, and I used compression bnc
fittings on both ends. I got the cable right off the spool at a local
home improvement store.

Thanks!