[StephanieS]

TVnoob,

Welcome! We've all been there with our first set up!

In looking at your plot, a couple things jump out at me. First, the Bellingham signals KBCB and KVOS at magnetic 340 and 73.6 miles. How important are those to you? I ask because those two signals will likely require a dedicated long range UHF antenna on your roof like the Antennas Direct 91xg or a comparable beam or bowtie design to receive reliably. The bad news for KBCB and KVOS, a preamp to help overcome signal losses in your setup is likely not an option for you. With 76 db signals in the air, it is a recipe for overload.

Secondly, your reception situation is very favorable. If the attic installation is your choice. KVOS and KBCB will be gone. The only chance to receive those signals will be outdoors and with as clear as possible pathway to magnetic 340. In the attic scenario, I would say your weakest signal to expect reliable reception of would be KUSE-LD @ 28.6 db. I am going to assume you are in a wooded area, as such, people who might be able to receive weaker signals in the attic, do so with less obstruction by the trees. This is really going to hamper your weaker signals.

Attic installations are not preferred by anyone here. Especially in wooded areas as you are battering the signals you are trying to receive. First, they have to get through the evergreens to the antenna and second, they have to penetrate through your roof. Going through the roof can create unreliable signals and drop outs even with excellent signal strengths. TV signals don't do well passing through solid materials.

I would encourage you to mount on the roof. KVOS and KBCB are signals that outdoors is the only chance at successful reception.

How many TVs do you intend to feed from the antenna? How long is your coax run? Are you fighting 150' tall evergreens in every direction? Before I can make an suggestion I need a bit more info.

SS