From post # 15
Originally Posted by Roger1818
Type of roof and/or siding.
Equipment used (antenna, preamp, etc)
approx. direction antenna is pointing.
Yes, thanks Roger, those are all good ideas in your earlier post.
Specifically, the type and thickness of building materials the signal(s) are going through before they reach the attic antenna will be important to note.
For example: In the attic in Kingston, depending on where the signal is coming from and where I place an antenna in the attic, the signal could possibly go through a vertical clay brick wall on two sides of the attic, or a different signal might go through an angled part of the roof with wood frame construction and asphalt shingles.
And then there's aluminum siding on the gables, the soffit, and the eaves, and the eaves troughs ... and this metal has major effects around these areas.
So there's lots to consider with "building materials" in the path of the signal.
( a member mentioned earlier/good point ... if you have TWO layers of shingles on the roof ... that likely causes more signal loss - makes sense )
Regarding: Direction the Antenna is pointing ... YA ... for sure.
Because with Attic setups, with beams and timbers, other obstructions, and space limitations in the attic ... One might *NOT* physically be able to point the antenna exactly straight at the transmitter.
The antenna might be pointed OFF at some angle.
Also ... pointing might be OFF as you may be inside a CLOSED space in the attic and can not see outside for any reference points to aim correctly.
And so YA ... that might be a real important one to note ... if not pointed exactly at the transmitter - a probable situation in the attic.
[ So that makes trial and error to find the BEST / Most powerful signal location and aiming more useful - or - as suggested earlier - the use of a SIGNAL meter of some kind like a portable SPECTRUM ANALYSER ... don't we all wish ... ]
I can think of another one ... Weather conditions: SNOW or ICE on the roof.
Or RAINING / water running off roof. Recent RAIN / roof or wall materials still wet or damp.
What happens when an antenna is inside - like in an ATTIC - is all complex and affected by many things.
Stay tuned ... this thread will get really interesting ...