Total posts : 45366
Thelegacy, what you are saying about Part 15 AM range may or may not be true, depending on a wide range of factors.
Here are some of the installations in which I achieved that mile range.
A Rangemaster, tuned for exactly 100mw input, mounted outside at ground level, no radials (it was grounded to the metal mast pounded into the earth).
A Talking Sign, mounted on the ceiling, with the wire running outside, up and over the roofline of a rancher (one story) and held in place with a PVC pipe.
A ProCaster, mounted at ground level similar to that of the Rangemaster (although the Rangemaster achieved greater overall range and sounded better with outboard audio processing, including a Symetrix 421 and an Inovonics 222).
You’re likely not going to get that kind of range with an antenna indoors. Just a fact of life. And I don’t believe there will be a magic antenna (one that’s legal, at least) that will change the laws of physics.
Other factors – the field strength output by the transmitter, which varies widely. The Rangemaster is one of the best, as it can be tuned exactly to the limit, while the Talking House as an example, can’t be tuned at all (and has about 1/2 the field strength of the Rangemaster).
Audio processing also has positive (or negative, with the lack of) affects on range.
Of course, this has all been discussed before, numerous times. In marginal situations such as yours, you just have to get somewhat creative. But then, that’s part of the fun of Part 15.