Example of "Obstruction Loss" to a MW AM Signal
Q: What loss of field intensity does a single private home cause to the groundwave propagation of a MW AM signal?
A: The signal strengths shown on a Tecsun PL-880 receiver tuned to a 500W AM broadcast station located 55 miles from the receiver location were ...
Outside the east wall: 37 dBµ
Along the length of an inside central hall oriented along the radial: 36-38 dBµ
Outside the west wall: 37 dBµ
The true field intensity of this radio station at the receive location was about 1 mV/m, using FCC-approved data and methods.
Note that fields shown as radiated by the Part 15 AM station that were included in an earlier post here today were greater than 1 mV/m, for distances of 50 meters to about 150 meters away from that system.
“...but with a long ground lead that signal increases and can overcome an obstruction.”
That is a generalization and an assumption and probably also an exaggeration.
No it's not! The longer your ground lead, the more field strength it produces, and the more capable it becomes to penetrate buildings so you can receive it inside and beyond.. How is that an assumption or exaggeration?
TheLegacy: The churches around here don't have steeples. What should I do next?
Clearing the Record
End80 rightly asks: "How is that an assumption or exaggeration?"
When I said that I mistakenly thought I was responding to the other Rich, in which case I would have been correct.
Then it came to light that you'd made the statement in which case I agree with you.
Each of you would have different definitions for making the same statement.