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This morning I tested the i.A.M. transmitter as described in my original post at the top of this thread.
The result was slightly improved coverage with the grounded antenna when compared to stringing the stock 10′ “indoor” antenna wire vertically outdoors.
I had no signal strength meter to use; only my car radio. My best guess would be that the RF at about 1/10 mile out may have about doubled. But — it’s one of those instances where you ask yourself what’s 2 times zero?
I will say that I live in an area where ground conductivity is only around 1.0… and that my yard is very “ledgy”. So we’re not talking ideal grounding conditions anyway.
I feel strongly that I’ll get far better results when I plant my copper ground plane.