Home › Forums › temp › Another survey. How far does your Part15 transmitter reach? › AM range survey
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This is probably going to develop into an interesting and useful thread. So here is my input:
SSTRAN AMT3000 feeding a base coil loaded resonant 3 m aerial mounted horizontally on my basement ceiling and working off a waterpipe ground gives:
Fifteen dollar portable radio good signal range of 200 feet.
Car radio good signal about 500 feet.
Scratchy signal on car radio about 1000 feet.
Farthest I ever heard the signal while mobile 1.8 miles. Audio was barely detectable.
I measured the input power to the final of my AMT3000 and it is 93 mW. with the described aerial.
I live in a low residential density city with underground utilities. Outside my house, there is no interference to AM. Inside, AM is not usable due to electrical noise and the shielding of stucco walls (the expanded metal mesh under the stucco).
I am in central Ohio and if I recall the conductivity here is 8.
My station obviously is not optimized for range so my numbers are probably low compared to those using outdoor vertical aerials. My station is for my personal use and right now I don’t plan to “improve” it.