Another suggestion is to run the same test after local sunset. Most of the AM
stations in the country have a much lower night time power and are required to
switch to that after local sunset.
Some stations may, by virtue of using a large directional antenna array get FCC
approval for a daytime power of 50KW but are required to switch to as low as
500 watts at local sunset. Give it a try and you might find that BC overload
can be impacting your readings.
Herb Schoenbohm, (ex-KV4FZ)
W2pm@aol.com wrote:
> I don't suggest this is the issue here but I have found after extensive work
> with it that the MFJ259B is quite sensitive to BC band and/or any other
> "strong RF" coming in off the antenna in question. I do not live particularly
> close to BC stations but was getting strange and inexplicable readings on my
> Inv L and other topband antennas. Then I bought the tunable filter device
> they sell and all readings fell into expected or likely boundaries.
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