I think you are right, it's not as simple as that.
The output impedance of the generating device would seem to be
significant. In many cases it would not be easy to ascertain that output
impedance, one could only guess.
ALso, I assume you are referring to a "piece" of wire to be connected at
one end to the RFI source and the other wire end to be free.
If the output impedance of the RFI device is low. It would make the wire
more of a quarter wave long radiator. For example a 32' wire would be
resonate then around 40 meters.
If the RFI device had a high impedance, the same 32' piece of wire would
likely be resonant in the 20 meter band.
Ray, W4BYG
On 2/12/2021 07:02, Tony wrote:
All:
The question below came up in a recent conversation:
If a device that generates RFI at a consistent level across the HF
spectrum were connected to a wire that was 1/2 wavelength at a given
HF frequency, would the level of RFI be noticeably stronger at that
frequency?
The consensus was that it *should* be because the device is generating
RF like any other RF transmitter and the wire being 1/2 wave would act
as a dipole at the resonant frequency.
Sounds plausible, but I have a feeling it's not as simple as that.
Tony
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