When I posted the measurement data, I really had no agenda. That seems to
have been supplied by all of the responses. I simply wanted to document it to
avoid some hand waving that goes on.
However, now I will drop the other shoe. Assuming that the RX input is a 50
ohm resistor is a mild approximation in comparison with assuming that the
'generator' driving it has 50+j0 source impedance. Particularly true if that
source
is something as ill-defined as a beverage antenna, which is what most of us
listen with on 160. The approximations abound and cascade, which is why
absolute calibration is so futile. What we really want to measure is the value
of E
or H of the incident EM field, which is the only true measure of received power.
73
Eric von Valtier K8LV
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