"Cecil Moore" wrote
The insertion of the Bird does not appreciably change the V/I ratio.

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Cec,

I have tried to avoid entering this argument.

But it appears to me that ALL SWR meters work on the principle of a
common, identical, take off point for both voltage and current
samples.

Therefore, anything inside the meter which could constitute a
transmission line, no matter how long or short, if it separates the
two effective take-off points, it is a small source of error and its
actual length otherwise plays no part in the measuring process.

( I mean its actual length is not included in the basic design
calculations, except perhaps in rare instances to minimise the error.)

( The error arises from a phase-shift error in tapping off the current
sample. There may be no problem with defining the location of the
voltage sample. All depends on meter construction and the tapping
methods which vary but do not affect the basic design principle of a
common tapping point.)

I am not trolling. Please read very carefully. Try to limit yourself
to HF and VHF. Do you agree? Yes or No?
----
Reg, G4FGQ.