Peter Brackett wrote:
Cec:
What are you talking about ? There are no "circulators" in a Bird!

No, there's a circulator in the source to keep the forward power
from changing with SWR.

The Bird merely samples V and I at a single point on the line
and it's internal analog computation circuitry computes power
from those two measurements of voltages. B= V - RI the
computed reflected voltange and A = V + RI
the computed incident voltage, what's the big deal?

There's no big deal at all, Peter. But did you realize that the
the voltage proportional to the total voltage vectorially added
to the voltage proportional to the total current is a constant
as long as constant forward power and constant reflected power
is maintained no matter what phase exists between the forward
and reflected waves? Mull that one over for a bit.
--
73, Cecil, W5DXP