Richard Clark wrote:

Cecil Moore wrote:
The Bird is in error when it reports the SWR to be 1:1.

This is the poor carpenter blaming his tools.

Exactly! You got my point. It is operators who refuse to
recognize the errors in the Bird's readings and report
a bogus SWR as "correct" who are at fault.
--
73, Cecil http://www.qsl.net/w5dxp