On Sat, 08 Oct 2005 20:33:14 GMT, Cecil Moore wrote:

Owen Duffy wrote:
Cecil, it is someone else who has on a number of occasions suggested
the quarter wave thing in email correspondence, and here in postings?

Yep, it's not me, it's Reg. I have defended the Bird wattmeter
design. Reg sez one needs at least 1/4WL and preferably 1/2WL
in order to accurately ascertain the "real" SWR.

Not it was not Reg... end of the guessing game.

Having regard to the definition of VSWR (SWR), I can understand Reg's
point that the direct way to measure VSWR requires sampling voltage or
current over a quarter wave of line where you can find / observe the
actual minimum and maximum.

Having said that, there are other measurements that one can make that
allow one to reasonably predict what the VSWR would be.

Owen
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