On Fri, 10 Oct 2003 11:07:53 -0700, Jack Twilley
wrote:

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My question is: what is an acceptable SWR range? I know that 1:1 is a
desirable SWR, but when does SWR become undesirable to the point that
it shortens the lives of my tubes?

I am using a Kenwood TS-520 and an MFJ Versa Tuner II.

The 520 uses tubes for finals and a Pi Network for matching. As long
as the network tunes and loads without exceeding the tube ratings it
should run just fine.

All that the tuner does is extend the matching range, so it matters
little whether the external tuner, or the built in Pi network does the
matching. (as long as it does match)

Roger Halstead (K8RI EN73 & ARRL Life Member)
www.rogerhalstead.com
N833R World's oldest Debonair? (S# CD-2)


Jack.