"AA" wrote in message
...
When
cutting the feedline for a dual band (2m/70cm), for maximum performance,
it
needs to be cut to multiples of electrical half wave length. Does it
need to
be cut for 2m? or 70cm? a combination of both? or split the difference?


As an old friend of mine (yup, I've got friends...) once said, "Make the
coax
feedline just long enough to reach the rig."

Fits most (but not all) situations.

It seems like in the past I have had situations (especially on 70cm and
above) where the length of the feedline had a major effect on the difference
in the transmitted power at the antenna....as much as 50% less signal
measured between the transmitter and the antenna with random lengths as
opposed to only losing 4% or 5% when cutting the feedline to multiples of
the electrical 1/2 ~ .

A
"...if one tolerates bad manners, they grow worse. I must find the oaf
who did
this thing, explain to him his offense, give him a chance to apologise,
then
kill him." (R.A. Heinlein, "The Cat Who Walks Through Walls")