At 7:27 PM -0600 8/23/06, Karl Larsen wrote:
Now either of these should be possible for your tuner to tune. Your
right the impedance changes between these values and if your very
careful you can get close to 50 +j0. But why?
Well, I think you answered my question.Changing the feedline length
changed the impedance to a value the tuner could handle, which was
the original issue.Remember that this is a coax fed antenna, not
ladder line (which I have at my home QTH). I know that swr is very
high and not an issue with ladder line; that's what I use at home.The
tuner is simply a device to allow maximum transfer of power from the
transmitter to the feedline.
At 9:42 PM -0400 8/23/06, Don Wilhelm wrote:
I believe two points need to be made about this:
First, if the SWR on the feedline was 1:1, changing the length of the
feedline would have no effect. The conclusion is that the original SWR had
to have been something other than 1:1.
Don- I think you may have missed my original post, where the issue
was a high swr when trying to use the tuner on my coax fed dipole.
Adding a few feet of RG 174 allowed the tuner to find a match.Neither
the tuner nor added feedline changes the true state of the antenna,
but only provides the best match between rig and feedline.
--
Dan Presley-N7CQR-Portland, Or QRP-L #502 ARS #71
[EMAIL PROTECTED]
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