In a message dated 4/30/2007 9:06:10 A.M. Pacific Daylight Time,
n3ox@n3ox.net writes:
> I checked the impedance transformation that you'd get from 2 inches of
several different types of parallel line at 14MHz. With "Open Air
Dielectric 19/1.30" I get 50+j6 ohms at the far end when the line is
looking into a 50+j0 load.
> In other words, no big deal.
That was my feeling but the antenna - a MonstIR - went from 1.3 or so to
3:1 - a big change. What else could make that much difference?
While hardwiring the coax is less than optimal, it seems to me that you
could see the impedance bump with a TDR or similar but the RF really doesn't
care how it's transported (so it's out-of-balance for 6 inches - so what?).
The feedline is acting like a feedline, it's connected to the antenna
and the antenna is acting like an antenna so I'm trying to figure out what
would cause the SWR jump.
More input appreciated.
Cheers,
Steve K7LXC
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