If your line is lossless (it isn't) you would expect the same SWR
readings anywhere along the line. With practical lines that have some
loss, the SWR should be LOWER farther away from the antenna. You are
getting the opposite result.
One cause of erroneous SWR readings is RF flowing on the outside of the
coax. If your rotary dipole doesn't have a balun, this could be the cause.
It's also possible that you have a bad connector or bad piece of coax
between the tower and the K3.
On 9/3/14 3:06 AM, pastor...@verizon.net wrote:
Good Evening, This is Mark Griffin, KB3Z and I have some questions
regarding the SWR readings I get at my tower versus what I get on my
K3. I will give the SWR readings that I got at my tower for a 40
meter rotatable dipole at 55 feet.
Tower:
7000 2.2 7025 1.8 7050 1.5 7075 1.3 7100 1.0 7125 1.1 7150
1.3 7175 1.6 7200 2.0 7225 2.2
K3 Readings:
7000 3.5
7025 3.2
7050 2.9
7075 2.6
7100 2.4
7125 2.3
7150 2.4
7175 2.5
7200 2.6 7225 2.9
What would cause such a big difference. The cable run from my antenna
switch on the tower to my K3 is only an additional 75 feet. I am
using RG-213 cable. Is there anyway that I can test the SWR reading
that my K3 is giving me?
Mark Griffin, KB3Z
--
Vic, K2VCO/4X6GP
Rehovot, Israel
http://www.qsl.net/k2vco/
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