[Elecraft] SWR Readings:Differences

[briana]

My experience with this is that if one is seeing an SWR >2.5 -3  it 
usually means either the braid or center conductor isn't connected.

I'd redo the connectors.

You don't say how the measurements were made at the tower.  But I'm 
guessing it was done with another short piece of coax.   Thus both 
connectors (ant end and shack end) are suspect.

Testing out the coax (coax problems are really rare these days with new 
coax) is a good idea.   After connectors are installed, put a dummy load 
at one end and measure the SWR.   It should be close to 1:1.

73 & GL
Brian/K3KO

On 9/2/2014 8:06 PM, pastormg2 at 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
>
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