[Elecraft] Vedr: SWR Readings:Differences

[Per-Tore Aasestrand]

Hi,

Martin makes an important point!
The VSWR indicated on the K3 is measured between tuner and PA. The tuner
does not influence the VSWR on the feeder.

P-T / LA7NO


On 3 September 2014 12:18, Martin Storli - LA8OKA <arcticpeak at yahoo.no>
wrote:

> The first thing you need to do is to use the same SWR-meter both at the
> tower and at you're K3.
> When measurering close to the K3 and if it is a big difference between
> you're SWR meter and the K3, the K3 is probably indicating the wrong SWR,
> or the K3 tuner is coupled in making the SWR to be something quite
> different than it actually is.
>
> If both SWR-meters show higher SWR in the shack than at you're tower,
> there is probably something wrong in the last coax run, hook it up to a
> dummyload and measure SWR. The SWR shall normally be lower in the shack
> than at you're tower due to the losses in the coax.
>
> Martin Storli
> LA8OKA
> Oslo, Norway
>
> ARCTICPEAK's Radio pages!
> http://www.arcticpeak.com/radio.htm
>
>
> ________________________________
>  Fra: "pastormg2 at verizon.net" <pastormg2 at verizon.net>
> Til: elecraft at mailman.qth.net
> Sendt: Onsdag, 3. september 2014 2.06
> Emne: [Elecraft] SWR Readings:Differences
>
>
> 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
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net/
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to arcticpeak at yahoo.no
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to ptaa at ieee.org
>