[Elecraft] SWR difference between 2 different K3's

[Michael Walker]

Hi Rich

I think you have your answer and the B rig needs some calibration.

Mike va3mw



On Sat, Jul 19, 2014 at 8:10 PM, Richard Thorne <rthorne at rthorne.net> wrote:

> I have a strange swr issue I'm trying to resolve.
>
> I have two K3's for an SO2R setup, lets call them K3-A and K3-B.  On 40
> meters the swr that the K3 displays on K3-A indicates what is to be
> expected 1.5:1 at 7.001 and 2.0:1 at 7.105, however on K3-B  the K3
> displays 1.0:1 at 7.001 and 2.7:1 at 7.105.
>
> I'm using the same exact coax to connect to both rigs and I'm going
> directly to ant port 1 on both rigs.  Neither rig has the ATU in line (K3-B
> doesn't even have an internal ATU).  The antenna is a 2 element 40m yagi.
>
> I've used an external Daiwa swr/power meter which agrees with rig K3-A's
> swr  when connected to either radio.
>
> So it appears that the displayed swr on rig K3-B is giving an incorrect
> reading.
>
> Any ideas?  Is it time to calibrate the wattmeter?
>
> Thanks
>
> Rich - N5ZC
> ______________________________________________________________
> 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 va3mw at portcredit.net
>