[Elecraft] Different SWRs on K3 and External Meter

[John Woodard]

Thanks so much to everyone! Very helpful. The dummy load was connected to
the main antenna jack, which might then be part of the problem. However, I
do use the K144XV internal transverter, so it sounds like I might still
need to do the milliwatt calibration.

On Tue, Feb 6, 2018 at 12:06 PM, Jack Brindle <jackbrindle at me.com> wrote:

> John;
>
> Where did you have the dummy load connected for the milliwatt calibration?
> As shown on
> page 52 of the K3S manual, it should be connected to the XVTR OUT jack,
> NOT the
> main antenna jack.
>
> Note that the milliwatt calibration is optional. If you aren’t planning on
> using a transverter,
> there is no need to do it.
>
> Jack, W6FB
>
>
> > On Feb 5, 2018, at 8:59 PM, John Woodard <john.l.woodard at gmail.com>
> wrote:
> >
> > On Sun, Feb 4, 2018 at 17:45 John Woodard <john.l.woodard at gmail.com>
> wrote:
> >
> >> I just installed the KXV3B board, upgrading from the KXV3A. When I went
> to
> >> do the 1mW calibration at the end, the calibration failed because the
> SWR
> >> was 2.9:1 on 52 MHz. I tried a couple more times, with different dummy
> >> loads and cables and found the same result.
> >>
> >>
> >> I then connected an external SWR meter to the dummy load and found that
> >> the external SWR meter showed a flat 1:1 SWR with the dummy load (as
> >> expected) but the K3 SWR value was always higher, typically 1.4 or
> 1.5:1 up
> >> to 2.9:1 on 52 MHz into the dummy load. The tuner works perfectly on all
> >> bands, however.
> >>
> >>
> >> Has anyone had a similar issue? I can’t quite tell if the problem is in
> >> the KAT3 or on the K3 main board, and more importantly what the fix
> might
> >> be.  Also, since the 1mW calibration failed, are there any other
> >> workarounds? Many thanks in advance!
> >>
> >>
> >> 73 de John, WK8A
> >>
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