[Elecraft] KXPA100 Intermittent VSWR Issues

[Dan Baker]

I am running the latest firmware. And it does it in manual mode also. Maybe
Elecraft does need to see it.

Dan

On Monday, December 8, 2014, Cady, Fred <fcady at ece.montana.edu> wrote:

> Are you using AUTO or MAN mode?  You should be using MAN mode after
> training the tuner.
> Cheers,
> Fred KE7X
>
>
> > -----Original Message-----
> > From: Elecraft [mailto:elecraft-bounces at mailman.qth.net <javascript:;>]
> On Behalf Of
> > Dan Baker
> > Sent: Monday, December 08, 2014 4:36 PM
> > To: elecraft at mailman.qth.net <javascript:;>
> > Subject: Re: [Elecraft] KXPA100 Intermittent VSWR Issues
> >
> > Mine does the same thing all the time, so much that I do not like to
> > using the tuner any longer.
> > I confirmed it was tuner in the amp by operating into a dummy load. Its
> > does it into the dummy load on CW and SSB. I have not said anything,
> > thinking an update will be pushed out and the problem will disappear.
> > In the meantime I use the KAT500. Its all to frustrating to be in a QSO
> > and have it act up. It kind of behaves like the KAT500 did before they
> > upgraded the firmware. I am sure they will get around to taking care of
> > it.
> >
> > 73,   Dan KM6CQ
> >
> >
> > I've run into several occasions where in mid-CW transmission my KXPA100
> > (with internal tuner) SWR takes a momentary jump from matched to maybe
> > 3:1. I see the SWR jump on both the KXPA front panel LEDs and on  the
> > KX3 VSWR display.  It lasts for maybe half a second, I hear  several
> > clicks of the relays in the tuner, and them it's back to normal. When
> > normal the SWR is pretty much 1:1 on the KX3, and the second green LED
> > lit on  the KX3. I've not seen it happen at the start of a
> > transmission, but  rather several characters into a CQ or exchange..
> >
> > In the ARRL 160 contest Saturday night this was happening perhaps once
> > every 2-3 minutes. I'm using a fairly well matched antenna - not random
> > wires.
> > I  also encountered this problem on 15 meters when operating from
> > W1AW/8 in WV  in October. In both cases I was running a pretty high CW
> > duty cycle while  running at a pretty good clip. The amp was warm, but
> > the heat sink air flow is not blocked.
> >
> > Any thoughts?
> >
> >
> > 73  -  Jim  K8MR
> >
> >
> > --
> > KM6CQ
> > Dan Baker
> > www.km6cq.com
> > @danielbaker
> > DM09dn
> > SKCC: 8260  NAQCC: 6817
> > QSL via LoTW, eQSL, & Direct.
> > D-Star REF014C
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>


-- 
KM6CQ
Dan Baker
www.km6cq.com
@danielbaker
DM09dn
SKCC: 8260  NAQCC: 6817
QSL via LoTW, eQSL, & Direct.
D-Star REF014C