[Elecraft] KX1 losing its match

[Trev - K6ESE]

I'd really like to hear if this is an issue and if there is a solution. I've
been thinking of building a KX1 for the fun of it, but don't want a buggy
rig...

>From my point of view it sounds like an RF on the rig problem...high voltage
at the antenna connector may be triggering the ATU into some wierd tune
state? It's just a guess, but in the past I've had similar problems with
other rigs when this was the case, a voltage node at the rig...

73's Trev K6ESE
----- Original Message ----- 
From: "David Pratt" <david at kippax.demon.co.uk>
To: "Lloyd Lachow" <llachow at yahoo.com>
Cc: "List Elecraft" <elecraft at mailman.qth.net>
Sent: Thursday, April 14, 2005 11:00 AM
Subject: Re: [Elecraft] KX1 losing its match


> I get a very similar problem with my KX1, Lloyd, and it has put me off
> using it.
>
> I can tune it up and it matches nicely, producing almost 4W output. Then
> unexpectedly while in the middle of a QSO the relays will start
> clattering and the power goes down to 1 to 2W.
>
> I have rewound all my toroids and checked everything for dry joints and
> solder bridges, but the problem still persists.  It doesn't happen every
> time I use it, but it is unreliable.  Any pointers that anyone can give
> as to the possible cause will be much appreciated.
>
> 73 de David G4DMP
>
> In a recent message, Lloyd Lachow <llachow at yahoo.com> said....
> >  Lately, there have been a bunch of times when I
> >power my KX1 with a 12V supply, activate the tuner to
> >get a match, and the result is 4-5W and a good match.
> >Then, while operating, or just while it's sitting, not
> >being operated, I'll sometimes hear a few relays
> >chatter for a split second, and the match seems to
> >have been lost. When I transmit, I see that the power
> >out is down to 2W or so. I need to activate TUN again,
> >which will restore the match and the higher power out.
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>