[Elecraft] KPA100/KAT100 on 160 Hi Current

[J F]

Hi John,

Do you use the KAT100 with yours? Or is it just
straight to the load?

I do see a lot of RF in the shack with my sniffer on
160. It seems like it is coming from the sides of the
KAT100. I'm going to experiment this weekend,
hopefully, taking the tuner out of the line altogether
and see if it makes a difference.

I'll post as soon as I can.

Cheers,
Julius
n2wn


--- John Reiser <reiserj at optonline.net> wrote:

> Hi Julius,
> 
> Both my K2/100s, #4970 and #5570 exhibit excessive
> current draw on 160 
> meters, as indicated by the ammeter on my 30 watt
> Astron PS.  It gets up to 
> 27 or 28 amps.  I use a 30 amp fuse.  In every other
> respect, my two 
> K2/100's work perfectly.  Current draw on all the
> other bands is less than 
> 20 amps.
> 
> I don't have an antenna for 160, so I never transmit
> on that band anyway, 
> and this is not a big problem for me.  Still, being
> a bit of a 
> perfectionist, it bothers me that it exists.
> 
> I mentioned it on the reflector a while ago. 
> Someone said they had the same 
> experience, but had no solution.  Someone else
> suggested that I retune the 
> 80 meter bandpass filter to represent a compromise
> between 80 and 160.  I 
> tried that, but the excessive current draw continued
> regardless of the 
> bandpass tuning.  (Could it be due to the KPA100
> going into oscillation at 
> the 160 frequency?)
> 
> When I saw your post, I became hopeful that it might
> evoke a response from 
> someone who had come up with the definitive
> solution.  But so far there 
> hasn't been any.
> 
> Good luck and 73,
> 
> John, W2GW
> 
> ----- Original Message ----- 
> From: "J F" <phriendly1 at yahoo.com>
> To: "Elecraft Discussion List"
> <elecraft at mailman.qth.net>
> Sent: Wednesday, December 06, 2006 5:49 AM
> Subject: [Elecraft] KPA100/KAT100 on 160 Hi Current
> 
> 
> > Well ARRL 160 is history now.
> >
> > As usual, with the K2 I heard more than I could
> get to
> > hear me ;o) Evidently I heard and worked more than
> > some of the local contesters with "other" brand
> > equipment heheh.
> >
> > Anyway I have a problem... I use the KPA100 with
> the
> > KAT100, and there may be no connection between the
> > two, to stretch the bandwith of my antenna. If I
> set
> > the K2 for 100 watts (or just twist the knob far
> > clockwise), the ALC does not kick in. In a key
> down
> > situation, the current keeps climbing until the
> fuse
> > blows. If I set it for 99 watts (I realize this is
> not
> > that precise) the ALC does function somewhat. I've
> not
> > tried it with a dummy load. The antenna was fairly
> > well matched (1.2:1 at it best point)and has a
> current
> > balun on it. So this really shouldn't be
> happening. Do
> > I have a problem with the KPA?
> >
> > Thanks,
> >
> > Julius
> > n2wn
> >
> >
> >
> >
>
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> 
> 



 
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