[Elecraft] KAT2 problem: bridge null adjustment

[garigue]

Stephan Hello ....   Tom  KI3R  nr Pittsburgh ..

I had the same problem and I was pulling my hair out.  I sent the unit back
to repair and a solder bridge was found beneath one of the torroids.  The
bridge was on one of the relay pins ..and I double checked them when I did
the soldering but I missed.  I must have redid that darn T1 4 or 5 times!!!!
The unit works excellently now and is a real pleasure to use in the field
and on vacation.

God Bless   KI3R  Tom
----- Original Message -----
From: "Stephan Walder, HB9DDO - K2" <k2@hb9ddo.org>
To: "'Elecraft'" <elecraft@mailman.qth.net>
Sent: Tuesday, January 21, 2003 4:10 PM
Subject: [Elecraft] KAT2 problem: bridge null adjustment


> Hello K2-owners
>
> I'm on the way to assemble/install the KAT2 option. Everything looks good
> including the preliminary tests. When I came to the point where I'm
supposed
> to adjust C55 for the bridge null I ran into problems. Even with power
> reduced to the minimum at 0.1W I get a high current warning when I tune. I
> checked several times to make sure that the dummy-load/rf-power-meter is
> conncted to the right Ant jack (1) and the correct antenna is selected. My
> K2 reacts as if there were no antenna at all. I even checked the cable
> between TX and dummy-load, went back totest without KAT2 to make sure
> there's no problem there.
>
> According to the troubleshooting section I checked on T1, even re-soldered
> it to make sure there's no problem there...
>
> Fellow hams, I'm stuck ! Any help/idea/suggestion is welcome. Anybody seen
> this or a similar behaviour before ?
>
> vy 73, Stephan, HB9DDO, K2 S/N 3128
>
> P.S. I finished the basic K2 last week, made the first QSO on 20, 30 and
40,
> repaired my G5RV last saturday and enjoyed some nice QSO's on 40m. Beeing
> too lazy to tune my G5RV with an old manual tuner for every band-change I
> decided the KAT2 would be the next option to deal with.
>
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