[Elecraft] Help with KAT1

Sat Jan 18 18:15:01 2003

Hi

Ok can you touch your jumper connected to the antenna to each one of the
toroids and see if the received signal gets lost on any of them. Check the
relays for a unsoldered pin. Set the tuner menu to L1-L4 one at a time then
turn off the K1 and check for a low resistance reading from pin 1 to pin 9
of P2. If you get a reading of more than 1 or 2 ohms then that inductor has
a bad solder joint. Also make sure the control IC does not have any bent
under pins in the socket.

Don Brown
KD5NDB

----- Original Message -----
From: "Doug Person" <[email protected]>
To: "Don Brown" <[email protected]>
Cc: <[email protected]>
Sent: Saturday, January 18, 2003 4:44 PM
Subject: Re: [Elecraft] Help with KAT1

> Yes.  It's not going to be something that obvious.
>
> ----- Original Message -----
> From: "Don Brown" <[email protected]>
> To: "Doug Person" <[email protected]>; <[email protected]>
> Sent: Saturday, January 18, 2003 4:44 PM
> Subject: Re: [Elecraft] Help with KAT1
>
>
> > Hi
> >
> > Did you remember to install the little one turn loop on T1 and
disconnect
> > R36
> >
> > Don Brown
> > KD5NDB
> >
> >
> > ----- Original Message -----
> > From: "Doug Person" <[email protected]>
> > To: <[email protected]>
> > Sent: Saturday, January 18, 2003 3:28 PM
> > Subject: [Elecraft] Help with KAT1
> >
> >
> > Of all the kits to have trouble with...  The KAT1 is pretty simple but
> it's
> > got me stumped.  On page 9, I go through the steps to calibrate the SWR
> > bridge but the voltage at TP1 varies only slightly between 1.6 and 2
> volts.
> > Power out under any circumstances with the Kat1 installed is 0.  Can
> receive
> > only faint signals.  With KAT1 out, the K1/4 works perfectly.  If I clip
a
> > test lead to the center pin of the antenna coax and then touch P2 pins
> 9-10
> > signal levels come way up.  If I touch K4 pin 3 signals come way up.
Same
> > for K1-K3.  I've examined ever part with a magnifying glass looking for
> > trouble. Everything looks perfect.  I pulled out T1, carefully rewound
it
> > with fresh wire and reinstalled - no change.  I know I'm missing
something
> > pretty basic.  I just don't know what.  Appreciate any assistance very
> much.
> >
> > Doug -- K0DXV
> > K2/100 #1920  K1/4 #1297
> >
> > --- StripMime Report -- processed MIME parts ---
> > multipart/alternative
> >   text/plain (text body -- kept)
> >   text/html
> > The reason this message is shown is because the post was in HTML
> > or had an attachment.  Attachments are not allowed.  To learn how
> > to post in Plain-Text go to: http://www.expita.com/nomime.html  ---
> > _______________________________________________
> > Elecraft mailing list: [email protected]
> > You must be a list member to post to the list.
> > Postings must be plain text (no HTML or attachments).
> > See: http://mailman.qth.net/mailman/listinfo/elecraft
> > Elecraft Web Page: http://www.elecraft.com
> > _______________________________________________
> > Elecraft mailing list: [email protected]
> > You must be a list member to post to the list.
> > Postings must be plain text (no HTML or attachments).
> > See: http://mailman.qth.net/mailman/listinfo/elecraft
> > Elecraft Web Page: http://www.elecraft.com
>
> _______________________________________________
> Elecraft mailing list: [email protected]
> You must be a list member to post to the list.
> Postings must be plain text (no HTML or attachments).
> See: http://mailman.qth.net/mailman/listinfo/elecraft
> Elecraft Web Page: http://www.elecraft.com
>