[Elecraft] KAT1 Install Troubles

[Andy Engle]

As expected, you are absolutely correct!  I owe you ANOTHER one.

K1 #2897 is alive, thanks to W3FPR!


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From: "Don Wilhelm" <w3fpr at embarqmail.com>
Sent: Saturday, July 03, 2010 9:01 PM
To: "Andy Engle" <andy.engle at live.com>
Cc: <elecraft at mailman.qth.net>
Subject: Re: [Elecraft] KAT1 Install Troubles

> Andy,
>
> That trace cut was not to be done on a new K1 RF board.  You will have to 
> remove the resistors and capacitor and repair the trace cut with a jumper 
> wire.  Check page 7 - the "i in a triangle" informational item near the 
> bottom of the page - it says to skip the next 5 steps if your board is 
> new.
>
> I believe 'undoing' those 5 steps will restore things to normal.
>
> 73,
> Don W3FPR
>
> Andy Engle wrote:
>> Hey Gang!
>>
>> I finished my K1 this evening!  All seemed well until I went to install 
>> the ATU (KAT1).
>>
>> During initial test (p.9), I put the ATU mode into F1.3 and then exit 
>> out.  I press WPM- & WPM+ to tune and the display reads P2.3 instead of 
>> the r8.5 that's expected. In the troubleshooting, guidance is to verify 
>> the orientation of U2 and D3.  I verified they are correct.  I also 
>> checked that D3 was still functional. I have checked and double-checked 
>> the solder work on U2, D3, and adjacent components.  All look to be okay 
>> with no obvious shorts.
>>
>> During installation of the KAT1, instructions were to cut the trace on 
>> the bottom of the board and install RF-R4.  R4 was already installed in 
>> the space indicated by the silkscreen on the bottom of the board.  So, I 
>> cut the trace and removed the OLD RF-R4 and reinstalled it, bridging the 
>> trace I cut.  Is this correct?
>>
>> If I put the ATU into TUN mode and exit, triggering tuning causes the 
>> relays to begin switching madly and never stopping.
>>
>> Any thoughts as to how I can figure this out, please?  All help greatly 
>> appreciated!
>>
>> Happy 4th to all!
>>
>> --Andy
>> K0ADE
>>
>>
>