[Elecraft] K2 w/KAT2 question

[Petr Ourednik]

Dear Don,

Many thanks. 
Could you be so kind to advise how to set KAT2 to bypass please?
I did not find Bypass mode so it looks like some CALS or POUT? Will have to explain to father by phone…

73 - Petr, OK1RP
--
B: http://ok1rp.blogspot.com
YT: https://urlzs.com/UHNH9
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機能するものを変更しないでください。
What could be easier..?  ¯‍∖‍_‍(‍ツ‍)‍_‍/‍¯

On Mon, Sep 1, 2025, at 10:33 PM, W3FPR wrote:
> Petr,
>
> Do not use the lower panel BNC connector if the KAT2 is installed.  
> There will be no power control and the K2 can be damaged due to 
> excessive PA current.
> Use ANT1 or ANT2 on the KAT2 panel.  The KAT2 can be either set to 
> bypass or do a TUNE into a 50 ohm dummy load using the ATU menu parameters.
>
> 73,
> Don W3FPR
>
> On 9/1/2025 12:09 PM, Petr Ourednik via Elecraft wrote:
>> Hi folks,
>>
>> so sorry for stupid question.
>>
>> My father (83) is trying to use his K2 with KAT2 ATU installed.
>> As he is using antenna with LDG tuner in attic at the feed point
>> he is not sure if he should use main ANT/50Ohm connector or one of
>> the Ant1/Ant2 on the rear panel. (he does not want to use internal KAT2) right now.
>>
>> He tried to put antenna to main ANT/50Ohms BNC connector and as it is listening,
>> he tried to key down and hoped that external tuner in attic works.
>>
>> I am 200km away so I cannot check it, but I am worrying about the K2 finals if the
>> antenna path is not correct and SWR exceeds limits.
>> I tried to read K2 manual, but I did not find to me clear info. I only found the statement
>> "Do not use main ANT/50Ohm if ATU is installed" which makes me nervous.
>>
>> Could someone be so kind to let me know or explain what is correct please?
>>
>> Many thanks in advance.
>> (sorry I acquired K2 for father long time ago and I never used it as I am driving K3...)
>>
>> 73 - Petr, OK1RP
>>