There is a KAT500 configuration option that causes the KAT500 to turn off its XTAL oscillator when not tuning and not transmitting. See Configuration, Edit Configuration, Idle Sleep. It's also in the firmware release notes back a few months.
73 de Dick. K6KR
> On Feb 24, 2014, at 6:32, "Dauer, Edward" <
[hidden email]> wrote:
>
> Birdie at 28004:
>
> Are you also using the KAT500? I have had a birdie (at about S3) at the
> same frequency since putting the K3 and KAT into service with their
> original firmware. I have been able to remove it only by removing the
> power from the KAT500 - not just turning it off, but actually removing the
> power. I think there has been some talk on this reflector about a fix for
> that -- if that's the source of yours. I too would like to know how to
> kill it altogether.
>
> Ted, KN1CBR
>
>
>
>> From: Poul Erik Karlsh?j (PKA) <
[hidden email]>
>> To: "
[hidden email]" <
[hidden email]>
>> Subject: [Elecraft] K3 Birdie 28004.560 kHz
>> Message-ID:
>> <
[hidden email]>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> After upgrading to MCU 04.83 I have a strong birdie (S6) on 28004.560 kHz.
>> I think I read about someone having the same, just only a short while
>> after power ON.
>> This one is constantly present and is quite annoying.
>> What is causing it and how may it be removed?
>> /oz4un
>> Paul
>
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