hum in K3 when above 30W

[NK6A-Don Minkoff]

I have a K3, Ser no 4569, that all of a sudden is giving me a
transformer like hum when I transmit above 30 W.  Does something need
tightening all of a sudden? This is a very annoying. Anyone else
experience this and find a fix?

--
Don Minkoff
NK6A

IDXC April 15-17, 2016

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[Don Wilhelm-4]

Have you considered that it could be coming from your power supply? Try
another power supply or run it from a large battery as a test.

73,
Don W3FPR

On 1/31/2016 2:05 PM, NK6A-Don Minkoff wrote:
> I have a K3, Ser no 4569, that all of a sudden is giving me a
> transformer like hum when I transmit above 30 W.  Does something need
> tightening all of a sudden? This is a very annoying. Anyone else
> experience this and find a fix?
>

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