[Elecraft] KX1 has LED switching noise

[Don Wilhelm]

Paul,

There is a very small amount of that noise on any KX1, but it is not 
enough to raise the noise floor of the receiver.

If the noise in your KX1 is large enough to interfere with weak signals, 
then it is excessive and should be fixed.  Your guess about the 
capacitors is a good starting place - often electrolytics develop a 
higher ESR as they age.

73,
Don W3FPR

On 2/10/2012 1:48 PM, Paul Signorelli wrote:
> My old 2003 KX1 has low level LED/CPU switching noise.
> The switching noise frequency is lower on L1 and higher (and amplitude higher)  on L6 (Brightest Level #6).
> L4 is about 80 Hz.
> Maybe the aluminum bypass (C10, C12) capacitors are opening up.
> i hear it on all bands (I have an 80, 40, 30, 20 meter KX1) and at any battery voltage.
> Anyone solve this issue?
> Paul  w0rw
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