[Elecraft] KX3: nearby noise post-mortem

[Ralf Wilhelm]

Hi Nick,

Turning on the preamp increases the isolation between the local oscillator and the antenna port. I also wasn't sure if my "buzz" went away when I turned on the preamp (I couldn't hear it any more) but I used the spectral display of the MixW-Software and the microphone of my laptop to check and I found it didn't go completely away (was still visible in the waterfall) but got much weaker...

Greetings

Ralf, DL6OAP   

Am 10.02.2014 um 15:52 schrieb Nicklas Johnson 

> Now that you mention it, I did notice the buzz went away when I turned on the preamp, but I thought it was just my imagination or that the static had just become sufficiently loud that my own hearing wasn't responding to it anymore.
> 
> ​    Nick​
> 
> On 10 February 2014 03:02, Ralf Wilhelm <ralf at super-deutschland.net> wrote:
> 
> When I got my KX3, I connected it to a piece of wire lying on the floor for initial testing and was having the same problem, but switching on the ISO amp in the menu solved it for me as did the 8khz feature and turning on the 10dB preamp.
> 
> Normally the antenna is far away from the wiring and the re-emitted signal is much weaker than the original signal, but if the only signal is the local oscillator, this is possibly not true and the fraction re-emitted by the wiring is stronger than the original local oscillator.
> 
> -- 
> N6OL
> Saying something doesn't make it true.  Belief in something doesn't make it real. And if you have to lie to support a position, that position is not worth supporting.