[Elecraft] K3 Noise when moving KX3 VFO

[Walter Underwood]

The KX3 has some leakage of the local oscillator when receiving. You can elimination this by turning on the isolation prepamp. Use the RX ISO menu item. See page 38 in the manual.

wunder
K6WRU

On Sep 28, 2013, at 7:56 AM, VaibhaV Sharma wrote:

> Hello,
> Here is a weird problem.
> 
> I have two dipoles in the backyard, one connected directly to a K3/10 and
> the other to a KX3.
> 
> * No external tuners or any other equipment in the middle
> * K3/10 is on 40 meters to 7.187.00
> * KX3 tuned to the same frequency
> * KX3 powered by internal batteries (same problem with external power)
> 
> At this point if I tune around with the KX3 (between 7.184 and 7.186.75)
> and the K3 stays on the same frequency, you can hear a loud tone on the K3.
> 
> Here is the video -
> https://www.youtube.com/watch?v=2DgHUcYxjVc
> 
> In the video, the KX3 is on mute initially. All the audio (receive and
> tone) is from the K3.
> 
> Is the KX3 generating some noise offset around the center frequency?
> 
> -- 
> VaibhaV
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--
Walter Underwood
wunder at wunderwood.org