[Elecraft] K2 / KX3 receiver observation - need explanation

[Oliver Dröse]

Hi Gernot,

as I am hearing lots of similar signals from a few of the very very big 
guns here in Europe contest after contest and no matter if using my 
K3's, the KX3, or whatever other rig (i.e. FT-817, TS-590, ...), I'd 
suppose this is rather a TX quality problem of them than one with your 
receivers. If you would hear it on *every* strong signal than it would 
sound like an RX problem but I suppose you also heard all the strong but 
clean signals, did you?

73, Olli - DH8BQA

Contest, DX & radio projects: http://www.dh8bqa.de


Am 05.06.2015 um 16:07 schrieb gt-i at gmx.net:
> Hello everybody,
> during the WPX contest I noticed some weird sounds in the K2 when 
> tuning to strong (>S9+20db) stations.
> The sound was distorted, kind of ripple, but it did not sound like 
> typical ringing.
> I also noticed LZ9W booming in on 80m with S9+40db, producing 3 images 
> in the K2 and the KX3. However, in the K2 the 2 ghost signals were 
> frequency modulated. How could this happen?
> Another big one, LY2W, also produced 3 signals in the KX3 but all the 
> 3 were nice and clean.
>
> I thought these ghost images would depend on the receiver 
> architecture, or am I wrong here?
>
> Regarding the first observation: Since the K2 is already > 10 years 
> old, could component aging already play a role. If so, where to look for?
>
> Thanks for any ideas!
> 73
> Gernot
> DF5RF
>
>
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