[Elecraft] K2 / KX3 receiver observation - need explanation

[Vic Rosenthal]

Perhaps it was 3-phase hum? The really big amps run on 400V 3-phase circuits (no, Elecraft won't be making these)!

Vic 4X6GP/K2VCO 

> On Jun 6, 2015, at 12:54 AM, Oliver Dröse <droese at necg.de> wrote:
> 
> 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
>>