[600MRG] XXM and XSV note

[dick.bingham]

Greeting everyone

I, too, get the +\- n*60Hz decodes on some signals but only when the 'main' signal is in the plus dB range and the sideband levels are around SNR = -30 dB.

What this indicates to me is folks probably need to clean-up their power supplies to minimize the residual AC-ripple in their power supplies.

Dick/w7wkr and xsh-26 CN98pi

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> On Oct 27, 2014, at 5:54 PM, KU4XR <ku4xrradio at gmail.com> wrote:
> 
> Hi all:
> 
> Band is exceptionally quiet tonite, and signal are already quite strong..
> Ken - XXM started out in positive numbers.. 2 stations I have yet to decode,
> is XPQ, and XSV in Neils new QTH.. I have a problem that really nothing
> can be done about.. I get the 60 Hz Up and Down decodes on XXM all the
> time.. This starts in the early evening, and lasts until the wee hours of
> the morning, and then disappears.. I have also seen multiple decodes
> on XIQ several times, and even at 120 Hz from his mean frequency..
> XJM has also shown the extra 60 Hz decode on occassions..
> The thing that makes XXM's decodes " my problem " is that 60 Hz UP
> from his mean frequency of 475.706, puts the extra decode at 475.766 KHz
> which is right on top of where Neils signal is.. There is nothing that can
> be done about the " WSPR Anomaly " which has happened to probably
> about every receiver at some point.. Just wait it out, because it_Does_
> go away..
> An added observation here.. My cleaning of the ground connections
> recently, has also quieted 630 meters noticably.. The biggest problem
> as far as noise is concerned that I will now have to contend with, will
> be the noisy powerlines as the WX starts getting colder.. Buzz, Buzz, Buzz
> 
> 73 all:
> 
> Andy - KU4XR
> 
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