[Skimmertalk] RBN spots analyses tool as signal quality checker

[Igor Sokolov]

Tom, in case of R3ZZ all the skimmers show similar picture. Besides I myself 
heard R3ZZ on at least 3 different frequencies aprox 1 khz up and down the 
main frequency. These ghost signals were some 30 db down the main signal.

73, Igor UA9CDC
----- Original Message ----- 
From: "Tom Berry" <tberry1 at triad.rr.com>
To: <skimmertalk at contesting.com>
Sent: Monday, February 28, 2011 1:38 AM
Subject: Re: [Skimmertalk] RBN spots analyses tool as signal quality checker


> Igor,   A VE6 had me spotted all over 40 meters and I am pretty sure I
> was not overdriving my amp.
>
> 73 Tom AA4VV
>
>
> On 2/27/2011 3:30 PM, Igor Sokolov wrote:
>> I was operating in UBA part time and ran into interesting feature of RBN
>> spot analyses tool.
>> Check 26th of Feb OL5Q. The call sign in question is R3ZZ who was single
>> band 40m entry.
>> Analyses of SNR and frequency shows that his signal for some time was
>> observable on several frequencies at the same time. Besides these 
>> multiple
>> signals correlate very well with the appearance of the second harmonic.
>> Similar picture is found on other skimmers (UA9CLB, DK9IP)
>> Interestingly the problem is not permanent. It appears that in the 
>> beginning
>> of the contest his signal was OK. Then he probably decided to overdrive 
>> his
>> linear to get more room on the band. Anyway this small discovery of mine
>> shows how useful this new beta tool can be.
>>
>> 73, Igor UA9CDC
>>
>>
>>
> _______________________________________________
> Skimmertalk mailing list
> Skimmertalk at contesting.com
> http://dayton.contesting.com/mailman/listinfo/skimmertalk