Re: [IRCA] Cuban jammer on 1550, very strong.

["Jim Renfrew" <jrenfrew@xxxxxxxxxxxxxxxx>]

Yes, but how do you know what to write in the logbook.  Is it definitely a 
Cuban transmission?  Jim Renfrew

----- Original Message ----- 
From: "Barry McLarnon" <bdm@xxxxxxxxxx>
To: "Mailing list for the International Radio Club of America" 
<irca@xxxxxxxxxxxxxxxx>
Sent: Saturday, March 24, 2007 12:54 PM
Subject: Re: [IRCA] Cuban jammer on 1550, very strong.


> On Saturday 24 March 2007 00:48, W. Curt Deegan wrote:
>> For anyone who would like to hear the Whooper jammer up close, I've
>> uploaded an MP3 file recorded earlier this evening, here:
>> http://ScooterHound.com/WWWR/radio/1550_032307_194235.mp3
>
> I was hearing the jammer fairly well here last night (thanks to your 
> alert),
> once I'd gotten CBE beaten down a bit.  First time I've heard it... now I
> have to decide whether to add it to the log!  Which brings up a related
> topic...
>
> I didn't get around to weighing in on the recent discussion of adding 
> special
> test signals to stations when running DX tests to enable computer-aided
> detection of the signals.  I have no objection to such things, since I
> frequently use tools such as FFT spectrum analysis myself.  When it comes 
> to
> logging stations, however, we all have to decide where to draw the line, 
> and
> as far as I'm concerned, my log is a record of "stations heard".  By that 
> I
> mean that I have to hear something in the audio from the station that
> establishes the ID, and that audio has to be something that was 
> deliberately
> amplitude-modulated onto the signal.  Les recently brought up the example 
> of
> KFI-640, which a few years back had a carrier frequency drift with a 
> unique
> signature that could be easily spotted in a spectragram plot of 640 kHz
> carriers.  I was able to spot this signature, and still have a screen 
> capture
> of the plot around here somewhere, so I definitely was able to receive 
> KFI's
> carrier - but, I didn't add KFI to my log (and don't expect to, anytime
> soon!).  By the same token, I've "seen" the carriers of many distant and
> exotic stations and have been pretty certain of who they were (taking into
> account propagation conditions, plus the carrier frequency measurements
> documented by other DXers), but unless I can get some definitive audio to
> confirm the ID, they don't go in the log.
>
> It's natural that we (some of us, anyway) like to compare our "totals" to
> measure our DXing exploits.  We already have the complication that some 
> folks
> count call changes as "new" stations, and some don't (I'm in the latter
> camp).  In the future (if MW DXing has one, which is increasingly 
> doubtful),
> I guess it may get more complicated, as computer-aided IDs become more
> commonplace.  In any case, there will be no point in claiming new loggings 
> or
> stating your totals unless you also explain your criteria for "hearing"
> stations.
>
> I think the jammer probably does qualify as a new one by my criteria, so 
> I'll
> add it to the log.  MW logging #2113 (not including call changes, NDBs,
> wobblers, and the like, but does include TIS's, pirates, and now one 
> jammer).
>
> :-)
>
> Barry
>
> -- 
> Barry McLarnon  VE3JF  Ottawa, ON
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