To: rsgb_lf_group@blacksheep.org
Date: Fri, 8 Aug 2003 16:04:49 -0400
Message-ID: <20030808.160449.604.4.riese-k3djc@juno.com>
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From: riese-k3djc@juno.com
Subject: Re: LF: MF Challenge
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isnt WSN on that freq,, nashville Tn
there L O U D in here

Bob  K3DJC 


On Fri, 8 Aug 2003 10:53:28 -0400 "John Andrews" <w1tag@charter.net>
writes:
> Here's an unusual DX reception opportunity which may not be possible 
> from
> the U.K. and EU, but might be fun to try.
> 
> KFI, a 50 kw AM station in Los Angeles, California, has an unusual
> transmitter problem which is causing a +/- 0.5 Hz deviation of their 
> carrier
> over an 11.5 minute period. This results in a very distinctive 
> "square wave"
> on an Argo screen. Dale Rice in Oregon first noticed it, and I have
> confirmed it (at a distance of 4000 km) in Massachusetts. Given the 
> time
> differential, there might be a narrow window before U.K. sunrise 
> that would
> permit reception. If anyone is interested in trying, Carl Swanson at 
> KFI
> Engineering has offered to send special QSLs to those providing 
> proof of
> reception. Here is what he told me, and the rest of the details:
> -----------------------------
> "Please forward this email onto your Lowfer mailing list and let 
> them know
> that I will send any interested listener a verification letter and a 
> KFI
> sticker if they will e-mail me a standard reception report and a URL 
> to a
> screenshot of the carrier like you did (with reception details added 
> to the
> JPG photo itself). Let's try to keep it under a hundred reception 
> reports
> please, quantity of reports isn't as important as widely varying 
> locations
> of reception.
>      To recap, each email should have a 
> name/address/city/state/zip/phone
> number, a standard repection report (date/time(z)/location), and a 
> URL to a
> screenshot of whatever software they are using showing this unusual
> waveform, with the same reception details listed in the JPG itself. 
> No
> attachments to the e-mail, my corporate e-mail will strip any 
> attachment and
> I will never see it."
> -------------------------------
> I have Carl's email address, and will provide it to you on request. 
> I don't
> want to post it here, lest it turn into spam fodder when the 
> reflector is
> archived at QSL.net. Here are the details for your search:
> 
> KFI is in the Los Angeles area, and runs 50 kw on 640 kHz. Dale Rice 
> and I
> have observed their transmitter frequency to be centered on 640.0084 
> kHz,
> varying about +/- 0.5 Hz in a square-wave pattern. Each "cycle" of 
> the
> square wave takes about 11.5 seconds. It can be nicely seen on Argo 
> screens
> from 20 through 60 seconds (Dale has used 120 as well). An Argo 20 
> second
> screen shot from my house (2500 miles!) can be seen at:
> http://webpages.charter.net/w1tag/files/KFI080603.jpg
> I would suggest Argo 30 or 60 second screens as the best. Here on 
> the east
> coast, the signal has been visible between 0400 and 0900 UTC. Such 
> an odd
> waveform will be very distinctive, and excellent proof that you have 
> seen
> KFI's carrier.
> 
> So, have fun... and pester me for that email address.
> 
> John Andrews, W1TAG
> 
> 
> 
> 
>