Re: [IRCA] Wobblers and a possible explanation

["W. Curt Deegan" <WWWR@xxxxxxxxxxxxx>]

Craig,

I would think such a pattern could be followed with Spectran, 
Spectrogram, etc.

I watch Wobblers all the time -- though right now the Wobbler is 
swinging 1-2 kHz, not much of a challenge -- as well as measure 
carrier off-sets of properly functioning transmitters, down to a few 
Hertz or less.

One problem might be where other carriers, more or less on frequency, 
could make tracking the desired one difficult.

Sounds like a very intriguing proposition.

Curt
-------
W. Curt Deegan
Boca Raton, (southeast) Florida
http://ScooterHound.com/WWWR/wobbler


At 10:26 AM 2/17/2007, you wrote:
>[snip]
>
>Speaking of oscillators..  If a station were to intentionally shift it's
>frequency from 10Hz high to 10Hz low in some recognizable pattern, could the
>Spectran-type programs detect that?  I would think that would be relatively
>easy to do, and would be an interesting variant on a DX test.  Slow speed
>morse code with very narrow band frequency shift keying.  I would think a
>small battery-operated flip flop circuit using an ancient 555 timer chip
>could make the keying.  In the common Harris Gates 1 transmitter, there's
>probably a place where it could be tied in through a switching diode and
>capacitor to minimally jump the frequency a small (and legal) amount.  This
>would probably be totally transparent on any normal radio.  I'll have to
>look into this, if I ever get any free time.
>
>Craig Healy
>Providence, RI


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