Re: LF: 500KHz QSB

["Graham" <g8fzk@g8fzk.fsnet.co.uk>]

Gary,

 

I assume its selective fading , you can see it at 100 Hz separation at >

 

  > http://groups.google.com/group/uk500khz/web/propagation

 

add the shot with a few pointers ?

 

G ..

 

Nb ..  check out the 500 band in those day's , no mal-adjusted cw signals

right in the middle !

 

 

From: Gary - G4WGT

Sent: Sunday, December 28, 2008 3:15 PM

To: LF -RSGB LF Group

Subject: LF: 500KHz QSB

Hi LF,

 

Just made an interesting observation regarding QSB at 508KHz.

 

For my own benefit I have started running a slow SpecLab showing 500 to 510KHz & capturing for evaluation.

 

Occasionally the NDB ?Z? shows up. The strange thing is that even though the carrier on 508KHz & the two ID offsets at 509 & 507KHz are relatively close they each display at different depth of fading or an out of phase fade pattern.

 

I am unsure why this should be, any comments please, see capture at link :-

 

http://myweb.tiscali.co.uk/wgtaylor/ZNDB.jpg

 

73,

 

Gary - G4WGT - IO83QP.

 

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