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Re: LF: 500KHz QSB

from [Graham] [Permanent Link][Original]
To: <[email protected]>
Subject: Re: LF: 500KHz QSB
From: "Graham" <[email protected]>
Date: Sun, 28 Dec 2008 15:29:36 -0000
Importance: Normal
In-reply-to: <005a01c968ff$2a99ee10$6401a8c0@asus>
References: <005a01c968ff$2a99ee10$6401a8c0@asus>
Reply-to: [email protected]
Sender: [email protected]
Gary,
 
I assume its selective fading , you can see it at 100 Hz separation at >
 
 
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 !
 
 

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