Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re: LF: VLF QRM puzzle - why not the same in a split screen on SL?

To: [email protected]
Subject: Re: LF: VLF QRM puzzle - why not the same in a split screen on SL?
From: "[email protected]" <[email protected]>
Date: Thu, 07 Apr 2011 18:21:35 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
User-agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.15) Gecko/20110303 Thunderbird/3.1.9
Roger let me know when you have observed the 2 lines after 1400 and I will show you the spectrum at the same time around 8.976kHz which is virtually clear.

Grabber is not updating the DFCW600 window at the moment, until you let me know.

Eddie

On 07/04/2011 17:35, Roger Lapthorn wrote:
Thanks Eddie, but we are only talking about 5Hz difference and the signal is there on one window and not on the other. Odd.

73s
Roger G3XBM

On 7 April 2011 17:24, qrss <[email protected]> wrote:
Hi Roger

I don't fit your category, (understanding SL) however I often see this, noise from the mains I suspect, huge dirty sine waves. Considering they originate from a 50Hz source they are strongest at lower frequencies, rarely climbing above 6kHz but peaks sometimes get to 8.971kHz not much higher..

73 Eddie G3ZJO


On 07/04/2011 17:09, Roger Lapthorn wrote:
Help...

After lunch today my wife turned on the washing machine and the tumble drier and for two periods there was a burst of interference visible on the lower split screen as vertical noise stripes. What I don't understand is why I don't see these also on the upper trace around 8.976kHz too when the settings are the same.  I have a SL filter selected but it is centred around 8.970kHz with 400Hz width and slopes so this cannot explain this. Surely the noise bursts should appear in both parts of the screen?

Can someone who understands Spectrum Lab explain this please?

73s
Roger G3XBM

--
http://g3xbm-qrp.blogspot.com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/







--
http://g3xbm-qrp.blogspot..com/
http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/




No virus found in this message.
Checked by AVG - www.avg.com
Version: 10.0.1209 / Virus Database: 1500/3556 - Release Date: 04/06/11


<Prev in Thread] Current Thread [Next in Thread>