Return to KLUBNL.PL main page

rsgb_lf_group
[Top] [All Lists]

Re[2]: LF: Dirty signal

To: PA7EY <[email protected]>
Subject: Re[2]: LF: Dirty signal
From: Chris Wilson <[email protected]>
Date: Mon, 25 Apr 2016 14:12:22 +0100
In-reply-to: <[email protected]om>
Organization: Gatesgarth Developments
References: <[email protected]> <[email protected]> <[email protected]om>
Reply-to: [email protected]
Sender: [email protected]
Hello Ulrich,

Monday, April 25, 2016

  Thanks  for  that, I  am sure it must be something that has happened
  recently  as  no  one  has  mentioned  an  issue in the 18 months or
  whatever  it's been on the air fairly regularly until now. Quite why
  Windows  seems to randomly alter sound card settings I have no idea,
  but  I  am  definitely not alone in seeing this happen. I appreciate
  you  taking the time to report and look forward to working you again
  soon, all the best Ulrich!


Best regards,
 Chris  2E0ILY                          mailto:[email protected]



> Hi Chris,


> Your signal appeared ok here, receiving your signal at a respectable -7 dB.
> I saw your question too late to make a screenshot of your signal,
> saw your WSPR and tuning signal though.


> Kind regards,


> Ulrich, PA7EY

> 2016-04-25 14:03 GMT+02:00 Chris Wilson <[email protected]>:

> Hello LF 'ers
>  
>  Monday, April 25, 2016
>  
>  
>  
>  
>  Best regards,
>   Chris  2E0ILY                          mailto:[email protected]
>  
>  
 >> 25 April 2016
>  
>  
 >> Had a report that my LF WSPR2 signal was dirty with massive side bands
 >> on Sunday. I had a look at my setup today found Windows had decided to
 >> up the audio level from WSPR to maximum into the TS-590 and scoping
 >> the output of the pre amp and frequency doubler before my G3YXM amp
 >> showed it looking very ropey indeed.
>  
 >> I reset it and did a couple of normal WSPR2 transmissions interspersed
 >> with using the WSPR TUNE function, whilst watching on the G3XXM and
 >> G4WGT LF grabbers. I am no expert whatsoever, but it doesn't look bad
 >> now to me. Is this an adequate test to make and to assume things are
 >> now OK? Thanks.
>  
 >> Screenshots are at http://www.chriswilson.tv/signals/signals.html
>  
>  
>  I  managed  to  get a few more minutes on this, and now my SA is fixed
>  and calibrated I thought some SA screen shots would be useful. I stuck
>  a  small  rubber duck antenna in the input port and looked at my signal
>  in  real  time  off  my normal TX antenna whilst actually transmitting
>  WSPR2.  Tried  with  2  frequency  spans.  Also  took  photos  of  the
>  scopematch  showing a good V /I balance, and the amp meter set to show
>  reflected power, which all but nothing. Am I clean....? :)
>  
>  http://www.chriswilson.tv/signals2/signals2.html


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