Message-ID: <5180BD83.7070203@freenet.de>
Date: Wed, 01 May 2013 09:00:19 +0200
From: wolf_dl4yhf <dl4yhf@freenet.de>
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Subject: Re: LF: SUGGESTED TEMPORARY   CHANGE TO  [OPERA ]  MF   QRG
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Imo, it doesn't matter if the passbands overlap or not. The problem is 
most of us use receivers tuned to USB with SSB bandwidth, and if you 
have a 'very active transmitter' in your neighourhood, or a 'strong 
active transmitter' somewhere else, your RX is de-sensitized during the 
local guy's TX periods (and there may be an awful lot, "beacon style").
I just had to learn the hard way on 40 meters, where EU receivers 
without the possibility of passband tuning mainly receive an OK beacon 
(which permantently sends UTC), but as long as that beacon is on, will 
not hear the DX because the receiver's AGC / S-meter needle is pinned 
(sic..) to S9. No joy. Being heard with 1 or 2 watts on WSPR in VK7, but 
never decoded the VK7 here even though he was running a couple of dBs 
more...

All the best,
  Wolf .

Am 30.04.2013 23:26, schrieb Graham:
> SUGGESTED TEMPORARY   CHANGE TO MF   QRG
> Its proposed to drop the MF Opera   operating   QRG to 474.2 dial set USB
> As it  would  appear , the  WSPR   qrg  is not to  move  back to  the  
> original  477  spot  any time  soon, to  enable   dual monitoring  of  
> Opera and  WSPR  as was  the  original  status , Opera tones being  
> arranged to  fall  out side the  wspr  pass band , the  two  modes  
> coexist on the  same  dial-set usb qrg
> No  change to  the  software is  envisaged  as  an  eventual return to 
> 477  is  anticipated  once  any  band  planning  is implemented, or  
> more normal use  is made of the  mid  band.
> *The  move was  previously  suggested, but  not implemented  to  
> prevent a   clash  with  wspr-15   activity , which now appears to  
> of  subsided .*
> Where  as  it was  unlikely  to  compromise the  Opera decode  engine 
> , it was evident from  events that  conversely wspr  could  of  been 
> affected.
> Comments   any one ?
> Tnx- Graham


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    <div class="moz-cite-prefix">Imo, it doesn't matter if the passbands
      overlap or not. The problem is most of us use receivers tuned to
      USB with SSB bandwidth, and if you have a 'very active
      transmitter' in your neighourhood, or a 'strong active
      transmitter' somewhere else, your RX is de-sensitized during the
      local guy's TX periods (and there may be an awful lot, "beacon
      style").<br>
      I just had to learn the hard way on 40 meters, where EU receivers
      without the possibility of passband tuning mainly receive an OK
      beacon (which permantently sends UTC), but as long as that beacon
      is on, will not hear the DX because the receiver's AGC / S-meter
      needle is pinned (sic..) to S9. No joy. Being heard with 1 or 2
      watts on WSPR in VK7, but never decoded the VK7 here even though
      he was running a couple of dBs more...<br>
      <br>
      All the best,<br>
      &nbsp;Wolf .<br>
      <br>
      Am 30.04.2013 23:26, schrieb Graham:<br>
    </div>
    <blockquote cite="mid:E5739B03B3994A14BC426034A04DC204@AGB"
      type="cite">
      <meta content="text/html; charset=ISO-8859-1"
        http-equiv="Content-Type">
      <meta name="GENERATOR" content="MSHTML 8.00.6001.19412">
      <div>SUGGESTED TEMPORARY&nbsp;&nbsp; CHANGE TO MF&nbsp;&nbsp; QRG&nbsp; </div>
      <div>&nbsp;</div>
      <div>Its proposed to drop the MF Opera&nbsp;&nbsp; operating&nbsp;&nbsp; QRG to&nbsp;&nbsp;
        474.2 dial set USB</div>
      <div>&nbsp;</div>
      <div>As it&nbsp; would&nbsp; appear , the&nbsp; WSPR&nbsp;&nbsp; qrg&nbsp; is not to&nbsp; move&nbsp; back
        to&nbsp; the&nbsp; original&nbsp; 477&nbsp; spot&nbsp; any time&nbsp; soon, to&nbsp; enable&nbsp;&nbsp; dual&nbsp;
        monitoring&nbsp; of&nbsp; Opera and&nbsp; WSPR&nbsp; as was&nbsp; the&nbsp; original&nbsp; status ,
        Opera tones being&nbsp; arranged to&nbsp; fall&nbsp; out side the&nbsp; wspr&nbsp; pass&nbsp;
        band , the&nbsp; two&nbsp; modes&nbsp; coexist on the&nbsp; same&nbsp; dial-set usb qrg </div>
      <div>&nbsp;</div>
      <div>No&nbsp; change to&nbsp; the&nbsp; software is&nbsp; envisaged&nbsp; as&nbsp; an&nbsp; eventual&nbsp;
        return to 477&nbsp; is&nbsp; anticipated&nbsp; once&nbsp; any&nbsp; band&nbsp; planning&nbsp; is&nbsp;
        implemented, or&nbsp; more normal use&nbsp; is made of the&nbsp; mid&nbsp; band. </div>
      <div>&nbsp;</div>
      <div><strong>The&nbsp; move was&nbsp; previously&nbsp; suggested, but&nbsp; not&nbsp;
          implemented&nbsp; to&nbsp; prevent a&nbsp;&nbsp; clash&nbsp; with&nbsp; wspr-15&nbsp;&nbsp; activity ,
          which now appears to&nbsp; of&nbsp; subsided .</strong></div>
      <div>&nbsp;</div>
      <div>Where&nbsp; as&nbsp; it was&nbsp; unlikely&nbsp; to&nbsp; compromise the&nbsp; Opera&nbsp;
        decode&nbsp; engine , it was evident from&nbsp; events that&nbsp; conversely&nbsp;
        wspr&nbsp; could&nbsp; of&nbsp; been affected.&nbsp; </div>
      <div>&nbsp;</div>
      <div>Comments&nbsp;&nbsp; any one ?</div>
      <div>&nbsp;</div>
      <div>Tnx- Graham </div>
    </blockquote>
    <br>
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