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Re: LF: SUGGESTED TEMPORARY CHANGE TO [OPERA ] MF QRG

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Subject: Re: LF: SUGGESTED TEMPORARY CHANGE TO [OPERA ] MF QRG
From: wolf_dl4yhf <[email protected]>
Date: Wed, 01 May 2013 09:00:19 +0200
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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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