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
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,
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 ?